Re: oil pressure gauge

Posted by frankiee on July 03, 2005 at 04:47:48 from (69.198.194.170):

In Reply to: oil pressure gauge posted by Dan Mitchell Tupelo, Ms on July 02, 2005 at 19:25:52:

If it has been sitting for a while then the rings could be stuck and might work free with running. That could cause the blowby.
If it has been sitting the oil pressure releif valve could be stuck. That is a valve that controls the max. oil pressure. Under spring pressure it will open a varing amount, bypassing the filter and back to source.
I was selling a car engine from a scrap yard once and the engine ran like a new one every day.
My employer put the engine in to the customers car and it ran horrible with noises and no oil pressure. He got me to check it out and It ran great with lots of oil pressure. He took a look at it and could not beleive it. We figured when I took the engine out a piece of crud dilodged and held the relief valve open when he had it going. Then it disolved or worked its way free and the engine ran like new again.
I am sometimes hesitant about recomending putting new detergent oil in a old engine but sometimes that is what it takes to break that old stuff out of the way. Change the oil shortly after.
Has the engine been sitting for a long time?

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