Push Rod Length Problem? PLEASE HELP
Thread Starter
Teching In
Joined: Mar 2010
Posts: 49
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From: Connecticut
Push Rod Length Problem? PLEASE HELP I have a 1999 Camaro LS1 and I had both the heads on my car replaced with heads from a 1998 LS1. The casting number is 339K. The heads have new OEM valves and springs. I had brand new 7.400" push-rods in the motor, and valves were staying open when they should have been closed. The push rods worked fine in the heads I had replaced. What length push-rods do I need? The heads were shaved down, but did the 1998 heads have different push-rods? I need to order the right length, please HELP!
Specs on hardware:
2.00/1.550 valves, 130lbs at 1.800", 314lbs at 1.200", 65cc combustion chambers, GM blue springs
Specs on hardware:
2.00/1.550 valves, 130lbs at 1.800", 314lbs at 1.200", 65cc combustion chambers, GM blue springs
You need to either tell us exactly how much the heads were milled, or (gasp!!) spend $20 on a Comp length measurement tool and (gasp!!!!) take a measurement on your setup.
As stated above, you should measure.
However, as a quick check, put the motor at TDC for #1 and back off on the rocker bolt then tighten until zero lash. Once as zero lash, count turns to 22 lb-ft. This will at least give you an idea of how far off your are.
However, as a quick check, put the motor at TDC for #1 and back off on the rocker bolt then tighten until zero lash. Once as zero lash, count turns to 22 lb-ft. This will at least give you an idea of how far off your are.
Thread Starter
Teching In
Joined: Mar 2010
Posts: 49
Likes: 0
From: Connecticut
I cant visually tell exactly when the motor is at TDC, but I was able to see that number 1: no compression was present in any cylinder, 2: when the intake valve was open the exhaust valve wasn't 100% closed.
i turned the motor over by hand till the intake valve closed all the way and before the intake looked like it was moving i think that should work? that should be TDC on compression/power stroke i think..never went to school for this stuff just a shade tree guy ;p
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