THDP bolts

[Sal Lubrano]

Does anyone know the length and size of the Four bolts which secure the THDP to the turbine housing? I need to order four of them in stainless.

 

[NHRA Super Gas]

And exactly what size allen wrench are you supposed to use?

I would think the originals are in brass (or whatever they are) so they don't rust?

 

[headstrong3157]

Im assuming they are all the same size. The ones in my downpipe have a 6mm allen wrench head.

 

[ijames]

M8x30, in stainless. A2 is 304 and A4 is 316 - get A4 if you can. I ordered some from www.mcmaster.com, along with some ultra high temp rated antiseize (nickel based). A4 grade were over $1 each. They need a 6 mm hex key.

 

[wheelin]

What lenght and thread pattern? and diaminter?

thx for guy whole is completly boltless

mike

 

[Brer Rabbit]

Hey Sal....

Unless that turbo is brand new u might want to by a tap and run it thru the threads on the turbo. Rust will build up in two of the 4 holes and will tear up the threads on ur new bolts when u try to tighten them all the way down. Tap em, then antiseeze the crap out of em.

 

[ijames]

M8 diameter, 1.25 mm thread pitch, 30 mm long, socket head cap screw in A4 (316) stainless steel.

The shorthand vernacular is DIN 912, A4, M8x30.

I forget if they have a minimum or not, but if not, www.brikksen.com is cheaper than www.mcmaster.com.

 

[wheelin]

Cool thx!

mike