Freshening up a 4.0 OHV

[.38spl]

I’m swapping an OHV4.0 from an Explorer into my 87 B2. Im in no hurry, and although the engine was driving in the vehicle prior to tear down, I plan on pulling it apart to check out the bearings, bored, etc, and to re-seal it. It has about 140,000 miles on it. Anything else 4.0 specific that I should look for while im in there?

 

[Dirtman]

They are pretty basic engines and not really any known problems that I know of...

 

[19Walt93]

A few had problems with heads cracking under the valve covers and oozing coolant into the oil like 2.9's did. The worse problem we had with 4.0 OHV's was oil leaking from the cork intake and valve cover gaskets which Ford eventually fixed with better gaskets.

 

[.38spl]

Thanks Dirtman and Walt. I know my way around a 2.9 pretty well, and thought that it was just a big 2.9. As for leaks, where I come from RTV is free, but oil is not. So there’s that!