oscs

iTrader: (19)

So for the second time in less than 3 months or 3,000 miles the offset rocker on CYL #1 bolt has backed out and allowed the rocker to fall out of place and function. Anyone else seen this issue? All other are tight and it was torqued to factory spec. Also this time I put a lot of lock tite and its still backing out.

This was after repeated HIGH boost runs. Setup on heads are as follows:

L92
Stock valves
5 angle valve job
BTR .660 springs
Comp pushrods

93camaro_zzz

iTrader: (13)

That has to be annoying. Weird though. I have never had one back out.

oscs

iTrader: (19)

Yeah it's very odd. I called Erik @ HKE and he said the same thing. Never seen that.

Ping King

iTrader: (20)

are you cleaning the threads and applying blue locktite when torquing?

stevieturbo

Is the loctite you're using up to the job of engine temperatures ?

Are the threads in any way loose at all ?

oscs

iTrader: (19)

Threads are clean and tight and the loctite is more than capable.

stevieturbo

same bolt...ever replaced the bolts ?

God thread lock can be a ballix to screw out nevermind it backing out on it's own.

Just how loose or how many turns do you think it actually got ?

JoeNova

Degrease the bolt before putting loctite on it.

oscs

iTrader: (19)

Enough to dislodge the rocker

stevieturbo

Cant see any need to ever replace bolts...but maybe something is screwed up with it ?

I only loctite the intake side bolts because they break through into the runners, just use regular green Wurth stuff.

It's tight to remove even after the engine has been running for ages.

oscs

iTrader: (19)

Yeah I'm going to do a really good job of cleaning it up and order a new bolt. I might order a smaller bolt as well. There is a possibility of bind.

AutomagicLS1

iTrader: (18)

I never use loctite just permatex high temp sealant never had one back out

oscs

iTrader: (19)

Cleaned out the hole last night and ran a tap through it. None of the threads where missing and besides for a few chips and what looked like never seez at the bottom of the hole, all was well. The bolt was slightly bent but I'm almost positive that was a result of the rocker coming off and not the cause. Erik would have never assembled the motor with a bent bolt.

Anyhow, got a new bolt in with a little loc tite and we will see what happens from here.

93camaro_zzz

iTrader: (13)

I make sure my bolts are clean, but I have never even used Loctite on them, and still never had one back out.

3 window

iTrader: (1)

I'd bet pretty big money that most GM techs don't loctite rocker bolts when they reinstall. One backing out is strange.

oscs

iTrader: (19)

I agree but what the hell else could it be? No one has ever heard of such an issue.

Hou_tx_ss

iTrader: (1)

I was doing some testing up 99 a few weeks back and heard a weird sound in the top of the motor. It kind of went away so I just limped home and I felt like the car was down on power. I pulled the valve covers and sure enough I had a rocker bolt that had backed out. I took all the steps you did and haven't had an issue since. Nothing was damaged and I have no idea how it backed out.

oscs

iTrader: (19)

Well at least I'm not the only one.. Keep an eye on it man.

69-chvl

iTrader: (11)

Do you think that the bolt is just too small to withstand the pressure of a dual spring package? The kind of pressure these springs generate are good enough for a BBC engine which uses a MUCH larger stud. These bolts flex so much when changing the springs I keep thinking which one is going to strip out!!

oscs

iTrader: (19)

Great question