bcuzracecar

EDIT: Figured out I ordered 19 instead of 18...apparently the previous owner made the same mistake.

My "friend" snapped the head off of one of the valve cover bolts...Long story short I had to get a new bolt/"stud" for the head cover bolt to thread into.

(number 18 on the diagram)



Upon removing the old part, I noticed the threads were stripped approximately halfway up the shaft, as well as what looks like thread cuts in the non-threaded shaft of the bolt.

It required a bit of muscle to remove so I'm thinking someone went ham on it.
(old bolt removed)


I started to screw in the new piece by hand, and it felt pretty sticky. So I stopped in fear of doing more damage and created this post.

(below) New one threaded in by hand. Approximately 2cm more to go...

Billman250

You are not supposed to remove any one of those bolts unless all 20 are loosened first. By taking out just that bolt, you gouged the threads against the internal rocker shaft as it was not allowed to rotate (hence why it looked stripped)

bgoetz

So I would think loosening them all and retorquing would be the right answer? Or isn't it quite that simple?

Utah S2K

Not quite that easy. There is no way to tell what damage was done. This is a very critical area with extremely tight tolerances. Removing only one bolt is "out there" and may or may not have created an issue. This owner is in unknown territory as any mechanic would never do this. Engine may run fine or have a major failure at higher RPM. No way to tell.......

Utah

windhund116

I'd definitely replace the damaged bolts. Better hope not too much damage was done to threads in head. Pull all bolts and try to thread a new bolt (replacing the damaged one) by hand. See if it goes into the head, with the same feel, as the undamaged bolts --- goes into the undamaged head positions.

You need to get even torque onto the bolts. Prolly in a couple of stages of tightening.


That's my 2¢ worth of 2¢. Good luck!

N777CK T

Oh so this isn't the way to do it and you'll be better off having the screw thread that's stuck inside removed instead?

I've just done this on mine:



And I believe in the thread below 07RioS2K is saying to do what the OP of this thread has done by buying the part the thread is stuck in and replacing that instead?

https://www.s2ki.com/s2000/topic/111...d-pics-inside/

What shall I do?

Utah S2K

If you can drill a small hole and get the smallest size EZ Out in it; all the power to you. But as you obviously over torqued and snapped the bolt head off it might prove problematic. Easiest would be to remove the covers, sequentially loosen the caps, replace the defective bolt and sequentially retorque.

Utah

P.S. Invest in a digital torque wrench

windhund116

" P.S. Invest in a digital torque wrench. "

All he needs is GOOD quality torque wrench. Not necessarily a digital one. Cross-tightening pattern. In stages. I've used an old fashion Snap-On type for years. No problems.

N777CK T

Ok well I've ordered part 19 and 9 on each diagram for delivery in a few days. Is it essential to loosen the others sequentially or did the OP just order the wrong part?

I used a draper torque wrench, what is a good/better one?