Maximum diameter of the main bearing cavities

Discuss all things Model T related.
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules

Topic author
Dave1
Posts: 83
Joined: Sat Jan 12, 2019 12:01 pm
First Name: Dave
Last Name: Eddie
* REQUIRED* Type and Year of Model Ts owned: 1926 Tudor, 1926 Touring, 1931 Plymouth PA, 1952 Hudson Hornet
Location: Lillooet BC. Canada

Maximum diameter of the main bearing cavities

Post by Dave1 » Mon Dec 18, 2023 6:57 pm

Wondering how far can you bore out the main bearing saddles, on not effect the process of pouring Babbitt?
The concern is if you expose the bolt holes the molten Babbitt will leak out

User avatar

Mark Gregush
Posts: 5370
Joined: Sat Jan 05, 2019 1:57 pm
First Name: Mark
Last Name: Gregush
* REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1948 F2 Ford flat head 6 pickup 3 speed
Location: Portland Or
Board Member Since: 1999

Re: Maximum diameter of the main bearing cavities

Post by Mark Gregush » Mon Dec 18, 2023 7:26 pm

When the Model A crank is used, you do cut into the top bolt holes just a little. When babbitt is poured, the bolt or locating pins will block most of the hole so only a little babbitt will get in. After the mold is removed, that can be drilled out. If needed, the putty used for blocking and damming when pouring babbitt could be used as needed.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1948 Ford F2 pickup


Erik Barrett
Posts: 531
Joined: Mon Jan 07, 2019 12:32 am
First Name: Erik
Last Name: Barrett
* REQUIRED* Type and Year of Model Ts owned: 1913 speedster 1924 touring 1925 dump truck
Location: Auburn, Ca.

Re: Maximum diameter of the main bearing cavities

Post by Erik Barrett » Mon Dec 18, 2023 9:16 pm

What Mark said. For a stroker crank job you have to hog the T block all the way out to the bolt holes. Before pouring I plug the holes up to prevent leaks.


Topic author
Dave1
Posts: 83
Joined: Sat Jan 12, 2019 12:01 pm
First Name: Dave
Last Name: Eddie
* REQUIRED* Type and Year of Model Ts owned: 1926 Tudor, 1926 Touring, 1931 Plymouth PA, 1952 Hudson Hornet
Location: Lillooet BC. Canada

Re: Maximum diameter of the main bearing cavities

Post by Dave1 » Mon Dec 18, 2023 9:35 pm

Thanks for the tips


Kerry
Posts: 1447
Joined: Mon Jan 07, 2019 2:42 pm
First Name: Frank
Last Name: van Ekeren
* REQUIRED* Type and Year of Model Ts owned: 1916 touring, 1916 pick-up, 1924 coupe, 1926 touring, 1927 touring
Location: Rosedale Vic Australia

Re: Maximum diameter of the main bearing cavities

Post by Kerry » Mon Dec 18, 2023 10:56 pm

Just the smallest of a hole will run hot babbitt like a river, the best plug I've found is house hold aluminium foil in the oil holes and exhaust sealer around the out side of the molds.


Topic author
Dave1
Posts: 83
Joined: Sat Jan 12, 2019 12:01 pm
First Name: Dave
Last Name: Eddie
* REQUIRED* Type and Year of Model Ts owned: 1926 Tudor, 1926 Touring, 1931 Plymouth PA, 1952 Hudson Hornet
Location: Lillooet BC. Canada

Re: Maximum diameter of the main bearing cavities

Post by Dave1 » Mon Dec 18, 2023 11:27 pm

Kerry,
Aluminum foil I will have, exhaust sealer are you referring to header wrap or gasket material?

Dave


Kerry
Posts: 1447
Joined: Mon Jan 07, 2019 2:42 pm
First Name: Frank
Last Name: van Ekeren
* REQUIRED* Type and Year of Model Ts owned: 1916 touring, 1916 pick-up, 1924 coupe, 1926 touring, 1927 touring
Location: Rosedale Vic Australia

Re: Maximum diameter of the main bearing cavities

Post by Kerry » Tue Dec 19, 2023 2:17 am

Dav
I use a high temp paste made in Newzealand by CRC, it seals hard as soon as I heat the block saddles, caps or rods with a 1" propane torch before poring babbitt.
000_1122.JPG
000_0958 (1).JPG
000_0953 (1).JPG
/attachment]
Attachments
000_0957 (1).JPG


Topic author
Dave1
Posts: 83
Joined: Sat Jan 12, 2019 12:01 pm
First Name: Dave
Last Name: Eddie
* REQUIRED* Type and Year of Model Ts owned: 1926 Tudor, 1926 Touring, 1931 Plymouth PA, 1952 Hudson Hornet
Location: Lillooet BC. Canada

Re: Maximum diameter of the main bearing cavities

Post by Dave1 » Tue Dec 19, 2023 11:01 am

Thanks Kerry,
This will be my first crack at pouring Babbitt, thanks for the tips

User avatar

Mark Gregush
Posts: 5370
Joined: Sat Jan 05, 2019 1:57 pm
First Name: Mark
Last Name: Gregush
* REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1948 F2 Ford flat head 6 pickup 3 speed
Location: Portland Or
Board Member Since: 1999

Re: Maximum diameter of the main bearing cavities

Post by Mark Gregush » Tue Dec 19, 2023 12:16 pm

I have been using/doing the same as Kerry, but different brand.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1948 Ford F2 pickup


Topic author
Dave1
Posts: 83
Joined: Sat Jan 12, 2019 12:01 pm
First Name: Dave
Last Name: Eddie
* REQUIRED* Type and Year of Model Ts owned: 1926 Tudor, 1926 Touring, 1931 Plymouth PA, 1952 Hudson Hornet
Location: Lillooet BC. Canada

Re: Maximum diameter of the main bearing cavities

Post by Dave1 » Tue Dec 19, 2023 1:44 pm

Mark,
Which brand do you use?

User avatar

Mark Gregush
Posts: 5370
Joined: Sat Jan 05, 2019 1:57 pm
First Name: Mark
Last Name: Gregush
* REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1948 F2 Ford flat head 6 pickup 3 speed
Location: Portland Or
Board Member Since: 1999

Re: Maximum diameter of the main bearing cavities

Post by Mark Gregush » Wed Dec 20, 2023 1:32 am

Adding new post to bump up.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1948 Ford F2 pickup

User avatar

Mark Gregush
Posts: 5370
Joined: Sat Jan 05, 2019 1:57 pm
First Name: Mark
Last Name: Gregush
* REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1948 F2 Ford flat head 6 pickup 3 speed
Location: Portland Or
Board Member Since: 1999

Re: Maximum diameter of the main bearing cavities

Post by Mark Gregush » Wed Dec 20, 2023 11:08 pm

Permatex Muffler & Tailpipe Sealer #80335
Not sure if water base or not, the package does not say, it is water cleanup. I found best is to make sure it is fully dried before pouring the babbitt.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1948 Ford F2 pickup


Topic author
Dave1
Posts: 83
Joined: Sat Jan 12, 2019 12:01 pm
First Name: Dave
Last Name: Eddie
* REQUIRED* Type and Year of Model Ts owned: 1926 Tudor, 1926 Touring, 1931 Plymouth PA, 1952 Hudson Hornet
Location: Lillooet BC. Canada

Re: Maximum diameter of the main bearing cavities

Post by Dave1 » Thu Dec 21, 2023 2:31 pm

Thanks Mark

Post Reply Previous topicNext topic