RoverV8 main cap side clearance.

[cinquecento]

On the 4.0/4.6 cross bolted block, there is a very slight ridge and the base where the main caps are located. This has the effect of providing a clearance between the side of the main cap on the block (abt 0.004"), which is reduced when the actual cross bolt is tightened.

I'm curious why the gap is there in the first place..is it to accommodate the different expansion rates between the alloy block and steel main cap?

[HJG]

Confusingly worded. Do you have a photo?

[Boosted LS1]

If you torque up the mains the crank usually goes tight until you tighten the cross bolts. I wonder why that could be? Oh, additional clearance you say?

[cinquecento]

[Boosted LS1]

Nice and tight :-)