AndyCLT1

About 1,200 miles ago I did all the mods in my sig. I was noticing a lack of power at high rpm's. I was told that I should readjust the rocker arms as I had them adjusted according to my factory service manual(1 full turn past zero lash). I changed that to 1/4 turn on many other peoples recommendations. I took it for a ride and babied it for a few miles(until it was warmed up). It ran nice and smooth, so I think that solved the power problem because it wasn't smooth before. I turned around to bring it home and took it up to 6,500 rpm in 2nd gear. As it was climbing I heard a backfire and some stumbling. I let off and could here a lot of clattering coming from the left side of the motor. I coasted most of the way home and pulled the vlave cover. I found the exhaust rocker nut loose on the #1, but the pushrod still in place, and the intake pushrod bent really bad and wedged down under the intake manifoldon the #1. The rocker not was still tight. I'm wondering why this happened. Also i heard that early LT1's came with hardened pushrods. Could I use one of my stock pushrods in place of this one? There was no problem with them when I replaced them with the Combination Motorsports set up. Sorry for the long post. Any help would be greatly appreciated. I just want to break into the 12's!

Andy

91RSLT1

I just got done replacing a comp cams hardened pushrod with a 93-95 stock replacement, when I broke a pushrod. The 93-95 stock pushrods are hardened, so go ahead and use a stocker. Just make sure they are the same length. I would be willing to bet the hardened ones you have now are the same as the stocker but go ahead and pull one and compare the two. Other wise good luck with your hunt for 12's.

IrocManiac

Wow...thats the first time I've heard of an LT1 bending a pushrod just cause it was revved to 6500rpm...you sure everything was good after your adjustments?