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Old 01-16-2013, 07:02 AM   #1 (permalink)
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oil pressure issue in my newly build engine

dear friends

recently i had my valve float which damaged my engine so i had my engine build and following are my stuff

darton sleeving
acl race bearing HX series
je piston
brian crower rods
commettic gasket
and full head build

but after installing my oil pressure guage the oil preasure show low after 2 ,3 runs which is about 150kpa on idle as manual recommends to have 250kpa and my crank and other things were perfect while build up so didnt bother to check the clearances as dont have expertise for special engine in my country, i am using mobil1 5w-50 please help
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Old 01-16-2013, 03:35 PM   #2 (permalink)
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When you rebuilt the engine, did you replace the oil pump (or clean the screen on the pickup on the old one?)
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Old 01-18-2013, 05:50 AM   #3 (permalink)
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i just cleaned my oil pump and added oil into and it seemed perfect
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Old 05-27-2013, 12:21 PM   #4 (permalink)
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Quote:
Originally Posted by hussam View Post
dear friends

recently i had my valve float which damaged my engine so i had my engine build and following are my stuff

darton sleeving
acl race bearing HX series
je piston
brian crower rods
commettic gasket
and full head build

but after installing my oil pressure guage the oil preasure show low after 2 ,3 runs which is about 150kpa on idle as manual recommends to have 250kpa and my crank and other things were perfect while build up so didnt bother to check the clearances as dont have expertise for special engine in my country, i am using mobil1 5w-50 please help
Hussam, yoiur idle oil pressure is fine. That converts to about 22psi. Most rebuilds will run lower idle pressure than what factory recommends. Mine runs 12-20psi.

What matter far more is if you oil pressure is running low while on track. That's what will kill your engine again. Unfortunately, there are no real good baffled pans on the market for our engine. Although Canton Racing will soon come out with one. You could look into the Accusump. That's what I ended up getting.

What's also important is using the proper weight oil. And you are definitely not doing that. The proper weight oil depends on your rod and main bearing clearances after a rebuild. Did you engine builder give you those values?

In the meantime, go back to the OEM recommendations. 50w is far, far too thick. You can damage things at the track with oil that is too thick also.

For a good oil education, got to www.joegibbsdriven.com
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Old 05-27-2013, 08:03 PM   #5 (permalink)
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Originally Posted by davidc View Post
Mine runs 12-20psi.[/url]
That's generally the operating range for my stock motor at idle.
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Old 05-27-2013, 08:03 PM
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