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Rocker arm bolt trouble

I have a '78 GMC Sierra that originally had a 350 diesel engine in it. Sometime in the past it was replaced with an Oldsmobile 350 gas engine. Seems like a good engine, but I can't get the rocker arm bolt to stay tight on the #3 exhaust valve. I've even tried locktite but it just backed back off after about a days worth of driving.

Anyone have a solution to this problem? Will a new bolt make a difference? The fix on Chevy engines is easy... just go buy a new locknut, but the Olds engines use a bolt.

This is just an old work truck so I'm not going to spend a fortune on fixing it. I only paid $400 for it to begin with.

Thanks, Tony

Reply to
kimmell
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We'll assume the threads in the head are good, you didn't say.

We'll assume the bolt is the problem. You didn't mention any others.

Any whoooo...... Get a new bolt, clean the hole in the head THOROUGHLY with a good spray carb cleaner, using RED loctite, dowse the hole and the bolt liberally, and install to torque specs.

If you use a new bolt, RED....Loctite, and torque the bolt, it WILL NOT cause another problem.

Fact, not Fiction.

~:~ MarshMonster ~sips his crownroyal~ ~:~

Reply to
Marsh Monster

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