Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 08-23-2013, 07:12 PM   #1
FirstA
Member
 
FirstA's Avatar
 
Join Date: Apr 2012
Location: Three Forks, MT 59752
Posts: 71
Unhappy Rear main question

This is a strange question I'm sure. Has anyone ever machined a rear bearing cap that requires long bolts so it can be used with the short bolts. There is a long story about what led to this question. Mostly me not paying attention during the engine rebuild.
FirstA is offline   Reply With Quote
Old 08-23-2013, 07:31 PM   #2
Kurt in NJ
Senior Member
 
Kurt in NJ's Avatar
 
Join Date: May 2010
Location: on the Littlefield
Posts: 5,488
Default Re: Rear main question

The reason for the long bolts is because the thicker cap is cast iron, the thin cap is forged steel, it is thicker for strength, the cast iron isn't as strong as the forged steel when it is thin. ---can you get away with it---or somewhere in between and use a different nut --possibly ---it's not that hard to find the longer bolts though
Kurt in NJ is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 08-23-2013, 07:55 PM   #3
ursus
Senior Member
 
Join Date: May 2010
Location: Oregon
Posts: 1,165
Default Re: Rear main question

If it's for lack of the shorter forged cap used on the early A's I might be able to help you out. E-mail me.
ursus is offline   Reply With Quote
Old 08-23-2013, 09:32 PM   #4
FirstA
Member
 
FirstA's Avatar
 
Join Date: Apr 2012
Location: Three Forks, MT 59752
Posts: 71
Default Re: Rear main question

My screw up was not noticed until the engine was installed and ran. A very bad rear main oil leak led me to find I had installed the wrong cap. Yes it was plasti guaged. I had 3 engines torn down looking for the best block. Just used the wrong rear main for assembly. Not wanting to pull the engine to change the bolts has me searching for an easy way out. Probably not one but I figured it won't hurt to ask.
FirstA is offline   Reply With Quote
Old 08-23-2013, 10:59 PM   #5
Kohnke Rebabbitting
Senior Member
 
Join Date: May 2010
Location: 60615,330th Ave.,Clare, Iowa, 50524
Posts: 1,456
Default Re: Rear main question

Quote:
Originally Posted by FirstA View Post
This is a strange question I'm sure. Has anyone ever machined a rear bearing cap that requires long bolts so it can be used with the short bolts. There is a long story about what led to this question. Mostly me not paying attention during the engine rebuild.
It wouldn't work any way.
Kohnke Rebabbitting is offline   Reply With Quote
Old 08-24-2013, 12:18 AM   #6
FirstA
Member
 
FirstA's Avatar
 
Join Date: Apr 2012
Location: Three Forks, MT 59752
Posts: 71
Default Re: Rear main question

Sponsored Links (Register now to hide all advertisements)
You mean it would be stupid to try?
FirstA is offline   Reply With Quote
Old 08-24-2013, 12:41 AM   #7
Kohnke Rebabbitting
Senior Member
 
Join Date: May 2010
Location: 60615,330th Ave.,Clare, Iowa, 50524
Posts: 1,456
Default Re: Rear main question

Quote:
Originally Posted by FirstA View Post
You mean it would be stupid to try?
I don't know about stupid, but there wouldn't be enough cast thickness left for strenghth to tighten the bolts with out breaking out the bolt holes, at some point.
Kohnke Rebabbitting is offline   Reply With Quote
Old 08-24-2013, 06:17 AM   #8
George Miller
Senior Member
 
George Miller's Avatar
 
Join Date: May 2010
Location: NC
Posts: 2,975
Default Re: Rear main question

I would not do it. all you are going to do is ruin a good cap. It is always best to do things the right way. In the end it will be faster.
George Miller is offline   Reply With Quote
Old 08-24-2013, 10:14 AM   #9
FirstA
Member
 
FirstA's Avatar
 
Join Date: Apr 2012
Location: Three Forks, MT 59752
Posts: 71
Default Re: Rear main question

Thanks for the replies everyone. I will pull the engine, put in the long bolts and do it right. Always the best way.
FirstA is offline   Reply With Quote
Old 08-25-2013, 06:46 AM   #10
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,480
Default Re: Rear main question

I thought the rear main could be pulled with the engine in place.

At least I thought so unless you have a counterweighted crank, then the counterweights would get in the way.
Tom Wesenberg is offline   Reply With Quote
Old 08-25-2013, 12:17 PM   #11
FirstA
Member
 
FirstA's Avatar
 
Join Date: Apr 2012
Location: Three Forks, MT 59752
Posts: 71
Default Re: Rear main question

I have to pull the engine to put in the long rear main bolts. Flywheel is in the way.
FirstA is offline   Reply With Quote
Old 08-25-2013, 01:00 PM   #12
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,480
Default Re: Rear main question

Quote:
Originally Posted by FirstA View Post
I have to pull the engine to put in the long rear main bolts. Flywheel is in the way.
Of course, ......I posted with too little sleep and was thinking of the bolts coming down instead of lifting up. Anyway, using the correct bolts as mentioned is the only way to do it.
Tom Wesenberg is offline   Reply With Quote
Old 08-25-2013, 06:42 PM   #13
FirstA
Member
 
FirstA's Avatar
 
Join Date: Apr 2012
Location: Three Forks, MT 59752
Posts: 71
Default Re: Rear main question

Thanks Tom. I was hoping you would come back with a - well all you have to do is - kind of message. I am just not excited battling the flywheel again. Doing anything tomorrow?
FirstA is offline   Reply With Quote
Old 08-25-2013, 07:26 PM   #14
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,480
Default Re: Rear main question

Quote:
Originally Posted by FirstA View Post
Thanks Tom. I was hoping you would come back with a - well all you have to do is - kind of message. I am just not excited battling the flywheel again. Doing anything tomorrow?
It's been too hot to work outside most of the day for the past week, and for this next week it's the same. If you have A/C in the garage it will be a nice job, but if you don't be sure to use fans and go slow. No use taking the fun out of it. haha
Tom Wesenberg is offline   Reply With Quote
Old 08-26-2013, 11:27 AM   #15
FirstA
Member
 
FirstA's Avatar
 
Join Date: Apr 2012
Location: Three Forks, MT 59752
Posts: 71
Default Re: Rear main question

Tom, our weather is a bit different here in Montana. Low humidity and it was 52 degrees outside this mourning. Garage stays cool all day. I am close to lifting the engine out so things are going good. Really hard tearing my A down when finishing the total rebuild is not too far away. Yes I am having fun!
FirstA is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 05:31 AM.