1961-1979 Main Bearings .060 Over Select Crank & Thrust Size 1200-1600cc
These .060 Oversize Main Bearings Sets are for 1200cc-1600cc engine cases that have been align bored 0.060 over the factory specs.
If your 1200cc-1600cc case has been align bored 0.060 (third cut) you need to choose the bearings to suit the grind on your crankshaft and also the amount of thrust that has been machined on your case from the dropdown menu.
Tech Note: Bearing Size is an issue that can be confusing. However, most of you are working with a re-manufactured case, a re-manufactured crank and re-manufactured rods. In other words, most likely all of your pieces for the short block assembly needed machine work. Therefore, your machinist will be able to inform you as to the measurements from standard that were necessary to machine from your components. On the Crank, he will give you a measurement that will be under standard; same for the rods. On the case side of the main bearings, he will give you a measurement that is over standard, a result of line boring your case if it was necessary. The thrust measurement from the standard applies only to the front main bearing. On the outside circumference of the bearing, there is a large groove that runs the full width. This is where the bearing fits on the case halves. This area of the case is subject to side loading (Thrust) and sometimes is damaged. If your case needs machine work here, the under standard size is what your machinist will tell you to obtain in a main bearing size.
Also known under these part numbers: (For reference only)
- 111198491OS
- 111198493OS
- 111198495OS
- 111198497OS