Quote:
Originally Posted by gmc684x4
Why such a thick oil ?
Most guys i know run 10/40 or even 5/30
20/50 is a diesel truck oil
Do you have headers?
Are they loose
Have you used comp cam lifters i have heard there fairly noisy
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I tried 5/30 and oil pressure dropped to 25 when it got warm.
I have cast manifolds and yes I hear a slight exhaust leak which I am going to address this weekend. But that should not make it idle rough as the noise increases or am I wrong ? Bolts are very tight.
Standard melling brand Hydraulic lifters. Started with a chinese brand which I swapped already as at first a few would not pump up.