snapped exhaust head stud

[5e colin]

hey lads i have a stud snapped of my head for the exhaust , i drilled her out and tryed to get the rest turned out , but didnt come out so now its a mess so i am going to need to drill it out bigger and fit a helicoil

so here is my question wish size do i need ????? any of my fellow starleteers have a link to a cheap ish set that i need

cheers 5e colin

[H_D]

try using a reverse threaded screw extractor if you have already drilled a hole in the broken stud.

I had to use on of these on a ct9 that had a snapped stud it worked a treat.

[5e colin]

tryed al that my friend iit just al fucked up with the reverse thread

i stopped before i damaged it to much it got water logged in the threads and turned to wite dust in the threads making it impossible to come out

i can still over drill it on fit helicoil

[H_D]

if reverse thread does not work helicoil is probably the last option.

this may have to be done in steps from small to big to get a new thread on there use plenty of wd40 when helcoiling as it makes it easier.

see if you can get the same size stud back in after is helicoled or just use a bolt

[5e colin]

yep thats what i want to do but dont know wich size the oem stud is i have no thread gauge :(

[funny onion]

I had this problem and eventually a chunk of the head surrounding the bolt crumbled off.

Might be worth trying to source another head

[5e colin]

ooo dont want to do that funny onion its a old ported head where i got new guids fitted to it when i rebuilded the engine 30k ago

[funny onion]

I see :/ maybe try taking it to a machine shop to get them to remove it? Not sure a helicoil would last forever I think it could be the start of an ongoing problem :/

[5e colin]

i think a coil be fine my custom turbo kit to ct9 cat is done so the mani wont ever need to come off again :)

i still need that thread size

Edited August 5, 2014 by 5e colin

[Flaminsam]

You need these in your life. M10x1.25 if your staying with standard size threads

http://www.wurth.co.uk/hand-tools/thread-repair-and-reinforcement/thread-repair-system-time-sert

[5e colin]

^^^^ thanks flaminsam thats exactly the ting i was after :)

cheers 5e colin

[rmsnoel]

Run the engine to heat the head up. Should come out.handy then

[5e colin]

^^^^ thanks for the tip rsmnoel i never did that i always work on cold metal

just waiting for the helicoil kit to arive now was only 13£ delivered will try then when the head is hot to get the rest out

[5e colin]

wel i ordered the helicoil kit last week and this morning it arrived i must say its 1 of the easiest kits i have ever used im so happy it worked spot on and the thread is way stronger now i am thinking of doing the remaining 5 to

got this little kit delivered for 16euros

20 minets later i ended up with this

wel happy now thats 1 head saved :)