trailer << /Size 58 /Info 14 0 R /Root 18 0 R /Prev 136486 /ID[<72d74a10d6068c59ad0f9fb7bca08b46><5f4ef97c0fc4c4e6550d152d55c55ceb>] >> startxref 0 %%EOF 18 0 obj << /Type /Catalog /Pages 15 0 R /Metadata 16 0 R /Outlines 1 0 R /Threads 20 0 R /Names 22 0 R /OpenAction 19 0 R /PageMode /UseNone /PageLabels 13 0 R /PageLayout /OneColumn /ViewerPreferences << /DisplayDocTitle true >> >> endobj 19 0 obj << /S /GoTo /D [ 23 0 R /FitBH -32768 ] >> endobj 20 0 obj [ 21 0 R ] endobj 21 0 obj << /I << /Title (A)>> /F 24 0 R >> endobj 22 0 obj << /Dests 11 0 R >> endobj 56 0 obj << /S 36 /O 123 /E 139 /L 155 /Filter /FlateDecode /Length 57 0 R >> stream 0000003694 00000 n The coolant temperature sending unit is mounted in the lower back side of the water cover outlet and is exposed to the hottest coolant just as the coolant exits the head and enters the water outlet cover. 2 Years It is not necessary to have the engine coolant flowing into the expansion tank in either case. SBC cooling system flow direction can be divided into three types: Coolant is a liquid used in car engines to keep them running at the desired temperature. These pipes must be made of materials that dont conduct electricity, such as rubber or plastic, so they wont short-circuit when exposed to high temperatures produced by exhaust gases from a running engine. 3 Years Lovely template 3 4 l engine coolant flow diagram illustrations when the engine warms up the wax melts expands and pushes the valve open allowing. It is triggered when your chevy sonic 's coolant temperature fails to reach the proper operating temperature. 2, see Fig. The same happens with any plumbing system in an automobile engine. Water can also be added directly to the intercooler to achieve similar results compared with water-to-air systems. Page 6 of 85 . Top 5 Electronic Circuit Simulation Software, How To Draw Arduino Circuit Diagram Online. Wiring Diagram For Marathon Nzm 56b34d15524a-gx Electric Motor, Wiring Diagram For A 1986 Kawasaki Klt185a, Coil Wiring Diagram Ford 4.9l With Points. 2. 0000003931 00000 n By junkmandan - Tuesday, September 16, 2008 3:25 PM: I was gonna add that the low flow concept used a double pass radiator to provide cooler coolant to the aftercooler. Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by WyoVac, Mar 12, 2017. C13 Cat Engine Problems cu-cats.blogspot.com. New cam bearings were installed. 0000002469 00000 n 1-5 Months By checking this box and clicking the "Send me job offers" button below, I represent that I: By checking this box and clicking the "Send me job offers" button below. 0000074452 00000 n Allison Transmission and all of their transmissionmodels listed on this website are registered trademarks of Allison Transmission. The machine shop head builder did install the cam bearings. Discussion in 'Trucks [ Eighteen Wheelers ]' started by Moving on Down the Road, Nov 11, 2010. From left to right: Intake Manifold; Air Filter Housing; Engine Block; Thermostat Housing; Water Pump Gasket; Engine Oil Filter Cap (Oil Filter); Water Pump Drive Shaft; Throttle Body (Throttle Valve); Coil Pack; Injector Rail Support Plate (Injector); Exhaust Manifold Pipe Clamp (Exhaust Pipe Clamp); Headlamp Bracket Bolt (Headlamp Bracket Bolt). It also prevents overheating of the engine. How To Troubleshoot Brake Fluid Leaking From Rear Wheel? 7c5029 junction box group engine generator set caterpillar 3512 3yf00001 up starting and electrical system 777parts cat 3406e engines 1mm 2ws ecm wire diagram automatic voltage regulator avr 314 7755 for 3306 c15 c18 c27 c32 pp3516 pm3412 pm3516 g3406 gas compression . The 3406 PEEC evolved from the legendary 3406 mechanically governed engine with the . If you are using an air-cooled engine, there will be no need for this because it doesnt get hot at all, but if you are using liquid cooled engines, these components will be very important in protecting your engine from overheating. It circulates throughout the engine and absorbs heat, preventing damage. It is also known as Vehicle Service Manual (VSM) or Technical Service Manual (TSM). Once the engine has cooled down, the coolant is released, and the system is ready to start again. 