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Old Sep 22, 2008 | 10:16 AM
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Cool Car Trouble!!

Hello All,
Im new here to Ls1 Tech I just joined up so if Im posting this thread in the wrong section please forgive me. I recently broke a valve spring on my LS1, the spring just snapped, didnt drop valve or anything. But I replaced all the valve springs this weekend, put car back together, starts and runs fine, valves are all adjusted perfecto, but the problem is, is that i can hear a lil pop in the exhaust, then after idleing for a bit, it sounds like a fricking cannon going off out my exhaust (literally scared the **** outta me) My ? is Why? Wtf could it be? All I know is before I figured it to be a broken valve spring (b/c car still ran, just ran for ****) I had the whole computer flashed, and lost my tune etc. So yeah Im rambling on, I think I got all the basics out there.... Help Me Out Thanks... By the way Im here in IL
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Old Sep 22, 2008 | 10:33 AM
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When you say the valves are all adjusted... are you running a solid lifter set up?
Also you may have bent the valve with the broke spring.
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Old Sep 22, 2008 | 10:40 AM
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Hydraulic lifters.... I was thinking maybe the valve was bent too... but I wanna make sure before I rip the whole motor apart once again..
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Old Sep 22, 2008 | 10:49 AM
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May wnat to pull that head and check that valve, also did you check to see if the push rod was bent? What springs did you put back in?
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Old Sep 22, 2008 | 10:55 AM
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I did check the pushrod before I even replaced the springs, b/c I have a spare set of heads I was just going to throw on, but the pushrod was fine so I figured valve to be fine. I put CRANE Dual Springs in Part #144833-16 which by the way if you ever change valve springs on a car use the CRANE Dual Spring Compressor... It worked well
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Old Sep 22, 2008 | 11:00 AM
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Did you use a hardened push rod with those springs or are you running the oem? If you have the oem's in there you need to get some harder ones.
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Old Sep 22, 2008 | 11:02 AM
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Pushrods Are hardened CRANE Pushrods
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