Engine oil leak diagnosis - Help
I've put 3000 miles on my motorhome with its "new" 1st gen Cummins and it runs really good. At the outset I've noticed a few small leaks (engine, power steering, etc.) but postponed addressing them so I could first address drivetrain performance issues.
So now i'm looking at the engine oil leak and I can see oil coming from two places (feeling/looking from under the vehicle): 1) down below - passenger side surface of the gear cover toward the bottom, and 2) Up high - passenger side top ledge of the gear cover (I can only feel the oil with my fingers). . It looks like the oil coming from above is oozing down into what I see down below. Of course, it's annoying as the oil ends up at the oil pan and drips on the floor/ground. Anyway, prior to swapping the engine, I did R&R the crank front seal, religiously following the instructions, using a Cummins seal kit and Felpro gasket instead of RTV. Other than a possible front seal leak, what other sources of leak from high up in front of the engine? |
Oil cooler?
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Not sure with out looking at it. But if you want I have tons of oil traced dye. If you need some pm me and we could meet up some where.
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Originally Posted by cougar
(Post 2954970)
Oil cooler?
There's no oil seepage around the oil filter/cooler. |
Originally Posted by ClassA4x4
(Post 2954959)
Other than a possible front seal leak, what other sources of leak from high up in front of the engine?
The other place up high is possibly the head gasket on the front driver side, I've only seen this once and it was on my own truck that was turned up. |
Originally Posted by JD730
(Post 2955118)
. . . One is the front timing cover to block gasket has shifted and is now leaking, . . .
. . .The other place up high is possibly the head gasket on the front driver side, I've only seen this once and it was on my own truck that was turned up. As far as the front driver side head gasket is concerned, it is completely dry on the driver-side of the entire engine, from what I can tell from under the vehicle; I will be able to confirm when i take down the entire front accessories (fan, radiator, belt, intercooler, condenser, oil coolers, etc..) :-( sigh |
Problem solved
The culprit are 4 loose bolts of the gear cover, below and above the engine speed sensor - the exact location where i suspected. I must have been distracted when i was fiddling with the sensor gap 10k miles ago.
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So you snugged up those 4 bolts and your back in buisness? Gotts love those easy fixes.
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Originally Posted by thrashingcows
(Post 3037793)
So you snugged up those 4 bolts and your back in buisness? Gotts love those easy fixes.
I still have not put things together as i will be replacing the belt tensioner assembly to solve the cricket/squeak noise when the engine is cold. |
My cricket departed when I replaced the serpentine belt. I've since found debris in the grooves of my crank and alternator pulleys which may have contributed some noise.
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Originally Posted by ppiggppenn
(Post 3037886)
[SIZE=3]My cricket departed when I replaced the serpentine belt. I've since found debris in the grooves of my crank and alternator pulleys which may have contributed some noise.
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