16 0 obj << /Linearized 1 /O 20 /H [ 1378 302 ] /L 50914 /E 35876 /N 2 /T 50476 >> endobj xref 16 35 0000000016 00000 n 0000002121 00000 n The coolant is usually water, but other liquids like glycol or alcohol can also be used. 0000001316 00000 n 2) Radiator Cap - Modern radiator caps are . 1 for a full view of the Caterpillar B and E engine wiring diagram, including cab and engine switch circuits. We have also discussed why its necessary to keep the coolant level correct, what can happen if its not and which way does coolant flow through an engine. John Deere and all of the John Deere engine models listed on this website are registered trademarks of John Deere. It doesn't appear that any coolant is getting into the crankcase. Each line has a letter that indicates the type of fluid or substance that flows through that particular part of the system. On friday the truck pulled in. The water cooling system in the engine is the process of passing a cold liquid through the radiator. 0000028008 00000 n On friday the truck pulled in. 0000086118 00000 n 3. The pump also helps to disperse heat away from the engine and prevents it from building up in the engine. Electrical Components. When the engine stops, the coolant is circulated throughout the engine to help it reach normal operating temperatures. The diagram has 4 different colored lines that indicate various cooling system parts. The third type of Sbc Cooling System Flow Direction is mixed-mode systems that have some portions in one direction but include some portion where air moves in a mixed manner from either inlet or outlet section or both sides at once for all three sections together. 0000001845 00000 n Each company we work with has specific experience requirements for their drivers. December 9, 2022 by Jenny Fresh. CAT 3406E 14.6L Sensor from www.vanderhaags.com. In order for you to receive the best possible offers, please make sure your answers above are accurate prior to submitting. Cat G3406 gas engine. Caterpillar 3406e Engine Diagram e Cat Engine Diagram Pdf cat c10/c12, b, e engine schematic, sk - 1) schematic for caterpillar e/ engines in. 0000098106 00000 n A cooling system is pressurized because different fluids flow through it, which are pumped at high pressure. For a radiator cap type system, check for any clogs in lines leading from the expansion tank (with fluid under pressure) to where they exit through an opening at one end of the radiator core tube. You take care of it, you wax it, you wash it and you love to know everything about it. 0000009784 00000 n In a nutshell, coolant flows through an engine in a counter-clockwise fashion. (Avoid Risk). C fuel rate at tc rpm 18.0 gal/hr 18.9 gal/hr 17.0 gal/hr. Most of the images displayed are of unknown origin. We carry a wide selection of parts for Caterpillar 3406, 3406B, 3406C, 3406E and G3406 engines, including overhaul kits, cylinder kits and main bearing sets. If you need any help finding a part, please use our quote request form or call us at 888.687.0539: our knowledgeable inside sales staff will promptly assist you. There are three types of cooling systems in a vehicle: A cooling system is a device that circulates air through the radiator or heat exchanger of an engine to remove heat from it. 0000001421 00000 n These systems rely on controlled boiling (evaporation), which creates more surface area for heat transfer while reducing pressure to improve efficiency. If not enough piping exists between components, then overheating can cause damage to either hose or pipe insulation; this could result in a fire inside your vehicles engine compartment if left unattended for too long! Caterpillar 3406B ENG Parts Diagrams. Could the camshaft bearing be installed incorrectly? The first type is the vertical flow. It can be used in many applications such as computers, fans, electric motors, etc. Another way to look at this problem is as follows: When the engine starts up, hot coolant goes from block through thermostat housing into cylinders where it mixes with cold water which flows from the condenser into water pump where its pumped through cooling system till it reaches radiator where its cooled down so that when it gets back to block again, it has already lost much of its heat. It is triggered when your chevy sonic 's coolant temperature fails to reach the proper operating temperature. Among the coolants, Dexcool and universal antifreeze are the most used. trailer << /Size 51 /Info 15 0 R /Encrypt 18 0 R /Root 17 0 R /Prev 50466 /ID[<13b83e86170dbd0066f9edfba09d692f><13b83e86170dbd0066f9edfba09d692f>] >> startxref 0 %%EOF 17 0 obj << /Type /Catalog /Pages 14 0 R /Outlines 6 0 R /PageMode /UseNone /OpenAction 19 0 R >> endobj 18 0 obj << /Filter /Standard /V 1 /R 2 /O (Q8*yZXJ3 m) /U (3 !K5bz`f\() /P -12 >> endobj 19 0 obj << /S /GoTo /D [ 20 0 R /FitH -32768 ] >> endobj 49 0 obj << /S 69 /T 156 /O 201 /Filter /FlateDecode /Length 50 0 R >> stream So the oil feeds that journal wherever the bearings rotated too? A thermostat works on the principle of sensing the temperature inside a car and then opens or closes the circuit to prevent overheating. 0000018852 00000 n This also applies when draining outdoor hoses during summertime, where hot air rises through radiators, causing backflow problems and heat transfer problems between pipes inside vehicle engines (even though hot air moves upwards). Filters. Our wide inventory of Caterpillar . The cooling system consists of many components, like a water pump, radiator, Thermostat, and so on. Without your consent employers will not be able to contact with job offers, would you like to opt-in now? This cooling system can greatly improve engine performance and fuel efficiency. In CDL School Now 17 0 obj << /Linearized 1 /O 23 /H [ 1607 259 ] /L 136954 /E 133366 /N 1 /T 136496 >> endobj xref 17 41 0000000016 00000 n Coolant Temperature Sensor Added 18 Programmable Parameters 3406B/C vs. 3406E/C-15/C-16 Similarities -Both engines use Throttle Position, Cruise Control, and Customer Parameters to constantly determine a desired engine speed. (Explained)Continue, As an Amazon Associate, I earn from qualifying purchases. 0000012192 00000 n DISCLAIMER: All wallpapers and backgrounds found here are believed to be in the "public domain". The diagram is also a great way to see how the different parts of the engine work together. It prevents dust buildup on mechanical components, which will impede the performance of your machine. If your add Coolant to Ram 1500 is low on coolant,, Read More How To Add Coolant To Ram 1500Continue, Is It Safe Mixing Dexcool and Universal Antifreeze? The only one is the diagram I sent showing the flow at the pipes on the engine. Does the thrust rub against the cam bearing? Geschreven door op februari 13, 2021. Ensuring that coolant flows through the cylinder head prevents heat buildup and eventually destroys the engine. When it detects that cooling is needed, it closes all of its valves and vents them out to avoid losing any additional heat from the engine. Superhauler, Mar 15, 2017 #3 + Quote Reply WyoVac Thanks this. This truck only has 583,467 miles! 0000001513 00000 n Coolant flows from the bottom to the top, and it can be divided into two types: This type of cooling is usually done with an electric fan, Thermostat, or a cooling system that contains circulating water. 0000008064 00000 n One of the things you might not know which way does the coolant flow through an engine. The coolant flow diagram is very useful in understanding the system. c15 ecm 3406e furthermore acert c7 throttle schematic isx likewise. Chevy 5 3 Coolant Flow Diagram: The image below shows a Chevy 5 3 Coolant Flow Diagram that explains how coolant passes through various parts of an engine and their function and purpose. This is why oil enters the coolant side, When you shut down, You still have pressure in the radiator and that can push coolant to the base. Your email address will not be published. Diesel Parts Direct is not an authorized dealer for Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission. There is also one black line with no letter associated with it because its function is to show where all other substances flow into the radiator, i.e., from the engine block, etc. 0000001659 00000 n We strive to provide a high quality online shopping experience. As far as the coolant is concerned, you should not mix it with antifreeze or water because it can cause corrosion of internal engine parts. Big to you thanks for the necessary information. The low flow will drop the coolant temp from the top to the bottom of the rad. In the case of electronics, it should withstand high heat without damage occurring due to overheating or excessive cooling requirements being applied by overloading a components fan with too much airflow. If these are clear and there are no obvious obstructions within reach of the spark plugs or other moving parts within 50 mm (2 inches), then you should be fine. Coolant flow through an engine is crucial for two reasons: It prevents the engine from overheating and protects the engine from freezing. Never run the engine with the engine heater energized. 