JoeliusZ28
11-17-2008, 09:17 PM
alright i apologize i am kinda asking the same question again (from this thread: http://ltxtech.com/forums/showthread.php?t=1433) but I REALLY want to make sure i do this right.
First Question:
When adjusting the rockers via the engine-running method, what is the starting point for measuring the ammount of pre-load?
Having never done this before I had assumed that lifter rattle would go away at the same point as "zero lash" and that didnt happen. The rattle didnt go away until about half a turn past the point i needed pressure to turn the rocker bolt. My friend says to pre-load past the point that you stop hearing noise. Is this correct or is zero-lash correct? What made me further unsure is that the sound of the lifter wasnt a fine-line adjustment like i thought it would be.
Second Question:
How can i tell if I have a collapsed lifter?
I originally adjusted my rockers 1/6 turn past zero lash and drove it that way for about 1000 miles. The "sewing machine" noise seemed to increase over that time, but it never got to the point it sounded like a problem. (it was quiet at first).
The car has been in storage for 2 months and when i started it this weekend i immediately noticed a pretty substantial rocker knock on the driver side. Im not 100% positive but it seemed as though the front two rockers had substantial slack, however the locks were still tight. That being said... just about every rocker seems slightly loose, but not as bad as these ones were. It definitely wasnt like this when i parked it, does the cold have an effect on lifter bleeddown? our pole barn was probably about 50 degrees on the inside.
First Question:
When adjusting the rockers via the engine-running method, what is the starting point for measuring the ammount of pre-load?
Having never done this before I had assumed that lifter rattle would go away at the same point as "zero lash" and that didnt happen. The rattle didnt go away until about half a turn past the point i needed pressure to turn the rocker bolt. My friend says to pre-load past the point that you stop hearing noise. Is this correct or is zero-lash correct? What made me further unsure is that the sound of the lifter wasnt a fine-line adjustment like i thought it would be.
Second Question:
How can i tell if I have a collapsed lifter?
I originally adjusted my rockers 1/6 turn past zero lash and drove it that way for about 1000 miles. The "sewing machine" noise seemed to increase over that time, but it never got to the point it sounded like a problem. (it was quiet at first).
The car has been in storage for 2 months and when i started it this weekend i immediately noticed a pretty substantial rocker knock on the driver side. Im not 100% positive but it seemed as though the front two rockers had substantial slack, however the locks were still tight. That being said... just about every rocker seems slightly loose, but not as bad as these ones were. It definitely wasnt like this when i parked it, does the cold have an effect on lifter bleeddown? our pole barn was probably about 50 degrees on the inside.