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Chat Area => General Car Chat => Topic started by: JamesV6CDX on 10 June 2009, 23:47:08

Title: Exhaust manifold gasket - opinion
Post by: JamesV6CDX on 10 June 2009, 23:47:08

For anyone who has fitted these on V6's...

Does anyone else think, that 20nm is too low a torque, when fitting exhaust manifolds, using genuine VX multilayer steel gaskets and new studs/nuts?

Although I initially tightened to 20, I then further increased it, to what felt more appropriate.

20nm doesn't seem to close it up effectivelty, IMO...

Title: Re: Exhaust manifold gasket - opinion
Post by: markey mark on 11 June 2009, 00:25:54

i do them as tight as i can with 3/8 drive socket dont use torque wrench on small bolts ! mind have done that many dont tend to be too far off !  ;D

Title: Re: Exhaust manifold gasket - opinion
Post by: JamesV6CDX on 11 June 2009, 00:28:10

Quote

i do them as tight as i can with 3/8 drive socket dont use torque wrench on small bolts ! mind have done that many dont tend to be too far off !  ;D

Likewise - I can "feel" what is appropriate on these..... just looking for how others felt  :y

Title: Re: Exhaust manifold gasket - opinion
Post by: Marks DTM Calib on 11 June 2009, 08:12:42

I normaly do 25Nm....and use a torque wrench.

I have seen to many stripped threads in the alloy casting of the head to go to OTT with them.

One of the key things is to ensure all nuts/studs are tightened to an equal amount to get a constant clamping force across the whole manifold face (something you cant do with a calibrated arm)

Title: Re: Exhaust manifold gasket - opinion
Post by: JamesV6CDX on 11 June 2009, 09:31:02

Quote

I normaly do 25Nm....and use a torque wrench.

I have seen to many stripped threads in the alloy casting of the head to go to OTT with them.

One of the key things is to ensure all nuts/studs are tightened to an equal amount to get a constant clamping force across the whole manifold face (something you cant do with a calibrated arm)

I've seen you do a manifold gasket with a calibrated arm  :P  ::) - although I guess you arm is particularly calibrated  :y

Title: Re: Exhaust manifold gasket - opinion
Post by: shammster on 11 June 2009, 15:55:40

Agree 20 seems low, nipped up another 'bit' by hand after.