classicvin

Hello,

Is the Crank ladder (lower part of the block) Interchangeable with other engine blocks?

Its just i have a good block with a damaged lower crank ladder casing and i have a bad block with a good lower crank ladder casing.
So was obviously looking to swap them over to make a good engine out of 2!

Or are they specific to the engine block (i'm guessing they would be line bored)
Even if i checked all the bearing clearances and found them okay?

Or would it be more the crank not being central if a different crank ladder was used?


Any help would be much appreciated!

thanks!

fluffyninja

I don't have direct knowledge of F20C engines but............

It is similar to an engine I had a lot of experience of and that style of engine is normally machined as a matched pair to get the correct crank bore geometry. Change it and you'll likely have roundness/concentricity type issues between the two. That said if you've nothing to lose by having the two you could give it a try. If everything turns freely once it is tightened up you may have dropped lucky

wochi

You need to take them to a CNC shop to get them line bored.
If you dont you may have luck and all be ok or not and ruin both engines.
Line boring is not expensive so i would do it

classicvin

Thanks guys, thought that would be the case!

BenRNBP

If you use the main caps from the same, good ladder you should be fine (or have I missed something here ?)

/edit, yes I have - I understand now