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Post by cm420 on May 21, 2005 19:34:37 GMT -5
Is it normal for a sbc that has the wrist pins run through the oil ring lands to use oil? I have noticed that after a 30 or so mile drive the oil level will be down about a half-quart. My old short block didn't use oil like this, but it was a shorter stroke 5.7 rod motor. Any one else see this happening with theirs?
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Post by Mike Stark on May 23, 2005 19:49:58 GMT -5
Big stroke motors can eat a little oil sometimes. I have never had one go through that much though. I would do a leak down on it and make sure the rings sealed good.
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Post by cm420 on May 24, 2005 9:48:19 GMT -5
thanks Mike; will do...
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Post by Wolfplace on May 25, 2005 0:52:26 GMT -5
Unfortunately, a leak-down will not normally show anything if you have an oil usage problem. In fact you will sometimes get better leak numbers  That said, I have a lot of engines with the support rail & they do not cause issues that I have seen. I have two "long rod" 489's in motor homes on propane, one of which I know has over 80,000 on it & it has no problems last I heard,,, Have you checked the simple things like the intake, rocker studs if they go into the ports etc. ? Last engine I had oil problems with was a 400 sb & ended up pulling it apart, ball-honing the cylinders & throwing rings in & it cured the problem but I to this day do not know what caused the problem for a fact,,, |
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Post by cm420 on May 27, 2005 11:21:23 GMT -5
thanks Mike; haven't looked into anything yet. I did have an intake leak on one several years ago, but that ended up being a machining defect on the mating surface of the intake. This intake has been on a few different motors with no problems. That being said, it is still a possibility,though. Was really wondering if the support rails have caused anyone any issues like this, as this is my first motor that uses them. Thanks again...
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