7.8L isuzu diesel oil in coolant.
2004 GMC 7Tf042. Isuzu 7.8L diesel engine. Oil in coolant. No coolant in oil. I'm a truck fleet mechanic and have three trucks with this problem. I have the engine oil cooler off and see no visible defects. If anyone has seen this problem and can lead me in a direction I would greatly appreciate it.
7.8 Duramax Oil In Coolant
IT'S LIKELY THE OIL INTER-COOLER / EGR MANIFOLD ASSEMBLY BOLTED ON THE SIDE OF THE BLOCK UNDERNEATH THE INTAKE MANIFOLD. I HAVE FACTORY SHOP MANUAL & IT DOES NOT ACKNOWLEDGE THE EXISTENCE OF THIS SIGNIFICANT PART - NOT EVEN IN THE ENG. TEAR DOWN SECTIONS. THE MOST LIKELY PART OF THE ASSEMBLY THAT IS LEAKING IS WHERE THE INTERNAL OIL RADIATOR LIKE SUB ASSEMBLY BOLTS TO THE HOUSING - THERE ARE 2 THERMOSTAT SIZED & SHAPED COPPER GASKETS THAT WILL LIKELY BE THE CULPRITS. SUGGEST PRESSURE TESTING THE INTER-COOLER ASSEMBLED & BROKEN DOWN (OIL RADIATOR REMOVED & ISOLATED). THE OIL RADIATOR HAS STUDS THAT PROTRUDE OUTWARDS TO EXTERIOR OF THE HOUSING IN WHICH YOU CAN SEE THE 14 MM NUTS- 2 TO THE LEFT OF CENTER & 2 TO THE RIGHT OF CENTER - THAT RETAIN IT. THE REST OF THE BOLTS ON THE EXTERIOR OF THE INTER-COOLER ARE THE HOUSING'S MOUNTING HARDWARE.:eek: RECOMMEND TO LEAVE 14MM NUTS INTACT UNTIL REMOVAL OF HOUSING SO AS TO BE ABLE TO INSPECT COPPER GASKET MATING AREA B4 DIS-ASSEMBLY.:) CHEV DEALER PARTS DEPT. DOES HAVE SCHEMATICS OF THIS ASSEMBLY & HAPPILY PRINTED THEM OUT 4 ME. ASSEMBLY COSTS $691.00 - BUT IT IS LIKELY YOU WILL ONLY NEED GASKETS & O-RINGS TO SOLVE PROBLEM. HAVE PICS OF ASSEMBLY REMOVAL STEPS ( DID NOT HAVE TO REMOVE FUEL PUMP) & BROKEN DOWN INTER-COOLER ASSEMBLY IF NECC. I'LL CHECK THIS POST EVERY FEW DAYS TO SEE IF YOU WANT ANY FURTHER INFO. 2004 CHEV T7500
2000 Isuzu FTR oil in coolant
Hello Tom
I just bought the used truck 2000 Isuzu FTR a month ago and now found out that I have oil in coolant. I noticed that you have this problem before. Can you be able to help ? I am not a mechanic but I am handy man, with your help I hope I can be able to fix it. I just flush out all the coolant and clean all the pipe and radiator and did the oil change as well. Please show me how to fix the leaking?
2000 Isuzu oil in coolant
Hello DieselTech04401
I have 2000 Isuzu FTR truck. Had oil in coolant, can you show me where the injector cups locate?