Need help finding main bearing set replacement (1 Viewer)

[wwjdg2tp]

I have an ‘81 BJ42 with a 13B. I believe I need to replace the main bearings but I need guidance how to identify the main bearing specs for correct replacement as well as where to locate preferably OEM main bearing replacements. I don’t know the month or year of the engine. Here are some photos of the bottom end and bearings -one photo has a T5B marking on the bearing. Does that provide any relevant information? Any help would be greatly appreciated.View attachment 3394636View attachment 3394617

 

[veiloctane]

I have an ‘81 BJ42 with a 13B. I believe I need to replace the main bearings but I need guidance how to identify the main bearing specs for correct replacement as well as where to locate preferably OEM main bearing replacements. I don’t know the month or year of the engine. Here are some photos of the bottom end and bearings -one photo has a T5B marking on the bearing. Does that provide any relevant information? Any help would be greatly appreciated.View attachment 3394636View attachment 3394617View attachment 3394670View attachment 3394671View attachment 3394673

View attachment 3394597

I believe to determine which ones you need you need to get a standard set first then check with a plastic gauge and go from there if you are out of spec you have to buy another set and go from there.

some helpful info here in this link

3B main/con rod bearing swap pictures!

I'm pulling a lostmarbles here and made a thread before I've done the work. :D I'm going to pull the pan tonight when I get home form work and give it an evening or maybe all night to drain so, hopefully, I get less oil in my face. But before I get going, post up any tips you have. For...

forum.ih8mud.com

 

[Smithtec]

You can get Taiho bearings from magengines.com. Your bearing doesn't look bad to me, not enough wear to grind the crank, although I can't see what the crank journals look like. Most likely you'll want standard bearings.

 

[wwjdg2tp]

I believe to determine which ones you need you need to get a standard set first then check with a plastic gauge and go from there if you are out of spec you have to buy another set and go from there.

some helpful info here in this link

3B main/con rod bearing swap pictures!

I'm pulling a lostmarbles here and made a thread before I've done the work. :D I'm going to pull the pan tonight when I get home form work and give it an evening or maybe all night to drain so, hopefully, I get less oil in my face. But before I get going, post up any tips you have. For...

forum.ih8mud.com

Thank you so much.

 

[wwjdg2tp]

You can get Taiho bearings from magengines.com. Your bearing doesn't look bad to me, not enough wear to grind the crank, although I can't see what the crank journals look like. Most likely you'll want standard bearings.

I really appreciate that.