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FAQ / REFERENCE => M42 Reference => Topic started by: Thurber on May 31, 2009, 02:12:44 PM

Title: Torque Spec for Intake Manifold and TB
Post by: 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.

Title: Torque Spec for Intake Manifold and TB
Post by: 1991 E30 M42 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.

Title: Torque Spec for Intake Manifold and TB
Post by: Thurber 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?

Title: Torque Spec for Intake Manifold and TB
Post by: 1991 E30 M42 on May 31, 2009, 09:40:00 PM

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

Title: Torque Spec for Intake Manifold and TB
Post by: Thurber on June 01, 2009, 02:14:45 AM

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

Title: Torque Spec for Intake Manifold and TB
Post by: 1991 E30 M42 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.

Title: Torque Spec for Intake Manifold and TB
Post by: Jimmy Lewis 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.