subaru ej20 wrx thread question

split_trix · Jedi Knight Joined: 28 Apr 2006 Posts: 107

hi, im trying to put the engine on a stand and was wondering what thread the studs are that locate int he gearbox bell housing...... its not M10 cos i've tried those.... do the japs use imperial threads ?

cheers
chris
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richbaker78 · Teacher of Padawans Joined: 31 Jan 2006 Posts: 1298

ah yes that problem!! Not much help im afraid but they are metirc just with an odd pitch which I cant remember - try mailing RJES he will be able to give you detials- i ended up down the scrappy robbing bolts from legacies.

ricola · Posted: Fri May 19, 2006 9:22 am Post subject:

They are an M10 metric fine, off the top of my head I think that is M10x1.25..

I'm trying to source some of these countersunk as when I'm reversing the rear cradle the bolt heads hit it. If anyone knows a source I'd love to know! In the mean time I have some button head bolts which I will cut down and slightly countersink..

Rich
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starspider · Wannabe Joined: 14 Jun 2006 Posts: 5 Location: ESSEX

The thread is M10x 1 got mine from the local motorbike shop

doppelganger · Posted: Wed Jun 14, 2006 7:26 pm Post subject:

rjes · Posted: Sat Jul 29, 2006 3:24 am Post subject:

The thread is M10 x 1.25. This is not the same as ISO Metric fine (M10 x x1.0), as used all over Europe. It's Japanese spec M10. The Japs use only one pitch M10 for both applications, where here we use M10 x 1.5 for structural bolts, and M10 x 1.0 (M10 fine) for pipe gittings such as brake linesm etc.
It can be difficult to get hold of M10 x 1.25 here. Your best bet is to get 'em from scrap Japanese products. Also be aware that if you do get new European M10 x 1,25 here, it will almost certainly have the ISO 17mm hex head. The Japs use a 14mm hex flange bolt / nut as standard, abd this can have an effect on clearance for tools.
Hope that helps
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Richard,

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ricola · Posted: Sat Jul 29, 2006 7:32 pm Post subject:

Myself and a friend ended up ordering a small batch of screws for the lower two adapter plate bolts. They are M10x1.25 with a countersunk head, grade 10.9. Just need to countersink the adapter plate and no more hassles with transmission bushing clearance!

We have a few left over (minimum batch sizes!) so if anybody wants some give me a shout..

Rich
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autohausdolby · Padawan Joined: 20 Jun 2006 Posts: 51 Location: Sheffield

I wondered why I couldn't get anything to go in there!

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