thread size for t3
Turbo Mini Forums

well i have got to make a long nut for miniwilliams and i need to know the tread size found on the t3 eg were the bolts go in on the waistgate housing.

got a spare t3 in my shed but tried a 5/16 unc and m8 but neither fit and does look to cousre to be a unf , does any one know 3

regards richard

always looking for them bigger bunches of bannanas

All metric... So it'll be M8 coarse...

I thought they were M8 too. Try running a tap down it first as the heat does seem to make the threads tight over time.

ah thats good news then, my m8 just went tight so properly just crap on the thread, mind you its a m8 X1mm hopefully its not m8 x1.25mm then i would be buggered.

thanks for replys now i can crack on.

i only had 2 mins to check last night before work so thanks again.

always looking for them bigger bunches of bannanas

Standard M8 (ie, ISO coarse) IS 1.25mm pitch, the 1.0mm pitch is non-standard (fine).

I'll dig my one out later today and double check, but I'm 95% certain it was M8 X 1.25

Rod.

Schrödinger's cat - so which one am I ???

all done now it was m8 x 1mm.

thats a standard pitch for m8
fine is .75mm
standard 1mm
course 1.25

occording to my tap chart.

mind you had to use hexi brass instaed of steel as i snapped a piolet driil bit in the only bit of hexi steel i had.

never mind it should do the job

always looking for them bigger bunches of bannanas

Hoggy I have to disagree, standard M8 is 8 x 1.25.

1mm pitch is standard for a M6 thread.

Well what ever tread it is, you have done a FAB job mate, thanks so much, I got an old bolt from the turbo and it fitted like a glove.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

As per Tom,
M8 X 1.25 (ISO coarse) is the industry standard thread.
There must be some differences amongst the turbos as I've just measured my spare and all the holes (the 6 core to exhaust housing, the 5 exhaust housing to wategate housing, and the 3 wastegate to elbow) are all 8 X 1.25

Strange.

Schrödinger's cat - so which one am I ???

I think we better beg to differ as they say, maybe we have odd turbos lol.

TBH i don't care it's it's an m12 tread at a .0990 pitch, it fits a treat lol

all the best MW

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

Schrödinger's cat - so which one am I ???

or even that the ones you have come across were changed

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

Yes, I didn't mean yours particularly, but anyone's could have been repaired/modified at some previous time at that sort of age. The only person who would know would be if someone had owned it for "life".
So mine could easily be non-standard - it came from eBay so has no history :)

Schrödinger's cat - so which one am I ???