0000074429 00000 n Detroit Diesel and all of the Detroit Diesel engine models listed on this website are registered trademarks of Daimler AG. around 40degress were a hi/flow only drops temps about 10 to 15 degress. We offer parts for 3406, 3406B, 3406C, 3406E, and G3406 diesel and natural gas engines. By checking this box and clicking the "Send me job offers" button below, I represent that I: By checking this box and clicking the "Send me job offers" button below. Adding coolant to your add Coolant to Gmc Sierra 2500Hd is, Read More How To Add Coolant To GMC Sierra 2500HdContinue, As an Amazon Associate, I earn from qualifying purchases. Know Before You Use. It is triggered when your chevy sonic 's coolant temperature fails to reach the proper operating temperature. On the other hand, if you install a hose at the top of your radiator and want to drain it into a sink, you have to turn off the water supply to prevent water from flowing back down the line when draining takes place. When you turn off your car, this cycle stops because there is no more room for coolant in the system. Lovely template 3 4 l engine coolant flow diagram illustrations when the engine warms up the wax melts expands and pushes the valve open allowing. I have a ford ltl9000 with a 3406b 7fb engine. Mercon Vs Mercon V: Whats The Best Transmission Fluid? the heater allows a reduced amount of coolant to re-verse flow through the heater when the engine is run-ning. How Does A Car Act When The Fuel Pump Is Going Out? . It is generally used for troubleshooting purposes by technicians, especially when there are problems with the cooling system or components. Its also possible that the thermostat seal could be worn, allowing excess coolant to bypass the thermostat.truck engine tech39803.298652662. Using this type of cooling system reduces the heat generated by the engine and thus increases its life span. The two will, Read More Can I Mix 50/50 Coolant With ConcentrateContinue, As an Amazon Associate, I earn from qualifying purchases. A typical example of this situation would be connecting a garden hose from above or from underneath. The process works by taking warm liquid (like your cars coolant) and sending it through a radiator with tubes filled with water or another suitable liquid. Cat c15 acert coolant flow diagram. Lubricating - cooler, right hand filler, full flow filter, gear-driven pump, front or rear sump pan Turbocharger Vibration damper ACCESSORY EQUIPMENT Air compressor, gear driven 16.5 or 31 cfm Air inlet elbows Alternator (12 Volt-65 Amp, 24 Volt-45 Amp or 60 Amp) Auxiliary pulleys and drives BrakeSaver (hydraulic retarder) - front or rear sump It is triggered when your chevy sonic 's coolant temperature fails to reach the proper operating temperature. 0000073804 00000 n It helps you understand your cars cooling system, how it works, and what type of fluids are used in it. 3406a 3406b 3406c 3406e c15 3406a 3406b 3406c 3406e c15 8sb 2ek 3zj 1lw b5r 92u 3zj 4ck 1mm bxs 4ck 5kj 2ws jep 4mg 5ds kra 5kj 5ek mhp 5yg 6ts mxs 7fb nxs. Want more info on your ESN? We do not intend to infringe any legitimate intellectual right, artistic rights or copyright. 6-11 Months Geschreven door op februari 13, 2021. 5+ Years, Please select ALL of your current, valid drivers licenses. 0000015205 00000 n This diagram can help you troubleshoot any issues you may be having with your cooling system. Cookie Policy | 0000001901 00000 n 0000002674 00000 n A good cooling system will also prevent condensation from forming inside the machine, thereby reducing energy consumption and corrosion to critical internal components such as motors and fans. Coolant pumps are used to move coolant within an engine. I would suspect coolant is in the crankcase. As an Amazon Associate, I earn from qualifying purchases. There are no particular directions to pay attention to. See Fig. X;2 oLL((p8X3,o(. fe-caterpillar-engine-diagramCaterpillar Engine Specifications | It Still Runs. I see this often There are several things that can cause this. Every month 400 people find a job with the help of TruckersReport. %PDF-1.4 % This is the most common form of flow direction. 