Aluminum head rocker arm bolt hole stripped
Thread Starter
Joined: Sep 1999
Posts: 1,496
Likes: 60
From: Danville, IN
Car: 1991 Camaro Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: Strange 12 Bolt, 3.42
Aluminum head rocker arm bolt hole stripped
I always take my rocker arms off over the winter to avoid weakening the valve springs during storage. I went to put it everything back together today and one of the rocker arm bolt holes in the head is stripped. I went to torque the bolt down on one of my shaft mounted rockers and it wouldn't tighten the threads pulled right out. This is a 7/16-14 hole on aluminum heads. Can I heli coil this safely or should I just take the head off and have a machine shop repair it?
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
You should be able to helicoil it if you're confident in your ability to get it in straight.
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