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wjohn 
Orange Level
Joined: 19 Jan 2010
Location: KS
Points: 1913
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 Topic: WD Engine - Main Bearing Caps Matching
Posted: 09 Oct 2022 at 11:58am |
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On a WD (and I assume at least WC as well), do you need to keep the main bearing caps that were original to the block, with that specific block? Or, can you swap main bearing caps from one block to another without any issues?
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1939 B, 1940 B, 1941 WC, 1951 WD, 1952 CA, 1956 WD-45
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 80257
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Posted: 09 Oct 2022 at 12:40pm |
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Would be best to keep original.. If you HAVE to change out, i would bolt the cap on empty and check for any LIP or overlap at the mating surfaces... You may have to mix and match to get a better FIT.
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Like them all, but love the "B"s.
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DrAllis
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Joined: 12 Sep 2009
Points: 20207
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Posted: 09 Oct 2022 at 2:19pm |
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If someone gives you a WC/WD block without main caps, it's too expensive to line-bore it even if you had main caps from another block. I'm just sayin......
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wjohn
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Joined: 19 Jan 2010
Location: KS
Points: 1913
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Posted: 09 Oct 2022 at 3:07pm |
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Got it - avoid mixing caps and blocks if they didn't come together from the factory. Thanks guys.
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1939 B, 1940 B, 1941 WC, 1951 WD, 1952 CA, 1956 WD-45
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den/southern illinoi
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Joined: 11 Sep 2009
Location: Sparta, Illinoi
Points: 1971
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Posted: 09 Oct 2022 at 4:55pm |
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I know I always keep the caps in the same location as they were. Den
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Own 4 wheel 20, 2-5015, 5020 and associated equipment and 2 electric forklifts.
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 80257
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Posted: 09 Oct 2022 at 6:09pm |
If you switch caps with another motor, it is POSSIBLE that the bore in the cap and the bock could be miss matched by .005 inch.. and you would have bearing interference with the crank when you install... of course it could be miss matched .001 and would probably work...... Thats why it is not a good idea to mix and match.. but if you dont have the original caps, you need to check the alignment of the two half bores and make sure the offset is very minimal.
exaggerated it could look like this...
Edited by steve(ill) - 09 Oct 2022 at 6:15pm
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Like them all, but love the "B"s.
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