0000114326 00000 n Can You Mix Yellow and Orange Antifreeze? Job Listing Rules. 0000001866 00000 n Read More Is It Safe Mixing Dexcool and Universal Antifreeze? SWIPE SWIPE. November 6, 2018 by jason. It depends on air temperature and humidity as well as other factors like ambient temperature, engine load, and engine speed. JavaScript Disabled - Unable to show Cart. P0128 is a relatively common obdii trouble code. Boiler diagrams, spare parts and user manuals for. I ordered a reconditioned camshaft p/n 187-9381. Cat c15 acert coolant flow diagram. P0128 is a relatively common obdii trouble code. Most of your inexpensive oil coolers on E-BAY will be aftermarket. Required fields are marked *. 0000016976 00000 n November 6, 2018 by jason. The ECM also monitored the engine through electronic sensors including speed, rack and timing, boost, oil, and coolant temperature The 3406B PEEC engine was introduced in 1987 and remained in production until 1993. . As the fluid passes through these tubes, it absorbs heat energy from inside the engine block, causing it to become cooler than the outside air temperature. 0000006786 00000 n There are (10) parts used by this model. Prior to heater installation, check the . Truck engine temp was still at 180 degrees, grabbed oil drain pan, dropped the oil out, dropped the base, with in a couple of minutes found #2 and #4 liners where leaking around the outside of the liners. In the diagram, those are connections 8 and 9. In addition, these pipes should have enough volume for circulating hot water through them when necessary (such as during winter months). As an Amazon Associate, I earn from qualifying purchases. The heat pump cools the air by transferring heat from the system, while the blower circulates the air to keep it cool. I have a question in regards to camshaft end play. In this case, an oil cooler or water-to-air intercooler is used to increase airflow across the core. On friday the truck pulled in. Privacy | 0000002275 00000 n Know Before You UseContinue, As an Amazon Associate, I earn from qualifying purchases. Cat c15 acert coolant flow diagram Cat c15 acert coolant flow . Vue, pontiac g5, g6, buick regal, and more. 0000003145 00000 n Boiler diagrams, spare parts and user manuals for. Ideal applications for G3406 engines include gas lift, gas gathering, and wellhead gas compression. So now you can see how important having a good thermostat or water pump is because these two parts determine how fast your vehicle cools down after starting up. Boiler diagrams, spare parts and user manuals for. I noticed after bolting the cam gear on and begin to torque it, it seems to have a lot of drag. 0000006586 00000 n 0 comments {u f t r v /= ~ 7b 5ba u}3& ' u qc @ y = i ak fo. Customer. 0000001378 00000 n Job Listing Rules. If there are no leaks, you can put your car on level ground and turn on all four tires without allowing them to spin (to prevent engine damage). 1) Radiator - The radiator is responsible for transferal of heat from the circulating coolant to the air passing through it. This happens because when the coolant gets hot, it expands and pushes open a valve inside the Thermostat that lets coolant out of the radiator and into the engines cooling system. 0000011548 00000 n Cookie Policy | This diagram can help you diagnose problems with your cars cooling system if you notice a temperature rise or if your car begins misfiring or loses power when driving at highway speeds. When using a thermostat, make sure that it is appropriately installed and mounted so that it doesnt leak. It keeps the machine running at its optimum level by regulating the temperatures of all components, thereby preventing overheating and damage to critical parts. 0000018746 00000 n 0000129083 00000 n The second type is horizontal flow. This is called free convection, where a closed-loop operates with no pump to move it around and no fans to push it around. 0000018670 00000 n This system helps to protect the engine against heat damage by removing heat from the cylinder head through the cooling system. It doesn't appear that any coolant is getting into the crankcase. 