About finished doing a timing belt install, bought a real nice kit off of ebay. Very nice kit.
Anyway to the bad part;
I was tightening down the tensioner bolt which is labeled #7
It stripped, not fully, but to the point where the tensioner dosent fasten completely.
Upon inspecting the bolt there were aluminum shreads sticking to the inside of the bolts threads when it was pulled out
What are the options here? helicoil sounds good, but would tapping the thread work? \

Once I find out the size of this #7 bolt I could up the size, but am worried about ruining the engines factory threading size

Might have to remove the motor mounts and jack the motor up if it is absolutely neccessary.

 

you would have to go bigger, or use a helicoil.

just running a tap thru wont work, as you ruined the female threads, not the threads on the bolt. take a pic of what threads you ruined and the bolt.

 

Heres something for now, gotta run to get the next one
bear with me, appreciate the help, bad camera

its a little mashed but thats cause I tried to saw the thread part in half to get it to fit

 

meh... coat the bolt with wd-40, stick some jbweld in the hole and then tighten it up. Let it sit overnight before you do anything else. You should be able to back it out and then put the bolt back in with the pully attatched this time.

 

<div class='quotetop'>QUOTE (DTN @ Feb 17 2009, 06:20 PM) <{POST_SNAPBACK}></div><div class='quotemain'>meh... coat the bolt with wd-40, stick some jbweld in the hole and then tighten it up. Let it sit overnight before you do anything else. You should be able to back it out and then put the bolt back in with the pully attatched this time.</div>ya but would it keep the tension on the belt? JB isn't that strong

 

DO NOT DO THAT! Ok thanks. Helicoil it. Do it right and it wont give you issues again. I wouldnt trust my timing to JB Weld. If Im thinking right that bolt is an M8 x 1.5 I think. But make sure to run a die over it or something to verify.

 

DTN, that is probably the worst advice you have EVER given... EVER..

do not listen to anything he said..

i agree on the size eric said. thats why i wanted to see a pic of it.

if you can, i would up the size to an m10, but i dont know how messed up the internal threads are.. otherwise helicoil works if you get the right size.

bring the bolt to an ace hardware, and find a nut that matches the bolt.

are the threads bad on the nut, or inside? you said aluminum shavings, so i would guess the inside is bad.

 

It works. I used that method on my subframe. The JB is just filling the gaps. I finally found a use for JB that works. Since then, I've put my subframe bolt in and out a few times with an impact wrench. Also, if it fails, then you can drill the hole out bigger and put in helicoil after helicoil whenever you pull that bolt out.

 

Maybe on another part of the car. Ive heard of it. But not on the timing. Plus its going into aluminum so it may not hold as well for whatever reason.

Nate, Im not sure an M10 will work only because of how big the hole in the tensioner bearing is.

 

yeah, didnt think of that.. helicoil ftw!!