Print Page - Exhaust Manifold Nut Torque Specifications on W40

Title: Exhaust Manifold Nut Torque Specifications on W40
Post by: Ruvel on October 30, 2020, 02:04:13 PM

Hi Everyone,

I've been searching for the torque specifications for the 4 nuts that attach the exhaust manifold to the cylinder head on the Westerbeke 40, but haven't had any luck. I did find the specs for the W58 which states 20-24 ft. lbs.. I would assume that the W40 would be less, something like 18 ft. lbs.. Does anyone here know the correct torque specifications for them?

Thanks.

Title: Re: Exhaust Manifold Nut Torque Specifications on W40
Post by: Jordan on November 01, 2020, 05:56:46 PM

Westerbeke 40s are either Perkins 4.108 or Perkins 4.107. This might help
https://www.manualslib.com/manual/843561/Perkins-400-Series.html?page=16

Title: Re: Exhaust Manifold Nut Torque Specifications on W40
Post by: SVJourney on November 02, 2020, 05:52:58 AM

I would check those before using them. For instance, the exhaust bolt values are for bolts, not nuts. They list as M10, which is 10mm and the 4-107 uses standard sizes.
I don't bother to try and torque the exhaust. Use new gaskets and snuggle them down with a wrench.

Pearson 365 and 367

Document Library - Manuals, Specifications, Service Bulletins => Engine - Non Specific => Topic started by: Ruvel on October 30, 2020, 02:04:13 PM