stock 87k mile lifters, 918 beehives, set up at 1.75 so I guess 140ish on the seat, CC306 cam. Stock hardened pushrods, 3/8 NSA crane golds with comp guideplates.

Just finished up a head swap, BIG PROBLEM! Thought the car was loping awfully hard, so I look closer and see that the valvetrain for cylinder #7 was completely still, not a twitch nothing

lets backtrack a little bit. In laziness i set the lash super quick before I started her up, i can only get it right doing it by ear. so i start up and shut it off immediately (1-2 sec) after some loud clacking. find the intake rocker turned sideways, and a pushrod bent into a 40* angle. install new pushrod, cursing I CAREFULLY set the lash cold before starting up. Then that's when I see #7 refusing to work.

Pushrods, rockers, studs, valves all check out perfect. So I pull the intake expecting to find destroyed lifters, and what do I find? Perfectly fine looking lifters, the rollers on both are fine, no missing pieces that I can see outside, and I couldn't compress the plunger at all by hand. Also oil pressure was like 65+ psi at the time, and both lifters are full of oil. After seeing this i feel down on the cam and it feels perfect all the way around, stuck a magnetic pickup tool down there and it didn't get anything, also no debris in the lifter valley either.

So what's the problem here?!?!?!?!?!?!

Good news is I have a set of Comp Rs that have been sitting in my garage for a year, they are the old C-clip style Rs, so since I had to pull the intake and lifter spider thing, I think I'm just gonna throw them in anyways. Car is DAMN loud after the heads through open longtubes though

 

If I were you I'd take that cylinder head back off to see if your valves made contact w/ the piston.
Have you rotated the engine w/ the intake off to see if your lifters for that cylinder move?

 

From what I read they were loose and bent the pushrod when the rocker came off.
My advice is to pull the intake like has been stated and check to see is the lifter still in the keepers and undamaged on the bottom(roller). Ya may have wiped out the cam if it turned from being out of the dogbone keeper, but lets hope not.

 

yea the pushrod was bent to hell, that's why I thought it took out lifter at least, but the rollers are good on both, both were still in the keepers. I dunno I just threw the old R's in there and they're doin fine, hard to adjust the valves with open headerss. I want to go enjoy my new heads though!

 

That's good news.
Hope the "R" don't give ya any trouble.

 

i agree with what was already said.. hope you didnt wipe the lobe.Also you can ajust your valves without the engine running so you dont have that open header problem.