When it comes to critical mounting surfaces such as manifolds, waterpump etc. I'm a torque ****.

I like to install a turbo by taking off the rear housing and torquing its flange evenly to the manifold, but am then presented with a problem of guessing the toruqe on the bolts holding the housing to the CHRA.

You can't exactly get a torque ractchet on those babies, at least not all of them...may get some with a universal...so what should you do?

I normally just get them all "even" and I've never had a problem, but I'm putting together another setup now and thought I'd pose the question.

1/2 turn past hand tight? 1/4 turn?

BTW - turbo is a GT3574 from A-spec.

 

You should be able to get a crows foot on it.

 

If you got your turbo from A-Spec, the info shoulld have come with the turbo as mine did.

From the Garrett spec sheet for GT turbos.
V-band nut: 50 inch pounds except for GT40-50 110-130 inch pounds.
Compressor: 145-165 inch pounds.
Turbine: 185-215 inch pounds.

 

Thanks! I also needed this info for my A-spec GT3574.

 

Thanks, yes that info didn't come with mine.

13B-RX3: I can get one on, but not on all of them.....maybe I'm not trying hard enough

 

Maybe because my GT35R T3 is an actual production Garrett turbo which came in their box. Yours is an A-Spec bastard (good bastard) and they left out the card.