08-21-2013, 01:37 AM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
Quote:
Originally Posted by Gaz64
Your pressure is not that bad to worry about.
Your pressure is pump volume minus all the internal "leaks", the pressure is lower all at rpms now because the bearing clearances are slightly larger.
It was probably on the tight side of clearance when it was built.
Pressure without flow is more than likely to fail than higher flow from lower pressure.
10000 miles in 10 years, how many oil changes has it had?
Your bearings could be wearing out chemically from acid in the oil.
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Quote:
Originally Posted by Guy Johnson
I removed the valve covers and Found one of the push rods not even close the the rocker arm.
I am not sure how to remove the rocker arm. Here is a picture.
Star style nut with an allen screw. What is the procedure on how to unlock these?
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Guy,
Loosen the 12 point locknut, wind out the setscrew/pushrod cup seat to set valve lash, lock the locknut.
The amount of "screw" out of the nuts are different for what I can see in the photo.
This tells me your adjustment procedure/preload is not the same for all valves.
Can you also give some info to my questions, and why you believe a roller lifter has failed.
__________________
Gary
Gold Certified Holden Technician
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