Rod arm hold down bolts

[Johndeere9610]

What are the treads on the rocker bolts. I had the treads pull out of the head so I'm going to try a helcoil.

Thanks
Rusty

 

[Tate]

M8x1.25mm.

 

[olddodgetruck]

i think this could be a common problem. if you look the bolt only catches about half the thread in the head. i had this happen to me, on the #6 exhaust. so i just put another bolt in there about 1/4 inch longer till i have to take the head off again.

 

[RAMICATOR]

i would look into a tread insert, not a helicoil. check out this http://www.mcmaster.com/#threaded-inserts/=9ow8mv

they a stronger. ive put inserts in and never had a problem since. just not a fan of helicoils

 

[COMP461]

or just use a rocker stud kit ,

Pure Diesel Power MaxSpool Cummins Rocker Stud Set 5.9 24 valve

 

[Tate]

Do those studs fix buggered holes in the head?

 

[olddodgetruck]

how far do they go into the head?

 

[COMP461]

how far do they go into the head?

they go to the bottom, which is .125 more then a stock bolt

I send about 20 sets a week out . its fixes the problem. I have them for DMax's as well