i heard from a friend that he too had the same problem. coolant must be moved through the engine in some fashion to achieve better heat transfer efficiency and to limit the possibility of overheating the coolant in the hottest parts of the engine. My engine was just overhauled about 30k ago. Do nothing more to this engine. A forum community dedicated to Diesel engine owners and enthusiasts. system can hold 2.7 gallons of coolant. Member. Engine coolant mixing with engine oil is a sign of an internal gasket or engine failure. $199.00 + shipping . I also have a c-12 and i have added 4 gallons of anti freeze in the last week. Thanks Given: 1090 Thanks Received: 1974 (482 Posts) Posts: 931 Threads: 51 Joined: Sep 2015 10 11-04-2016, 07:43 PM . Cat® C12 Diesel Marine Propulsion Engines, with ratings of 340-490 bhp (254-366 bkW) at 1800-2300 rpm, meet IMO II emission standards with the exception of the 497 mhp (490 bhp) rating at 2300 rpm which meets IMO I emissions standards. We know that it eventually streams antifreeze because of the build-up in the valve covers and breather filters. '06 Cat C9 ACERT 700,000 mi.s No APU No Espar or other fuel fired type coolant heaters No fuel dilution in Polaris labs Oil Analysis (<1% - Estimate) No postassium in Oil (0) so no coolant in oil Motor has not run hot, if anything, too cool 185 to 190 degree area Added a quart of coolant in 50,000 mi.s Motor has no EGR or DPF Poor man's fix of the day if you wish to follow. We were dumping a gallon/day in ours to get finished with harvest last year. Check the engine oil dipstick for signs of an internal coolant leak. CAT C12 Coolant Manifold. Diesel Engine Crank No Start. Fabricator welder. Have counter bored more 3406s, c15 and c16 than I can remember but not c12. : DM5826-00 ©2015 … The engine oil will have a milky appearance if contamination from the cooling system is present. (pretty hard for the original poster to decipher, when guys lump all CAT engines into one category or design)C12 use a big, fat, tall band(rubber material) midway down into the block, then the outside of the liner has a slight taper to it(just above the liner flange/lip area), and when the liner goes downward(during installation), onto its midship, liner flange; that big, fat, tall liner band gets pushed outward AND downward against the block, to help seal it, PLUS, even if it did leak, THEN the coolant would also have to get thru the liner flange "seat area" or "lip" to even get coolant into the oil (This head is clamped pretty hard, with the fire ring and headbolt tension all pushing downward in that metal to metal joint. It was running fine and then we idle down and it made a loud noise and shut off. coolant must be moved through the engine in some fashion to achieve better heat transfer efficiency and to limit the possibility of overheating the coolant in the hottest parts of the engine. It’s hands-off and worry-free. did the work and told me o ring went bad on one liner and dumped antifreeze into oil. If the engine oil has coolant entering the coolant will go to the bottom of pan sump after sitting over night. I believe, its o-ring material is made to be in an environment of oil. The C12 is 50.6 inches long, 35.68 inches wide, stands 41.85 inches tall and weighs 2,070 lb. Drop sump, c12 sump gaskets are good to re use most times. When it got to about 170 F it lost preasure. Thread Starter. Check for excessive smoke (oil getting into the bores), coolant loss (coolant getting into the bores) and a mayonnaise effect in the oil (coolant getting into the oil) You don't say what car you have, but for quite a lot of vehicles, particularly older ones, that is a do-able job for a reasonably competant diy mechanic. Start with water pump, had same problem several years ago. C-12's don't normally blow compression into the cooling system, they leak coolant into the oil, always on the cam side. by Timothy Charlet on January 08, 2016 Vehicle Engine Mechanical Inspection Cost. Changed that and also cleaned the screen for the breather haven't had to add any antifreeze since and no slime in the fill tube or breather.. Don't know how many o rings went bad. (06-29-2019, 09:52 PM) oldgms Wrote: (06-29-2019, 09:27 PM) mili Wrote: Hi friends, I have a c15 acert engine which has a problem of engine oill leaks into coolant. $699.00 + shipping . It came back with … ours was loosing coolant this spring and ended up being the water pump. I use the T6 in my C13. Diesel Engine Oil for Cat® Engines Diesel Engine Oil for Cat® on-highway trucks, earthmoving, commercial, and marine diesel engines combines a high quality base stock with a proprietary, balanced additive system having a combination of metallic detergents, ashes dispersants and … CAT C-13 Engine Accessory Mount , Part # 222-2899 . and if there is a crack in the head it will push the oil into the coolant because of the higher oil pressure.In cases like this, #1 is oil cooler, then cracked head then head gasket, or … CAT C13 OIL IN COOLANT. Post: #1. talked to another cat mechanic, asked if the head gasket could cause the oil to get into antifreeze. i have coolant in my oil. It doesen't have any oil or coolant leakes that I can see, it starts easy and runs clean, with no smoke, and good oil pressure. Sdtruck12 Location Offline Senior Member Reputation: 343. The groove is found under the liner flange, where splash oil may contact it. To eliminate transmission oil cooler, bend and ziptie hoses to the trans cooler, change coolant and run the engine high idle for an hour. Since the introduction of the C12, CAT has also introduced a newer liner(a long time ago), that in addition these areas, there is now a single "D" style o-ring and groove on C12 liners. I would have checked that a long time before, I would have ripped the engine apart. Viewing a thread - Cat C-13 engine, good and bad. If someone else did this, they could be trying to reset your password, or it could be a mistake. got a c12 with some coolant showing up in the oil. BW turnover Ball. Retired, HD mechanic, worked on engines all my life. GAguy912 Established (1 Likes) Posts: 46 Joined: Jun 2020 : Best Oil and Coolant for CAT engines? Or, onboard construction technology that helps you get to grade faster, hit target payloads, and keep you safe. Heres the scenario: Gentleman brought us his used 2000 Freightliner, with a C-12 (million miles plus, supposedly inframed at 600,000) He complains that he saw signs of coolant at the blow-by tube. Good Clean Part. I was involved with a 6L71 that would put oil in the coolant, we checked the cooler, the head gasket everything they thought of. Well, I just recieved an new direction. Ive noticed a few months ago that I was getting a little bit of oil in the coolant tank in my peterbilt. "Some people are educated beyond their intelligence.". Cat 325 with 3126 coolant in oil. We dyno'd it and never got it to leak, he would take it out and call at Leduc saying it was blowing oil out. Joined: Jun 4, 2015 Messages: 31 Location: 08089 . C12 use a big, fat, tall band(rubber material) midway down into the block, then the outside of the liner has a slight taper to it(just above the liner flange/lip area), and when the liner goes downward(during installation), onto its midship, liner flange; that big, fat, tall liner band gets pushed outward AND downward against the block, to help seal it, PLUS, even if it did leak, THEN the coolant would also have to get thru the liner flange "seat area" or "lip" to even get coolant … Common signs include oil or coolant leaking from the oil cooler, oil getting in the cooling system, and coolant getting in the oil. View photos, details, and other Misc. Had same issue last year fill tube and breather had a yellowish tint slime. When replacement parts are required for this product Caterpillar recommends using Cat re- placement parts or parts with equivalent speci-fications including, but not limited to, physical dimensions, type, strength and material.