pmolitor Posted June 15, 2012 Share Posted June 15, 2012 My 79 rs has an endt 676 300hp manufactured in 1984. it seemed to have more oil on the outside of the motor than inside. I can add a gallon of oil, drive 300 miles, drain 2 quarts out of the air tanks and refresh oil all over the engine and frame and ground. the blowby isn't bad. nothing out of the fill tube or dip stick. Any ideas? Quote Link to comment https://www.bigmacktrucks.com/topic/25697-leaky-engine/ Share on other sites More sharing options...
1958 F.W.D. Posted June 15, 2012 Share Posted June 15, 2012 You sure it doesnt say "Detroit Diesel" on the valve covers? 1 Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/25697-leaky-engine/#findComment-124089 Share on other sites More sharing options...
Freightrain Posted June 15, 2012 Share Posted June 15, 2012 Sounds like your air compressor is toast. Putting that much oil in the tanks in that short of time, not good. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/25697-leaky-engine/#findComment-124092 Share on other sites More sharing options...
pmolitor Posted June 15, 2012 Author Share Posted June 15, 2012 Beginning to think it's a Harley! I'm on my third air compressor in 4 years. all do the same thing. Quote Link to comment https://www.bigmacktrucks.com/topic/25697-leaky-engine/#findComment-124099 Share on other sites More sharing options...
JumperAndSon Posted June 15, 2012 Share Posted June 15, 2012 Awww man, I thought for sure this was going to be a thread about a Detroit. I'm dissapointed. Ben Quote Link to comment https://www.bigmacktrucks.com/topic/25697-leaky-engine/#findComment-124100 Share on other sites More sharing options...
jzack Posted June 16, 2012 Share Posted June 16, 2012 I'm having a similar problem with my E-7 350, getting alot of oil in my air dryer even with a new compressor. Where does you compressor draw air from? If it draws before the turbo, while on boost it could be sucking oil past the pistons in the compressor. This wasn't the issue in my case (still havn't figured it out) but heard it is more common on older motors. Quote Link to comment https://www.bigmacktrucks.com/topic/25697-leaky-engine/#findComment-124129 Share on other sites More sharing options...
pmolitor Posted June 16, 2012 Author Share Posted June 16, 2012 I've changed it to draw from the intake manifold. this is getting frustrating. Quote Link to comment https://www.bigmacktrucks.com/topic/25697-leaky-engine/#findComment-124143 Share on other sites More sharing options...
BakerSmith Posted June 16, 2012 Share Posted June 16, 2012 It seems the gasket that connects the air pump housing to the cam tower is a very likely culprit. Fixing the leak is the best thing . You can use oil to temporary fix the leak until you get it fixed Quote Link to comment https://www.bigmacktrucks.com/topic/25697-leaky-engine/#findComment-124147 Share on other sites More sharing options...
rsb502 Posted July 29, 2012 Share Posted July 29, 2012 could be pulling oil past the seals in turbo then compressing oily intake air, on top of bad rings in the compressor the compressor just about has to be the culprit. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/25697-leaky-engine/#findComment-131079 Share on other sites More sharing options...
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