Loud Ticking noise from TSP LS2 402
10-30-2009, 05:19 PM
#21
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Preload Ok, I am gonna go get a pushrod length checker, but I found something interesting, I can turn the pushrods on the valves that are closed, is that normal, or is that a indicator of to small of pushrod lengths?
10-30-2009, 06:17 PM
#22
To short. Not enough preload.
Follow Matt's advice on the pushrod length & preload....it is the last thing I do with a build is measure for proper preload and then pick the correct length. Rarely is what the cam manufacturer recomends the correct length.
10-30-2009, 06:51 PM
#23
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You don't need a length checker. It sounds like you are right a zero lash and your pushrods are .025"-.050" too short. Since you have a known length pushrod you can use the method above to get the correct length.
Hope this helps.
Shane
10-30-2009, 09:04 PM
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Definitely too short. I have a method posted here: See post #3... https://ls1tech.com/forums/generatio...s-too-big.html
You don't need a length checker. It sounds like you are right a zero lash and your pushrods are .025"-.050" too short. Since you have a known length pushrod you can use the method above to get the correct length.
Hope this helps.
Shane
You don't need a length checker. It sounds like you are right a zero lash and your pushrods are .025"-.050" too short. Since you have a known length pushrod you can use the method above to get the correct length.
Hope this helps.
Shane
10-31-2009, 07:17 PM
#26
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Pushrods I removed the 7.4s and installed one with one rocker arm, and at first I could not turn it with my fingers then once I torqued it two 22 ft lbs and checked it again, I could turn it. is it normal for the lifter to decompress like that? and would that still indicate not enough preload, trying to get ahold of a 8" caliper so i can measure the checker and add preload, but from what i am seeing it looks like I will need a 7.425 or 7.450
11-01-2009, 12:18 AM
#27
7.450 would be on the money. Try that and see if the noise goes away.
Also, are you saying that once the motor is warm you're seeing between 10-20psi oil pressure?
If so, that seems awful low. Did you put in the higher pressure spring in your oilpump? I like to see around 30-40 psi warm at idle. What weight oil are you running?
Also, are you saying that once the motor is warm you're seeing between 10-20psi oil pressure?
If so, that seems awful low. Did you put in the higher pressure spring in your oilpump? I like to see around 30-40 psi warm at idle. What weight oil are you running?
