1999 350 cu inch GMC V8

Solittle

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Apr 28, 2002
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What is an acceptable oil pressure reading for this engine when at operating temp?
 

Reel Poor

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Jan 29, 2005
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Re: 1999 350 cu inch GMC V8

Idealy...25 at idle to 45 off idle. With a minimum of about 15 at idle. Oil pressure light will light at 8psi and under.
 

Bondo

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Re: 1999 350 cu inch GMC V8

A Good rule of thumb is,........<br /><br />10psi per 1000rpms..........<br /><br />This holds true for Most engines.......
 

Bob_VT

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Re: 1999 350 cu inch GMC V8

Oils pressure is best read via a mechanical gauge I have little to no faith in the electronic sending unit ones.
 

Solittle

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Re: 1999 350 cu inch GMC V8

Thanks to all.<br /><br />I have no problems with the engine at this time. The reason I posed the question is this is the first vehicle (99 Yukon)that I have that had an oil pressure gage rather than an idiot light.
 
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