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Grumpy
08-16-2005, 12:16 PM
Hey gang!! have 2. an 80, restored, and a DD 92 LT1 w/loud lifter noise and a "strange" problem with door/light "chimes". It works when I have heavy sun-load. Need to adjust those lifters, anyone out there with experience?? Are they the same as all the old small blocks??
gettinthere
08-16-2005, 12:17 PM
:hello:

Moving to LT1 tech
Lifeisgood
08-16-2005, 01:53 PM
if you have an LT1, there really isnt an adj. for the lifters, theres a valve lash adjustment.
if its the lifters making the noise they may be clogged, and you might want to replace/ clean them. but probably replace.they are hydrualic roller lifters.
im guessing this is a high mileage engine?
Chris 96 WS6
08-16-2005, 01:56 PM
if you have an LT1, there really isnt an adj. for the lifters, theres a valve lash adjustment.

Its the same difference...the adjustment is to the pre-load on the lifter plunger. ;)
Fastbird
08-16-2005, 01:58 PM
Its the same difference...the adjustment is to the pre-load on the lifter plunger. ;)

:withstupi What he said.
1970judge
08-16-2005, 04:16 PM
Maybe im the only one who didnt comprehend the statement?
transamtom
08-16-2005, 04:42 PM
Maybe im the only one who didnt comprehend the statement?

No not the only one.
Bawls
08-16-2005, 04:53 PM
Hey gang!! have 2. an 80, restored, and a DD 92 LT1 w/loud lifter noise and a "strange" problem with door/light "chimes". It works when I have heavy sun-load. Need to adjust those lifters, anyone out there with experience?? Are they the same as all the old small blocks??


The easiest way I've found is to start the car and slowly turn each rocker nut till they quiet down.
Chris 96 WS6
08-16-2005, 04:55 PM
Move the cylinder to TDC, then adjust the rocker down until the pushrod doesn't move up/down any longer (zero lash), then add 1/2 turn.
Lifeisgood
08-16-2005, 07:37 PM
the pre-load for the lifter preload, is basically letting the lifters soak in oil, upside down. atleast thats what the proceedure they gave us at school
Fastbird
08-17-2005, 07:09 AM
the pre-load for the lifter preload, is basically letting the lifters soak in oil, upside down. atleast thats what the proceedure they gave us at school

I'd think of that as more of a "pre-pump" than a pre-load. Think about it. You're not putting any load on the lifter at all by soaking it in oil, you're just pre-pumping the lifter (allowing it to fill to capacity with oil). Once you have your valve lash set, the ensuing pressure being exerted on the lifter at that point is the pre-load.
Grumpy
08-17-2005, 08:38 AM
Hey guys!! Got it!! I was, wrongly I might add, thinking that there was something different in an LT1. Thanks much!!!