Broken boss

Reply Subscribe

Thread Tools

Search this Thread

Dec 2, 2023 | 12:20 PM

john jamieson

Thread Starter

Cargo Master

Joined: Jul 2015

Posts: 2,068

Likes: 138

From: tucson

Broken boss

I'm in the process of installing the bell housing. While torqueing the 6 bolts that hold it to the block, the lower right boss cracked in half and fell off. The flange is still on the block, just the raised threaded portion broke in half. This is in my '64 F250 that had a 390 swapped into it.
Do I worry about it? This truck doesn't get a lot of use.
Thanks. John

Dec 2, 2023 | 04:10 PM

DaveMcLain

Cargo Master

Joined: Oct 2020

Posts: 2,676

Likes: 785

Would it be possible to use a longer bolt and put a nut on the back side?

Dec 2, 2023 | 06:10 PM

john jamieson

Thread Starter

Cargo Master

Joined: Jul 2015

Posts: 2,068

Likes: 138

From: tucson

I'm not sure. It's the one below the starter. There isn't much room and it runs along the side the block. Maybe if I drill out the threads and am able to keep the broken piece in place, as a spacer.

Dec 2, 2023 | 06:49 PM

DaveMcLain

Cargo Master

Joined: Oct 2020

Posts: 2,676

Likes: 785

The easiest and best way to repair the block would be to braze up a new boss and then redrill and tap a new bolt hole in the right location.

Dec 2, 2023 | 06:55 PM

runthatjunk

More Turbo

Joined: Nov 2009

Posts: 525

Likes: 274

From: Kansas

It'll be fine. Unless it was cracked before hand it shouldn't have broke though, you sure everything is drawing together flat? That would be my only concern