anyone else have a exhaust head manifold stud back out?   i have this one stud top center that keeps backing out.   i got all new studs nuts washers from dad. and this one keeps backing out.   i have used just the new copper nut and new stud. i have used new nut new washer new stud. i have used new nut new lock washer new flat washer and new stud.   darn stud keeps backing out the nut does not move once tightened.. the stud just backs out.

like lawn mower , weedeaters etc

I have noticed that if I do not heat up the cam towers then the cam towers scrap the bolt holes in the rocker arm shafts. This leads to metal shavings in the rocker shaft. Twice now I had to reclean the tower and shaft because of this. To get around this issue I heated the cam towers up to 250 degrees in a toaster oven.   Anyone else have heat up the towers to put the rocker arm assembly back together?

86 only stuff   etacs 50 shipped map 35 shipped ignitor 35 shipped boost sensor 35 shipped       http://imageshack.com/a/img820/2130/mvu7.jpg http://imageshack.com/a/img843/5532/862ga.jpg