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Small block Chevy oiling question
Good friend of mine just rebuilt his SBC 350 with a one-piece block from Summit.
He just fired it up and noticed he's only getting 20lbs of oil pressure and none up to the valve covers. No bad lower end noises so it sounds like he at least has mains getting oil. Any tips on what he should look for and in what order? Obviously doesn't want to pull it and just start taking stuff apart. I don't know Chevy V8 well enough to even start guessing. He mentioned that the priming with a drill seems to spin really easy and never really loaded up, but the gauge did get to the same 20lbs. Car ran for about 15 seconds before shutdown due to oil pressure concern and pulled valve cover showed bone dry top end.
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Ken 1986 930 2016 R1200RS |
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07-21-2014, 10:02 AM
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Join Date: Aug 2000
Location: a wretched hive of scum and villainy
Posts: 55,652
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Pull the pan and pump. Make sure the oil pump pick-up is submerged.
Another hting to check is hte plastic coupler that connects the oil pump to the dizzy drive. Then it's time to check the oil bypass valve(s). 
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07-21-2014, 10:11 AM
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All the oil galley plugs installed?
Oil holes in cam bearings aligned with oil galleys?
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'80 RoW 911 SC non-sunroof coupe in Guards Red It's not a Carrera.... It's a Super Carrera! |
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07-21-2014, 02:49 PM
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Join Date: Oct 2003
Location: Michigan
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Is it an old SBC or a new style?
The oiling systems are very different.
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1981 911SC ROW SOLD - JULY 2015 Pacific Blue Wayne |
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07-21-2014, 03:00 PM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
Posts: 5,235
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Oil pump pick up too close to the bottom of the pan, cam bearings improperly installed, or plugs missing on rear of engine (of course oil would be leaking and dripping from the flywheel cover).
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"Too much is just enough." |
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07-21-2014, 04:24 PM
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1.367m later
Join Date: Feb 2002
Location: small farm town Iowa..........at last
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All of the above plus....15 seconds isn't enough time to fill the lifters and get oil to the top end on a SBC. I'd put in a spare distributor with the cam gear removed and run it up with a drill. Rotate the crank by hand untill you get oil to the top end.
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non velox ad propitiare, verisimile non oblivisci If it's not The Original Automotive Innovations and Restoration, then it's just hot AIR. |
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07-21-2014, 11:59 PM
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Join Date: Jul 2013
Location: Emerald Isle, NC
Posts: 503
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20 psi is acceptable at idle. 10 psi per 1000 rpm is kinda the rule on an SBC.
Carter |
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07-22-2014, 05:58 AM
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911 Turbo
Red
