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Posted by: Robson51 Feb 13 2020, 05:09 PM

I've used the search settings and also googled this question. Searching this site produced nothing and Google gives more than one answer.

What is the torque wrench setting for the intake manifold nuts? I have seen numbers from 4 (!) to 10 ft lbs.

What is the torque setting for the rocker arms? Again, a couple different numbers but 14 ft lbs seems the middle.

Any advice here?

Thanks

Rob

Posted by: 914werke Feb 13 2020, 05:12 PM

Because I hear this Q pretty often I posted a table with the most common torque values on my site in the file/downloads section (bottom of main page) http://www.914werke.com

Posted by: Robson51 Feb 13 2020, 05:16 PM

Intake manifold?

Thanks-nice chart

Posted by: cuddy_k Feb 14 2020, 09:19 AM

The Haynes manual has a lot of torque values at the beginning of each section. For 8.8 grade M8, the standard torque is 17 ft-lbs.

Posted by: Mark Henry Feb 14 2020, 09:43 AM

Posted by: Robson51 Feb 14 2020, 10:45 AM

I would think the intake manifold nuts were in that range, but Haynes calls out for 4.35 ft lbs. I've never seen that low of a setting on such a big bolt and can't figure out the logic behind it.

Is it a typo? Can someone explain why it would be so low?

Posted by: Tbrown4x4 Feb 14 2020, 11:03 AM

Possibly because of the phenolic spacer between the head and the manifold? I can't remember what I torqued my carb manifolds to, but both Clymer manuals I just checked had nothing for the intake. Not even under "Fuel Injection".

Posted by: rhodyguy Feb 14 2020, 11:04 AM

Value is based on the stud size. Not the nut.

Posted by: Robson51 Feb 14 2020, 11:16 AM

I get that, but again-why 4 ft lbs on an 8MM stud?

Posted by: stephenf Jan 18 2021, 06:44 PM

its not the stud the low torque is protecting, but its the gasket material......and since i am doing just that install.....thanks for asking.

Posted by: ClayPerrine Jan 19 2021, 07:38 AM

Torque settings for air cooled motors are much lower than their water cooled counterparts because air cooled motors grow when they get hot. So the torque on all the bolts go up as the engine warms. 4ft lbs is probably enough on the intake bolts. They are not structural, and the engineers don't want to crush the gasket when the engine is fully warm.

Posted by: Jake Raby Jan 19 2021, 07:50 AM

I torque intake nuts to 15#. 4# is no where near enough, unless you want a vacuum leak.
For 7mm (stock) rocker arm studs I go 12#, but I only use the HD 8mm units on my engines, and torque them to 18#.

Posted by: krazykonrad Jan 19 2021, 10:27 AM

Thanks for posting this. This will be a huge help.

Konrad