turbocharger thread size

[turboCR]

What is the thread size and pitch for the center section of the stock turbo with coolant passages? I have tried numerous sizes and can't get a match, inlcuding Std pipe thread sizes and SAE sizes. I don't want to force it- I just got it back from Cheetah. 3/8th pipe is close, so is 5/8 bolt.

Thanks!

84 riv turbo
232k miles
bone stock
still going-for now.

 

[gteatr6]

I believe they are #8 metric. I know the exhaust elbow are for sure, just had to buy some for new down pipe.

 

[turboCR]

Making sure we are apples to apples, not the bolts that secure the housing, these are the opening for the inlet and outlet of the coolant hoses, so tht coolant can enter and exit the center section.

Tx

CR

 

[gteatr6]

sorry, I was talking about 87 gn turbo, my goof. They are probably metric anyway though.

 

[salvageV6]

Mine were 3/8" NPT.

Innovative DBBL.

They are tapered like any pipe thread should be since they have to seal and hold water pressure.

 

[turboCR]

Thanks,

I'll try it today.