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Engine Specific Info and Questions => IDI Engine => Topic started by: 89VWdieselGolf on September 25, 2004, 01:11:04 pm

Title: Exhaust manifold torque specs
Post by: 89VWdieselGolf on September 25, 2004, 01:11:04 pm: i bought new gaskets for my 1.6 N/A diesel because of an exhaust leak...what should i torque them to?

thanks, Jeff
Title: Re: Exhaust manifold torque specs
Post by: racer_x on September 26, 2004, 08:43:33 am: According to Bentley:

Quote from: "Bentley"
Exhaust manifold to cylinder head . . . . . . . . 25 NM (18 ft. lb.)
Title: Exhaust manifold torque specs
Post by: 89VWdieselGolf on September 26, 2004, 01:12:46 pm: perfect! thanks :D
Title: Re: Exhaust manifold torque specs
Post by: TurboJ on October 14, 2012, 04:11:59 pm: Yes, this is an ancient thread, but the question is very valid.

I just fit my exhaust manifold today, and 25 Nm feels incredibly little.

I have OE copper nuts, and at 25 Nm it feels like they're barely on.

People: what are your experiences and suggestions?

I have a bigger than standard turbo there too, along with a separate waste gate, which adds a lot of extra weight to be supported bu those little copper nuts...
Title: Re: Exhaust manifold torque specs
Post by: 745 turbogreasel on October 14, 2012, 05:01:18 pm: Add a brace from elsewhere, or face broken studs.
I've never had a backing out problem with the OE fasteners @18lb.
Just make sure the threads are nice n clean first.
Title: Re: Exhaust manifold torque specs
Post by: theman53 on October 14, 2012, 06:24:22 pm: I honestly never torqued mine. I feel bad, like I should be over on the hillbilly forum saying this. I just use my 1/4" drive rachet and get them tight. It is an 8mm stud so it will take more than 18ft/lbs, but it is in an aluminum head. Hope all goes well for you.
Title: Re: Exhaust manifold torque specs
Post by: libbydiesel on October 14, 2012, 07:05:02 pm: I always torque to 18 ft lbs with the proper nuts and the proper extra-thick washers, but add a triangulating brake to the block with any custom turbo install.
Title: Re: Exhaust manifold torque specs
Post by: TurboJ on October 15, 2012, 12:56:38 pm: OK, thanks, guys! The 25 Nm just seemed like the nuts would almost fall off...

My plan was from the beginning to build some serious braces for the manifold, turbo, DP and wastegate.

I guess I should be fine then.

And yes, I am using the T2 Transporter Diesel thick washers.
Title: Re: Exhaust manifold torque specs
Post by: libbydiesel on October 15, 2012, 01:24:23 pm: I would also mention that you don't want to over-brace the exhaust either. Doing so can lead to stress cracks from expansion/contraction from heat cycles.
Title: Re: Exhaust manifold torque specs
Post by: TurboJ on October 15, 2012, 04:16:22 pm: I will be using ball joints in every mounting point of the braces.
Title: Re: Exhaust manifold torque specs
Post by: gldgti on October 15, 2012, 05:14:40 pm: Quote from: theman53 on October 14, 2012, 06:24:22 pm
I honestly never torqued mine. I feel bad, like I should be over on the hillbilly forum saying this. I just use my 1/4" drive rachet and get them tight. It is an 8mm stud so it will take more than 18ft/lbs, but it is in an aluminum head. Hope all goes well for you.

Thats what I usually do aswell :-)

I thought this WAS the hillbilly forum????
Title: Re: Exhaust manifold torque specs
Post by: theman53 on October 15, 2012, 06:56:26 pm: Nope, the hillbilly forum has a few cross overs here. I am probably just a fuzz more refined than the average hillbilly, but the other diesel forum is full of them. I would go into detail but there are too many here and some may get internet hurt.
Title: Re: Exhaust manifold torque specs
Post by: DanV990 on October 15, 2012, 09:38:38 pm: Quote from: theman53 on October 14, 2012, 06:24:22 pm
... I just use my 1/4" drive rachet and get them tight. It is an 8mm stud so it will take more than 18ft/lbs, but it is in an aluminum head...

I did the same thing. I put an engine from a NA MKI 1983 Rabbit in my 1992 ECOdiesel in August and I just used a 1/4 ratchet and tightened the exhaust manifold bolts until I felt they were just gutentight. They've been good (no leaks, loose bolts, or broken studs) for the last 3,400 miles.