Quote:
Originally Posted by getarz4u15ster
According to your pictures.. looks like you had valve springs replaced.. GREAT.. on the other hand what spring set did you buy?
There were two contributing factors to my failure.. one caused the other i believe.
#1... When i put the springs on (didn't know at the time) the outter spring wasn't sitting completely flush with the spring seat. Why you ask.. come to find out the kit that comp sells for for our cars require the spring seats to be cut to correct diameter but doesn't say that in their spec sheet. Now we aren't talking a a huge gap between where the spring sat, and it actually resting on the spring seat however its enough to cause coil bind at even moderate rpm ranges. Instead of my getting my .630 lift on my exhaust site.. i was only seeing about .525 of it... (according to the machinist that took my head and redid after "the incident".
#2 Once i found out i had coil bind on every single valve.. it would stand to reason that the added stress all the way through the valve train (Cam, pushrods, lifters etc... put even more stress on cam pin (that is only used for alignment purposes anyway, because the bolt couldn't sit flush with the cam gear) cause it to loosen and shear off, the rest... well you know.
conclusion for me at least.. it was a combo between lack of information on the spring seat info (comps diameter specs show stock numbers), and a pin that was a couple thousandths to long... the combination of the two caused the pain. I feel for ya dude.. however we have learned some valuable lessons... if you want to be safe go with the following..
Three Bolt cam
Three Bolt cam gear (got mine from LFP) which comes with the LS2 chain tensior (another weak point in the LS3)
Katech's C5-R chain
XFI series cam (ramp rates are a little slower than the LS-R cam line (but better overall spring life).
A good set titanium springs, locks, and retainers (i have patriot .660's)
and while your at since you have to get a new short block anyway... (just build the bottom end forged.. =O)
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Wow so there springs at 2X the cost need spring seats to be cut, And it does not say that any where, glad i did not buy a cam from them or springs.