hydralic roller lifter Problem...how to diagnose?
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Sorry, but "loose again" and "noise" are two different things.What I was understanding was the valve lash was losening up. And my 87 has never seen 25 lbs oil pressure,at idle I hold no less than 35-40 using 10W30- so it's possible the hydraulics may not be getting enough oil at idle. Now I'm begining to agree with some who suggested trying a heavier weight oil. Just my thoughts.
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Drifting
Joined: Oct 2003
Posts: 1,594
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From: CALGARY ab
Originally Posted by rick lambert
Sorry, but "loose again" and "noise" are two different things.What I was understanding was the valve lash was losening up. And my 87 has never seen 25 lbs oil pressure,at idle I hold no less than 35-40 using 10W30- so it's possible the hydraulics may not be getting enough oil at idle. Now I'm begining to agree with some who suggested trying a heavier weight oil. Just my thoughts.
you know rick to tell you the truth i am not exactly sure what the idle pressure is.as matter of fact i would install a test guage to yours..some of the oil pressure sensor can be crossed and you may have the wrong one.
nor would i think that new 55HP oil pump would fail..
What is IMPORTANT. THE FACT IS that the lifter lose thier prime at IDLE..
any way back to the subject: the problem will be elimninated by sunday nite.. new comp 850-16 . Mopac performance has replaced all 16, and provided new head /intakees gasket for my trouble..i had them tested and found 4 defective
and that's the end result
Last edited by korvette4u; Mar 4, 2005 at 06:40 PM.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by korvette4u
you know rick to tell you the truth i am not exactly sure what the idle pressure is.as matter of fact i would install a test guage to yours..some of the oil pressure sensor can be crossed and you may have the wrong one.
nor would i think that new 55HP oil pump would fail..
What is IMPORTANT. THE FACT IS that the lifter lose thier prime at IDLE..
any way back to the subject: the problem will be elimninated by sunday nite.. new comp 850-16 . Mopac performance has replaced all 16, and provided new head /intakees gasket for my trouble..i had them tested and found 4 defective
and that's the end result
nor would i think that new 55HP oil pump would fail..
What is IMPORTANT. THE FACT IS that the lifter lose thier prime at IDLE..
any way back to the subject: the problem will be elimninated by sunday nite.. new comp 850-16 . Mopac performance has replaced all 16, and provided new head /intakees gasket for my trouble..i had them tested and found 4 defective
and that's the end result
Jake
Thread Starter
Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
Originally Posted by JAKE
So what's the latest on solving your problem. Inquiring minds . . .
Jake
Jake
thanks jake,
ps: smack123..came over the other nite.. he and I check out his A/C Altinator problem...which is ok, then it was time for a few of
..had great visit and exchanged tall stories
Thread Starter
Drifting
Joined: Oct 2003
Posts: 1,594
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From: CALGARY ab
Originally Posted by JAKE
How much spring pressure are you running? Too much valve spring pressure will cause hydraulic lifters to collaspe.
What was the brand of the lifters that failed?
Jake
What was the brand of the lifters that failed?
Jake
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by korvette4u
comp 850-16 HR L, crane 981-16 102lbs...heres the deal changed spring on 87 works fine, used same components in 89 with new lifters not fine
I read a mag article recently where a CompCams HR lifter failed and the Comp Tech said they'd had a few other problems with the same lifter part #. Not positive, but I don't believe Comp makes their own lifters. Seems to me I've read that there are only about two companies that make them.
A while back, one of them went out of business or something similar and there was a nationwide shortage of HR lifters as a result.
Jake
