jstewart

In 2009 I installed Spin's 230/234 114 +2 cam and Comp Cams 26925 valve springs & 1779 retainers in my 08 LS3. Also changed the timing chain to a Katech IWIS-LSX at the same time. The car had about 11,000 miles when we installed the parts and has 23,800 miles now.
For the most part it has been driven conservatively with no track miles.

Question: with this cam and valve spring setup how often should the valve springs be changed as a regular maintenance item??

sevinn

I think the only way to really know is to check the pressures, but is the cost of the tool worth it compared to the cost of a new set of springs if it isn't something you plan to do more than once?

ErnieN85

call comp cams tech support.
race people change each year, however for street may be 75,000 miles?
best check with comp cams though

jstewart

I tried that and got a surprising answer. They don't know, even given the cam specs on the cam made by Comp and Comp valve springs.
Christ this is a street car not a race car, seems like they would have a general idea what the fatigue rate and average life on they're own valve springs is for a street application.

ErnieN85

pretty much what I thought valve springs usually hold up for the life of the engine. in most cases they are only changed because they have weakened and replacing them brings back some Hp.
usually the fatigue is caused by too much heat. they make a lot of heat when they are compressed and the released. they are cooled by the oil so the cooler your oil the better. street diving isn't hard on them at all

dev1360

20,000-30,000 miles is the generally accepted range for aftermarket springs on a cam. Many factors come into play and there is pretty much no way to tell.

needcheese

I have been by LG (LG motorsports)and ETMC (East Texas Muscle Cars) at 15k - 20k. A shop will charge around 3 hours labor to do a valve spring kit.