Eriks85Rx7

Does anyone know what the thread pitch is on the exhaust manifold studs on a 12A.. I have tried lowes and i even bought pineapple racing exhaust nuts but none of them will fit. I have been trying metric sizes since it is a japanese car.

Are they metric or standard? Your help will be greatly appreciated!!

IanS

iTrader: (4)

I would assume its metric ad most likely it is an odd size. I also need to know what size it is since I need to replace at least one of mine. I may have extras off my parts motors so let me know how many you need and I may be able to help.

Eriks85Rx7

I need four of them. I know that they are 10M but the pitch i have no idea. I have tried 10m 1.25 and 1.50 with no luck.. This is the only thing holding my back my project at the moment..

Jeff20B

iTrader: (13)

They are 10mm x 1.5. If you can't get 1.5 to fit, there is something wrong with your threads.

Do they look crushed or damaged?

Glazedham42

iTrader: (4)

So are you trying to replace the exhaust studs or the nuts?

Eriks85Rx7

Im trying to replace the nuts. Yeah the threads are little weird. I bough 10m 1.5 but they start to screw on but then stop and becomes hard to turn. I don't want to crossthread them on there.

Dan_s_young

iTrader: (1)

Time for a tap and die set, can tell you the exact thread pitch and you can run a die over the threads to clean them up.

rxtasy3

iTrader: (2)

metric thread pitches come in 1.0, 1.25, and 1.5. the 1.25 i dont think is used that often.

Eriks85Rx7

alrighty I'll try my best thanks guys!

Jeff20B

iTrader: (13)

Tension bolts and choke **** are 1.0 pitch. Bellhousing to engine and tranny to body are 1.25. Only exhaust studs and front cover bolts are 1.5.

All are 10mm diameter. This is just a brief list off the top of my header. Oh yeah, the alternator long pivot bolt is 10mm x 1.25 too, while the small bracket bolt is 8mm x 1.25.