FE Power Forums

FE Power Forums => FE Technical Forum => Topic started by: Jb427 on October 25, 2020, 02:23:11 AM

Title: BBM cast iron Block torque specs
Post by: Jb427 on October 25, 2020, 02:23:11 AM

Is the BBM iron block main and cross bolt torque spec's the same as a std 427 cross bolted block? The BBM has 7/16 cross bolts being larger then std?.

Title: Re: BBM cast iron Block torque specs
Post by: blykins on October 25, 2020, 04:44:00 AM

It’s different because the fasteners are different.  I use 110 on the mains and 55 on the side bolts.

Title: Re: BBM cast iron Block torque specs
Post by: Jb427 on October 25, 2020, 05:46:24 AM

I thought so Thanks

Title: Re: BBM cast iron Block torque specs
Post by: BattlestarGalactic on October 25, 2020, 08:28:58 AM

The sheet I have says

Mains: 35-70-110  (3 steps)
Sides: 30-65   (2 steps)

Title: Re: BBM cast iron Block torque specs
Post by: blykins on October 25, 2020, 08:50:55 AM

Whoops, yes, 65, fat fingered the 55, laying in bed using my phone.

I do use 3 steps on the side bolts too though out of habit.