Buddha 2012-02-26 21:50:31
I have a 1987 silverado that I just put a mechanical oil pressure
The problem that I m having is that when I first start it the oil
at 40. The more it warms up the more the pressure drops.Eventually it
will drop to almost 0. My question is what causes this and how do I
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Big al 2012-02-26 23:51:06
What engine and how many miles?
Steve w. 2012-02-26 23:51:10
Oil pressure drop while the engine warms up is normal. The oil is
getting thinner and easier to pump as it heats up.
However 0 is NOT a good number on an engine. How many miles are on the
engine and what oil are you using.
On a small block you would like to see about 15-20PSI at idle with
pressure increasing by 10PSI every 1000 rpm or so.
Arnie quarry 2012-02-26 23:51:38
A friend of mine tried an unconventional fix that worked on his Silverado.
He took the special sand from an hourglass, poured it into the engine oil
and then the pressure stayed at normal level, even when the engine is
Sam 2012-02-26 23:51:40
Stupid is as Stupid does
** Posted from http://www.teranews.com **
WOW, Stupid is right. I've NEVER heard that one before. Besides most of that so called Special sand would have been filtered out before it even went into the Engine I would think. Other then being Dumped on top of the rockers and other things on the top of the head before draining down into the oil pan to be sucked up by the pump and to the filter before entering into the rest of the engine.
Shelldigger 2012-02-26 23:51:49
The first thing Id want to do is verify the results with another guage. Why did you replace the guage in the first place? Was the idiot light coming on before the replacement? If another guage verifies your results then you probably need to pull the crank and do a bottom end job/new bearings/turn crank. With an engine as old as yours, and I suspect a lot of miles, you may want to just go ahead and get a crate engine, because once you get that far into an engine for a "fix" you may as well, in most cases, rebuild the entire engine. Either way you are probably looking at an expensive fix. If perhaps the engine isnt using oil/plugs burning clean/ you may get away with just a bottom end job for a good long while, thing is by the time the crank bearings need to be replaced, the rest of the engine is just as worn and a quick fix of one symptom is followed by the need for another. You may prolong the bottom end job by using a heavier guage oil and perhaps use some STP or other engine oil enhancement. No guarantees there, but it can and does help in some cases. The guy who picks up my trash has an old Ford POS pick up truck, and the oil pressure guage reads zero on it too, still drives it every day...engines are like tires....you never know when they are going to go.