0000004790 00000 n For more advanced parts manuals search capabilities, try using Service Information Systems (SIS). 0000012169 00000 n There a plug in the coolant rail at the rear of block on passenger side ( only if your oil cooler neck attaches in the center of block) don't waste your time running it from compresser. 0000133228 00000 n Parts Lookup - Enter a part number or partial description to search for parts within this model. The Thermostat is used to regulate the coolant flow through an engine. Going Nowhere Fast Save Reply Quote dondiesel444 Senior Member Then, the thermostat opens, allowing coolant to flow from the engine to the radiator. 0000100783 00000 n 0000001568 00000 n Hb``Pg``sg```b,`8 +B15Lwd~30p10~; S0;AqSD+O|Ahs& x330qdiN/a`0 endstream endobj 57 0 obj 133 endobj 23 0 obj << /Type /Page /Parent 15 0 R /Resources 26 0 R /Contents [ 33 0 R 35 0 R 37 0 R 39 0 R 41 0 R 43 0 R 47 0 R 49 0 R ] /CropBox [ 0 0 612 792 ] /Rotate 90 /B [ 24 0 R 25 0 R ] /MediaBox [ 0 0 612 792 ] >> endobj 24 0 obj << /T 21 0 R /P 23 0 R /R [ 63 63 567 729 ] /V 25 0 R /N 25 0 R >> endobj 25 0 obj << /P 23 0 R /R [ 36 63 78 729 ] /V 24 0 R /N 24 0 R /T 21 0 R >> endobj 26 0 obj << /ProcSet [ /PDF /Text /ImageC ] /Font << /F1 28 0 R /TT2 30 0 R /TT4 44 0 R >> /XObject << /Im1 54 0 R >> /ExtGState << /GS1 55 0 R >> /ColorSpace << /Cs6 31 0 R >> >> endobj 27 0 obj << /Type /FontDescriptor /Ascent 905 /CapHeight 0 /Descent -211 /Flags 32 /FontBBox [ -665 -325 2028 1006 ] /FontName /KEOCJN+Arial /ItalicAngle 0 /StemV 0 /FontFile2 52 0 R >> endobj 28 0 obj << /Type /Font /Subtype /Type1 /FirstChar 32 /LastChar 103 /Widths [ 278 278 355 556 556 889 667 191 333 333 389 584 278 333 278 278 556 556 556 556 556 556 556 556 556 556 278 278 584 584 584 556 1015 667 667 722 722 667 611 778 722 278 500 667 556 833 722 778 667 778 722 667 611 722 667 944 667 667 611 278 278 278 469 556 333 556 556 500 556 556 278 556 ] /Encoding /WinAnsiEncoding /BaseFont /KEOFAP+Helvetica /FontDescriptor 29 0 R >> endobj 29 0 obj << /Type /FontDescriptor /Ascent 718 /CapHeight 718 /Descent -207 /Flags 32 /FontBBox [ -166 -225 1000 931 ] /FontName /KEOFAP+Helvetica /ItalicAngle 0 /StemV 88 /XHeight 523 /StemH 88 /CharSet (/R/O/A/D/S/P/E/N/C/L/U/T/H/space/W/I/four/one/eight/seven/F/B/J/five/K/G\ /two/three/nine/M/zero/Y/parenleft/parenright/six/hyphen/V/slash/Q/X/Z/a\ /b/c/d/e/f/g/plus/numbersign/colon/period/quotedbl/comma) /FontFile3 51 0 R >> endobj 30 0 obj << /Type /Font /Subtype /TrueType /FirstChar 46 /LastChar 83 /Widths [ 278 0 556 0 556 0 556 0 0 556 556 0 0 0 0 0 0 0 0 0 0 0 0 0 611 0 0 0 0 667 0 833 0 0 0 0 0 667 ] /Encoding /WinAnsiEncoding /BaseFont /KEOCJN+Arial /FontDescriptor 27 0 R >> endobj 31 0 obj [ /ICCBased 50 0 R ] endobj 32 0 obj 8160 endobj 33 0 obj << /Filter /FlateDecode /Length 32 0 R >> stream With these safety measures, we ensure our information is only being accessed by real humans. As soon as you start driving again, warm air comes into contact with cold radiator fluid, which boils and mixes with other fluids in the engines cooling system to form new solutions (boiling point: 70C). The coolant is passed through a series of tubes and fins that effectively dissipate the heat in the coolant. 8l complete engine online coolant temperature and hydraulic oil temperature for optimized cooling epa tier 4 final, eu stage iiib emission. 4 Years 3500033 ZeroStart CAT 3406 Engine Block Heater 1500W 120V 1" NPT. November 6, 2018 by jason. You should only use a high-quality antifreeze like ACDelco Part Number E38TZ50 (Blue) and put it in your car when necessary. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. 0000003870 00000 n The second component is a fan. Ask your own medium and. P0128 is a relatively common obdii trouble code. The cooler flows towards the exhaust manifold through thermostat housing which is located between the cylinder head and exhaust pipe. A radiator has fins that radiate heat away from the core of the engine to help keep it cool. Ask your own medium and. Ratings: 160-242 bkW (215-325 bhp) @ 1800 rpm are NSPS site compliant capable with customer-provided . A water pump, Head gasket Cylinder liner Cracked head.I like to drop the oil pan and pressurize the cooling system.