Stock ls1 lifter preload??
#1
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Stock ls1 lifter preload??
I'm installing a 230/236 540/540 110 cam in a 04 gro with an 03 block with stock ls6 heads. The stock ls1 pushrods r a bit long. How much can I preload the lifers. I want to be safe.
If I didn't mention anything aftermarket then it's stock
Thanks
Anthony
If I didn't mention anything aftermarket then it's stock
Thanks
Anthony
#5
Stock lifter's should be 0.060 preload as I recall. LS7 lifter's can handle a bit more.
I've never had my car so quiet out front as I did this weekend getting proper preload on my lifters. You have to strain to hear lifter noise over the exhaust note of my car now.
I've never had my car so quiet out front as I did this weekend getting proper preload on my lifters. You have to strain to hear lifter noise over the exhaust note of my car now.
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#9
Pre-load varies with lifters.
Stock LS1's were 0.050 to 0.080 with 0.06 as ideal.
The LS7 lifters were a little taller in the cup allowing a bit more pre-load to be used.
Running more is not necessarily quieter. I ran 0.09~ and had terrible lifter noise on long cruises and at the end of 1/4 mile runs. I started with 0.08 as recommended by a vendor, went to 7.4 (0.09~ preload), now backed down to 7.375 now with ~0.07 preload.
Valvetrain is near silent now.
Stock LS1's were 0.050 to 0.080 with 0.06 as ideal.
The LS7 lifters were a little taller in the cup allowing a bit more pre-load to be used.
Running more is not necessarily quieter. I ran 0.09~ and had terrible lifter noise on long cruises and at the end of 1/4 mile runs. I started with 0.08 as recommended by a vendor, went to 7.4 (0.09~ preload), now backed down to 7.375 now with ~0.07 preload.
Valvetrain is near silent now.