LOL !ģlubricating oil cooler do not think it is leaking, but I do not think that would give me white smoke in the exhaustĤ head gasket leaking, probable but after only 3-4 hours run time? It is brand new and torqued correctly. I used an 855 Cummins this evening to drag in some firewood. Also threads like this help jog the memory, It's hell getting older I have 4 of these engines in use but I don't work on them on a daily basis so as time passes on my memory gets foggy and find myself reaching for the book when we do work on one of them. If you plan on keeping the truck & working on the engine in the future I highly suggest this book.
#Small cam 350 cummins oil cooler cracked#
ħ Cylinder liner cracked / porous or bottom O rings leaking This is the order that Cummins recommends tracking down the symptom of internal coolant leakage in the 855ġ air compressor cylinder head cracked, porous, or gasket leaking. I think your close to finding the trouble. It's different without the sights, feel, smell & sound of the engine.
talk soon RalphĬlick to expand.Yes, it can be frustrating trying to diagnose a problem over the internet.
I will check the smoke smell and continue investigations. Everyone gives me different directions but nothing in any type of order very confusing. I have to fix this truck but I am an Electrician with a decent amount mechanical experience, but I need a lead to problem solving this. I do not think these gaskets would leak that fast the truck only has maybe two hours of run time since repair. To me that is a sign of a cracked head allowing compression into the crankcase, the head gaskets are all new and sequential torqued to 315 ft lbs. The white vapor puffs out of the dipstick tube and the oil filler tube as if is a locomotive. The thing that baffles me is vapor coming up out of # 1 valve body over # 1 cyl, # 2 nothing. It does not stop smoking and give it fuel and wow the smoke is amazing. Thanks td actually when cold and at idle slightly black smoke, if you rev up the engine it turns white and gets worse really bad when warmed up. Can anyone tell me what checks I can do before I tear the top half off again. I feel the machine shop did not check the heads properly, and # 1 is cracked. Rear breather spiting out small amounts of the white cream I mentioned before. Also water vapor droplets on valve cover.
Took valve cover off 1&2 cylinder, head loads of white cream in the section above # 1 piston, ran engine and noticed vapor coming up out of section above # 1 cylinder. Brought engine up to operating temp 180 smoke went away but came back while driving. Changed the injector, started up again much better but still smoking like a train. Took non contact thermometer and measured exhaust temp at manifold ,found no 1 not firing. Fired up the engine it sounded horrible, like a rap in the first cylinder but went away as you increased the rpm's. I put the engine back together and set injectors and valve lash. sent heads out supposedly pressure tested one was leaking through the injector seat, had all six changed, heads surfaced and rebuilt valve job, valve guides etc. The three head gaskets looked ok not blown through. I have 1978 855 NTC that is smoking badly, the truck overheated and was blowing heavy white smoke, so I took apart the top of the engine and had the heads checked. Hi really need some help with my cummins engine
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