#21-24 are the mains. STD, .25mm, .50mm over.
Volvo machines the block/intermediate section, measures the holes.
Volvo machines the crank, measures the round things.
There is a stamped guide on the block and crank, all letters.
The first letter of each is #1 main to the front, cylinder 1 end, and go to rear engine end.
There are 3 colors red,yellow, blue. Using the chart the upper/lower may be the same color or mix of colors.
The next thing is, I forgot how to read this chart to get the correct main bearing matchups.
If I find it, I will post it.
Hopefully others here will know how or remember how to read this.
Looking in Volvopartswebstore.com these are still available.
7 Big-end bearing kit 5.00 30731538 STD
Big-end bearing kit 5.00 30731539 O.S 0.25 mm
Big-end bearing kit 5.00 30731540 O.S 0.50 mm
Rod bearing, upper 1.00 NS
Rod bearing, lower 1.00 NS
21 Main bearing, red, upper, Without flange 1.00 8687951
Main bearing, yellow, upper, Without flange 1.00 8687952
Main bearing, blue, upper, Without flange 1.00 8687953
Main bearing, red, upper, Without flange 1.00 31251799 O.S 0.25 mm
Main bearing, yellow, upper, Without flange 1.00 31251800 O.S 0.25 mm
Main bearing, blue, upper, Without flange 1.00 31251801 O.S 0.25 mm
Main bearing, red, upper, Without flange 1.00 31251802 O.S 0.50 mm
Main bearing, yellow, upper, Without flange 1.00 31251803 O.S 0.50 mm
Main bearing, blue, upper, Without flange 1.00 31251804 O.S 0.50 mm
22 Main bearing, red, lower, Without flange 1.00 8687961
Main bearing, yellow, lower, Without flange 1.00 8687962
Main bearing, blue, lower, Without flange 1.00 8687963
Main bearing, red, lower, Without flange 1.00 31251805 O.S 0.25 mm
Main bearing, yellow, lower, Without flange 1.00 31251806 O.S 0.25 mm
Main bearing, blue, Without flange 1.00 31251807 O.S 0.25 mm
Main bearing, red, lower, Without flange 1.00 31251808 O.S 0.50 mm
Main bearing, yellow, lower, Without flange 1.00 31251809 O.S 0.50 mm
Main bearing, blue, lower, Without flange 1.00 31251810 O.S 0.50 mm
23 Flange bearing, red, upper, With flange 1.00 31216061
Flange bearing, yellow, upper, With flange 1.00 31216062
Flange bearing, blue, upper, With flange 1.00 31216063
Flange bearing, red, upper, With flange 5.00 31251600 O.S 0.25 mm, CH -599999
Flange bearing, red, upper, With flange 1.00 31251606 O.S 0.25 mm, CH 600000-
Flange bearing, yellow, upper, With flange 1.00 31251601 O.S 0.25 mm, CH -599999
Flange bearing, yellow, upper, With flange 1.00 31251607 O.S 0.25 mm, CH 600000-
Flange bearing, blue, upper, With flange 1.00 31251602 O.S 0.25 mm, CH -599999
Flange bearing, blue, upper, With flange 1.00 31251608 O.S 0.25 mm, CH 600000-
Flange bearing, red, upper, With flange 1.00 31251609 O.S 0.50 mm
Flange bearing, yellow, upper, With flange 1.00 31251610 O.S 0.50 mm
Flange bearing, blue, upper, With flange 1.00 31251611 O.S 0.50 mm
24 Flange bearing, red, lower, With flange 1.00 8642491
Flange bearing, yellow, lower, With flange 1.00 8642492
Flange bearing, blue, lower, With flange 1.00 8642493
Flange bearing, red, lower, With flange 1.00 30677101 O.S 0.25 mm
Flange bearing, yellow, lower, With flange 1.00 30677102 O.S 0.25 mm
Flange bearing, blue, lower, With flange 1.00 30677103 O.S 0.25 mm
Flange bearing, red, lower, With flange 1.00 31251612 O.S 0.50 mm
Flange bearing, yellow, lower, With flange 1.00 31251613 O.S 0.50 mm
Flange bearing, blue, lower, With flange 1.00 31251614 O.S 0.50 mm
