rocker arm stud nuts

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LABERTEW
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I have a 1998 blazer 2wd 4.3L V6. After removing the heads and replacing a blown head gasket, I can't get the rocker arm nuts to stay tight. I replaced all of the nuts (12) with new ones. I took out the lash and turned each nut 3/4 of a turn as the book stated. Do you adjust it while running?
The Haynes repair book gave two adjusting points, on TDC for #1 and TDC for #4. I followed instructions but some nuts are still coming loose.

Thanks
Jun 22, 2007 at 7:11 AM
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E40WATER12
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I am not 100% on the adjustments on those trucks, Ive got experience with cyl hd work, Ive got a question to ask, On the top of the stud were you hd nut is placed, On the stud is there little slot on top?. For example that a flat head screw driver could fit?. If so then Once you use a feeler gauge measuring tool, then with the screw driver in the little slot on the head bolt, tighten the nut, Things should work out for you.

Good Luck.
Jun 22, 2007 at 1:23 PM