kossuth

iTrader: (12)

Have a Gen III 5.7 aluminum block and a Gen III iron 5.3 block that have been setting in my shed for about 10 years at this point. Kids, family, and kids college have gotten in the way of my fun. While everything is good and fogged with oil I have a feeling I mixed up the main caps. They are all together as in a proper set but I can’t recall if the set in the right side box was for the aluminum or iron block etc.

Any easy tells or am I gonna have to snug them up and run a dial bore in the bearing bores to figure out which is which?

Che70velle

iTrader: (6)

Snug them up and measure is the only way of knowing. They will look identical most likely.

grinder11

iTrader: (1)

I agree. If OP removes the bearing shells, then torques them down, he should find that the parting lines are VERY close if the correct cap is on the correct saddle. However, if they weren't marked/numbered front to rear, it will make things a lot more difficult. A dial bore gage would also be a great asset......