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Should I rebuild Chevy 350 Silverado?


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mmullm1
Novice

Aug 2, 2011, 3:16 PM

Post #1 of 9 (3138 views)
Should I rebuild Chevy 350 Silverado? Sign In

I have a '94 Silverado, 350, uses qt. oil every 3K miles, 156K miles, has had great maint. Runs fine, in the last year has had new starter and replaced leaking intake manifold. I am retired, fixed income, can afford to spend the 4K to get new longblock, at least now.
My great mechanic says the oil pressure at cruising speed is 35, at idle 10.
How long can I expect the engine to last, at least generally? I'm thinking of having the new longblock installed now, cause who knows what the future will bring. This will be my last vehicle, and I'd like it to last.


zmame
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zmame profile image

Aug 2, 2011, 3:38 PM

Post #2 of 9 (3128 views)
Re: Should I rebuild Chevy 350 Silverado? Sign In

I would try putting new pump in first might just be a pump on the way out. They are fairly cheap to replace.


Hammer Time
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Aug 2, 2011, 3:41 PM

Post #3 of 9 (3124 views)
Re: Should I rebuild Chevy 350 Silverado? Sign In

I don't know that a new oil pump is going to do anything for your oil consumption. Are you getting any smoking? If so, when?



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mmullm1
Novice

Aug 2, 2011, 4:04 PM

Post #4 of 9 (3121 views)
Re: Should I rebuild Chevy 350 Silverado? Sign In

No smoking, my mechanic says the main bearings are getting worn. He says the oil pump is fine. He's not pushing to replace the engine at all.


Discretesignals
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Aug 2, 2011, 4:14 PM

Post #5 of 9 (3119 views)
Re: Should I rebuild Chevy 350 Silverado? Sign In


Quote
How long can I expect the engine to last, at least generally?


Till the oil pressure goes to zero or the engine starts knocking. Drive it till it dies. You have the money saved up all ready. Get as much out of the old engine as you can. You'd be surprised how far you'll go on it.





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(This post was edited by Discretesignals on Aug 2, 2011, 4:15 PM)


zmame
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Aug 2, 2011, 6:31 PM

Post #6 of 9 (3097 views)
Re: Should I rebuild Chevy 350 Silverado? Sign In

Wouldn't really consider 1qt every 3k miles alot for consumption. Run thicker oil like a 15w40 that will help your oil pressure.. Also if you going by GM dummy gauge I would put a actual mechanical gauge in the GM gauges arn't very accurate.


(This post was edited by zmame on Aug 2, 2011, 6:32 PM)


mmullm1
Novice

Aug 2, 2011, 8:02 PM

Post #7 of 9 (3085 views)
Re: Should I rebuild Chevy 350 Silverado? Sign In

The oil pressure was measured by my mechanic with whatever gauges he used.
Thanks to everyone for your comments and advise. It was appreciated.


nickwarner
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Aug 5, 2011, 6:15 AM

Post #8 of 9 (3066 views)
Re: Should I rebuild Chevy 350 Silverado? Sign In

I have a 95 Suburban with the 350 motor. Has 250,000+ on it and was at about the same numbers for oil pressure and consumption. I run 15w40 diesel oil in it and my numbers are better. Not worried about rebuilding the motor. It'll run for quite some time longer.


Richard c
User

Aug 5, 2011, 9:15 PM

Post #9 of 9 (3054 views)
Re: Should I rebuild Chevy 350 Silverado? Sign In

Greetings, A new pump is an idea I'll go for. Make it a heavy duty one, more volume. I put one in an older chevy truck it made that motor so happy.






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