Perkins AD4.203 Exhaust Manifold Torque

fixt · Feb 28, 2018

I can't find it in the service manual
It's the (4) 3/8 studs with brass nuts for the exhaust manifold to head.
Going from a standard S.A.E. table I'm guessing about 30-35 ft lbs?

Hard to get a torque wrench with a crow foot in there, so maybe just gooduntight?

Dieseltech · Mar 1, 2018

30 is enough, and re-check after running awhile. I set some at 30, hand check with a long wrench and then tighten the center nuts by "feel" of the wrench.

fixt · Mar 1, 2018

Thanks Dieseltech.
There's no way to get a long wrench in there due to the fuel tank being immediately above it. I used stubby wrenches to get it off and had to pull the drag link, but the front end is apart anyway waiting on parts so I figured it would be a good time to do it. I'll use 30 ft lbs as recommended for the the ones I can get a torque wrench on and "feel" for the inside bolts.
Thanks again.

jimmi · Mar 1, 2018

Book says Exhaust manifold 21-24 ft.-lbs

Perkins AD4.203 Exhaust Manifold Torque

fixt

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Dieseltech

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fixt

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jimmi

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