Main Bearing Sizes???
Thread Starter
7th Gear
Joined: Apr 2005
Posts: 7
Likes: 0
Main Bearing Sizes???
I need to replace the main bearings on a 350 for my 1977, but I do not know if the crank was modified at all. The main bearings have markings, but I can not find similar ones. the markings are:
D.A.B 97
8201 CAP-U
6-30 D
9-30 DA-49
I am not sure on the 9-30, the 9 is kind of worn.
What size do I need to purchase?
D.A.B 97
8201 CAP-U
6-30 D
9-30 DA-49
I am not sure on the 9-30, the 9 is kind of worn.
What size do I need to purchase?
Pro
Joined: Jun 2005
Posts: 540
Likes: 4
St. Jude Donor '09, '24
Is the engine and crank still in car? How many miles on old bearings? If high mileage might be better to take to machine shop and have crank cut. Will true up the journals and shop will tell you what size bearings to buy. Better oil pressure and volume will be one result of that proscess. If crank still in car can plastiguage mains and see if you can get oversize bearings to fit, houstonvett
Thread Starter
7th Gear
Joined: Apr 2005
Posts: 7
Likes: 0
The engine is a replacement for original that being bored and sleeved to keep it original etc., was a rebuild, 4 bolt that had 21K on it and the crank is a steel one that looks new. The rods are .010. Was hoping for easy fix on the bearing numbers but will plastiguage the bearings. Thanks
