40mm rod bearings question

User avatar
Rogue-AE95
Club4AG Expert
Posts: 493
Joined: Thu Jan 10, 2013 4:03 pm
Location: Tampa Bay, FL

40mm rod bearings question

Postby Rogue-AE95 » Sun Oct 10, 2021 8:31 am

I'm posting this here because it's something relating to the 4A-FE and the early 4A-GE. Both gens of 4A-FE rods and of course early bigport GE rods have 40mm big ends. But the bearing part numbers are different. Any ideas why that is?

Mark 1 bearings used as examples.

4A-FE:
13041-15030-01 (superseded by 13041-15031-01)

4A-GE:
13041-16040-01

Is it something about the GE bearings being for higher RPM / "race use?" Are the rod IDs slightly different? Rod widths are different?
'88 Corolla All-Trac x2 (manual, auto)

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 2180
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: 40mm rod bearings question

Postby oldeskewltoy » Fri Nov 05, 2021 8:47 am

buy a set of each and tell us............
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

davew7
Club4AG Expert
Posts: 232
Joined: Fri Jun 06, 2014 4:34 am
Location: Michigan

Re: 40mm rod bearings question

Postby davew7 » Sat Nov 06, 2021 5:23 am

If you visit the Mahle/clevite web site, they indicate the same P/N CB1361P bearing for both motors.

User avatar
Rogue-AE95
Club4AG Expert
Posts: 493
Joined: Thu Jan 10, 2013 4:03 pm
Location: Tampa Bay, FL

Re: 40mm rod bearings question

Postby Rogue-AE95 » Mon Nov 08, 2021 5:43 pm

Thanks Dave. It's odd that Toyota changed the part number if the parts themselves did not change.
'88 Corolla All-Trac x2 (manual, auto)

davew7
Club4AG Expert
Posts: 232
Joined: Fri Jun 06, 2014 4:34 am
Location: Michigan

Re: 40mm rod bearings question

Postby davew7 » Tue Nov 09, 2021 4:37 am

It is common for OEM,s to change part numbers when they change suppliers, just for tracking/tracing. We will possibly never know why the P/N change.