I have a mild cam and have patriot dual valve springs. How long would these normally be good for?

I bought the car 1 month ago and the previous owner put about 10000miles on the cam/spring set up.

Thanks

 

Only way to tell condition would be to remove and test and even then you can't predict breakage.

 

I agree. For peace of mind, replace all of them.

 

This is strange; I thought the whole reason for going from single beehive spring to a double was protection for a spring failure. If this is true, why change them to just change them?

 

I put a little over 50k miles on my Patriot dual golds with a 224/230° XFI lobe cam. Back in the summer I noticed my mph was down at the dragstrip, and after I replaced the springs it is back up to 95.8 mph in the 1/8 mile. I may have been pushing my luck with that many miles and .60x lift. Considering the low cost of 16 replacement spring sets, it would be a good move on a car you don't know the full history on. I would be more worried about sustained high rpms and banging off the rev limiter than 10k miles.
I bought an in-car spring compressor tool from a guy on LS1Tech (Tim's Tool). It's basically a flat plat and a stud. For $35 it is a pretty inexpensive compressor, and it works well enough - just one spring at a time. I recommend having a few spare valve locks on hand - just in case. And stuff a rag along the top of you exhaust manifolds to keep parts and tools from falling...

 

I replaced all my stock LS 6 springs out a few weeks ago. Bought the car new. Has 13K miles on it.


Did the job myself. No labor charge!!

Too many horror stories in regards to valve spring failure.

As a matter of fact, there is a story today here on the forum
in this regard. Spring failure caused engine to puke. It was a 2002 Z 06 w/ the LS/6 motor.

 

Chevy 406, thanks for info on the tool. It was an easy search. Thanks!