Author Topic: Torque Spec for Intake Manifold and TB (Read 7259 times)

Thurber · « **on:** May 31, 2009, 02:12:44 PM »

Hello, I couldn't find the numbers I'm looking for on the internet. Does anyone know the torque specs for the both the upper and lower intake manifold as well as the TB.

Thanks.

1991 E30 M42 · « **Reply #1 on:** May 31, 2009, 05:31:57 PM »

Tighten it till it "feels good" I probably have taken my manifold and tb off 100 times and have never torqued them to spec, I didn't even know there was a spec.

Thurber · « **Reply #2 on:** May 31, 2009, 07:49:39 PM »

OK seems reasonable. And a follow-up question: Do you need to replace the gasket every time you remove the Intake manifold. I believe you always need to replace the TB gasket because it's metal but does that also apply to the manifold's?

1991 E30 M42 · « **Reply #3 on:** May 31, 2009, 09:40:00 PM »

I rarely replace the tb gasket but I always replace the manifold gaskets.

Thurber · « **Reply #4 on:** June 01, 2009, 02:14:45 AM »

I see. The exact opposite of what I thought. Duly Noted.

1991 E30 M42 · « **Reply #5 on:** June 01, 2009, 08:21:12 PM »

Quote from: Thurber;72729

I see. The exact opposite of what I thought. Duly Noted.

I also rarely remove the throttle body because I no longer have a heater plate , and the hoses are looped.

Jimmy Lewis · « **Reply #6 on:** June 02, 2009, 12:23:11 AM »

The gasket has a pretty big surface area with respect to the size of the opening of the throttle body, just make sure you torque it evenly corner to corner and it should be gravy.