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06-28-2005 05:24 PM #1
using oil
Well I have now about 7057 miles on a gm crate engine 290 horse 350 cid. And my question is this .... Is 1 quart of oil every 3000 miles acceptable? It seems that the engine should have broke in by now. The number 7 plug drivers side back has developed some deposits on it also, this motor is still under warreny so what should I do? the motor runs ok no miss / backfire etc. It has no leaks anywhere it must be burning it. Sure hate to take it out again. Thanks for the imput guys!!!!
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06-28-2005 05:58 PM #2
When there is a warranty make sure u have a paper trail, in case that oil consumption doesnt stop. I think that amount is excessive but the only way to protect yourself is to take it back, to the builder and let them decide what to do.Choose your battles well===If it dont go chrome it
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06-28-2005 07:51 PM #3
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06-28-2005 08:04 PM #4
Depending how it was broken in, that could be deemed normal oil consumption by a rebuilder when you're talking warranty. Sure it's not leaking instead of burning?
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06-28-2005 08:25 PM #5
I have had quite a few engines that would suddenly drop one qt at 3000 miles. I would then change the oil, filter, and go another 3000 miles. I do not actually consider that all that unusual. I have had quite a few new engines do similiar things.
Is there another reason you might be questioning the rebuild? It might be me, but I consider 3000 miles time for a change anyway. That has always been my way. My new 383/350 does the same thing. 3000 miles, down about one qt. I feel pretty comfortable with that.
The vaccum leaks I had to chase are another story. Sloppy fittings, line ends, warped carb base. The oil was quite in line withe what I consider "normal".
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06-29-2005 06:23 AM #6
well went today and checked all the plugs and the only one in question was number 7 with deposits on it. Can a leaky intake cause oil cumsumption? just a thought?
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Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
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