| denofiniquity | -- 10-13-2018 @ 11:09 AM |
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Hey guys, Assuming all is well with a new engine rebuild, how much oil pressure might I expect cranking the engine over with spark plugs out and no plumbing to an oil filter. The engine cranks freely. My guess would be the pump, as I am getting no more then 2-3 psi, using a known good mechanical gauge. Ready to fire it now.
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| cliftford | -- 10-13-2018 @ 1:05 PM |
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Based on that information it is too low. I would expect to see at least 40#. I would check the pressure valve first and then the oil pump. I would als0 talk to the person who rebuilt it if possible, to see if he used all new bearings, etc.
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| GK1918 | -- 10-14-2018 @ 4:05 AM |
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I would fire it up there is a lot of passage ways that have to be filled up before you get a "head" of pressure. Second turning over with a starter is very low RPM's and the cam & pump is half of that. Thats why all of our rebuilds its filled with oil all buttoned up except the front cover minus the cam gear. We spin the cam with a drill, (drill cam adapter) somewhere around 200 RPMs. Yes I see that 2 or 3 lbs that you are getting but when every thing gets filled up you better hang on to that drill when the pump gets loaded. Also during the drill process the engine is turned over by the starter cause all of the cam and crank passages have to get filled up. This is a positive test - not too late for you to do this. Hope your engine is still on the stand but can be done installed with out the radiator. Bottom line is, this way you see that gauge shoot up to 60lbs you will sleep tonight............sam
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| cliftford | -- 10-14-2018 @ 5:27 AM |
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I would agree with the last post. I was assuming you had already cranked it enough to fill the engine oil passages.
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