1961-1979 Main Bearings .020 Oversize Case-Select Crank and Thrust Size
These .020 Oversize Main Bearings Sets are for 1200cc-1600cc engine cases that have been align bored 0.020 over the factory specs.
If your 1200cc-1600cc case has been align bored 0.020 (first 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.
If you are not sure of which bearings to select, check the Documents Tab for identifying each set.
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)
- 111 198 471T
- 111 198 473T
- 111 198 47702T
- 111 198 477T
- 111-198-461-A
- 111-198-471OS
- 111-198-473OS
- 111-198-475OS
- 111198471
- 111198471OS
- 111198473
- 111198473BR
- 111198473O2T
- 111198473OS
- 111198473X2
- 111198475
- 111198475OS
- 111198475X2
- 111198477
- 111198477OS
- 111198477OSS
- 111198479
- 111198481+2
- 686420268888
- 686420268895
- 756632182156
- 98-1471-A
- 98-1473-B
- 98-1475-B
- 98-1477-A
- 98-1770-A
- M1-4904TP 030
- M1-4904TP STD