rocker arm spring?

[northerner]

Helicoil size is M8x1.25 I had to do Four of my mates old car that snapped the Exhaust rocker shaft. I've still go the kit with Six left. You can have them for a tenner If you want

[turbomike]

i notice on mk1s its bolts holding down the shafts and on mk2s its studs and bolts,would it possibly be worthwhile using just studs maybe loctited in and doing away with the bolts as long as the threads are good,i know its the soft alloy thats the main cause of the problem

[30psi]

Well currently I've only got bolts, but once did notice studs on a bluebird. I suspect that its hard to tell what it has, but they look like bolts to me in the pic.

[datdrift]

your inbox is full northener yep i think i'll take them, does it have the drill bit/thread cutter or is it just the helicoil inserts?
is paypal ok
yep mine's all bolts, i think tbh it will probably be fine as it is, but i would like to get the helicoil done as the engine does get a bit of abuse, and i wouldent like it to pop the bolt out when im drifting 100+miles away.......

[northerner]

It has the Helicoils Tap and tool to screw in the Coils but No drill bit but I'm sure its not a special one. Inbox emptied

[PukkaSilvia]

Its an 8.3mm drill size...

if it hasnt snapped the rocker shaft you would be very lucky. check for hairline cracks in it. You need a m8 helecoil kit. Dont risk anything else.

I was lucky that my bolts although ripped out were just bouncing about in the stripped hole and not got jammed up inside the head.

Helecoil the lot. its very easy compared to doing exhaust stud thread replacements

http://www.toolsnextday.ltd.uk/Helic...icoil_kits.htm

[datdrift]

you really think its worth helicoiling all of them i might just threadlock them back in? i will probbaly change the rocker shaft tho as ive got loads of spare heads, etc
it seems to be doing alright at the moment, ive done over 100miles with it, don't think its seen the redline yet, but probably hasent been far off

[JackieFan]

Loctite will only help the problem if it's caused by the bolts coming loose and vibrating the threads to bits. I think it's more likely that its beacuse the threads are stressed that they rip out.

[sideways danny]

Originally Posted by JackieFan

Loctite will only help the problem if it's caused by the bolts coming loose and vibrating the threads to bits. I think it's more likely that its beacuse the threads are stressed that they rip out.

Bang on IMO, too many revs, and it overloads the threads

[datdrift]

ok well ive already got the helicoil kit thru - thanks for the speedy delivery northener now ive just got to get a drill bit and have a go sometime this weekend.......
went out for a play in it last night and it held up alright, it did seem to be a bit more 'ticky' than usual, but thats probably just me noticing in more