oil pressure

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genob2

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i just installed a guage for oil pressure in my car; Does anybody have the specs for the correct oil pressure? My manual does not have the low/high limits. With new rod bearing, my car, at idle, has 10-15 psi. Is this okay?
 

K-Dawg

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Sounds about right. Seems like its supposed to be about 12psi at idle hot, and about 10psi for every 1000 rpm after that.
 

genob2

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I guess the reason I'm asking is this;
When driving in traffic, the low oil pressure light will flicker at stop lights. Not all the time, just once in awhile. I just installed a new mechanical guage and a new oil pressure sending unit. When the light flickers, the guage reads 10+ psi. Which one is right?
 

K-Dawg

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You could try replacing the factory sender. Otherwise, you might want to get the rod bearings changed out before you have serious problems. Try doing a search on the sender and low oil pressure.
 

genob2

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we did replace the rod bearings. We just installed this engine last weekend. Is a mechanical guage more reliable than a pressure sensor? The sensor is also new
 

Sho Amo

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the pressure sender is a mechanical gauge. it is like the difference between a wideband a/f gauge and narrowband. the factory gauge just tells you when its under a certain psi or above it. your aftermarket gauge tells you the number in psi the pressure is.
 

Ishodu

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I believe the factory oil pressure sender is to close and send the light signal at 5 psi. Sounds like yours might be coming on with a higher pressure. I agree you should change it there pretty cheap.
 

93rev2sev

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I see you just changed your bearings AND your pressure sensor so I won't suggest either of those...lol

you just changed your bearings...what oil are you using?
 

genob2

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The engine that was in the car expired. Since the engine we bought had
150k, I elected to put new bearing in it before we put the engine back in. BTW, the bearing that were in there looked great for having 150k. I use 5w-30 right now as it still gets kind of chilly here in Minn.. The low light hasn't come one now for almost 2 days. Hopefully it won't.
 

sho_sc

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The engine that was in the car expired. Since the engine we bought had
150k, I elected to put new bearing in it before we put the engine back in. BTW, the bearing that were in there looked great for having 150k. I use 5w-30 right now as it still gets kind of chilly here in Minn.. The low light hasn't come one now for almost 2 days. Hopefully it won't.

The reason I asked is sometimes folks drive the SHO "knocking" with bad rod bearings. Heat builds up and does a number on the crank; then they just slap in a set of bearings thinking everything will be fine. But it looks like you may be o.k.
 
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