Decided to pull the heads and this explains my overheating issue. Heads are going to the shop this week for some TLC, I’ll probably need the block dipped too.

 

I'm seeing plugged water jackets, right?

 

Looks like loads of stuff plugged up - at least 75% of the coolant passages across the head gaskets.

 

Looks normal to me, the gaskets have various sized restricting holes, to make sure all of the block and heads get proper coolant flow.

Having said that, it does look like the block could use a thorough flushing.

Roger.

 

Agreed.

 

 

Definitely need to hot tank block, even the blocked passages have water jackets around cylinders.

 

Took the heads to the shop today - on closer examination there are several obvious points of failure across the gasket(s). So the heads are being R&R'ed and I'll flush the block while it's out.

 

Check the block for warped decks while the heads are off.

What were the overheating symptoms?. Did it overheat because the gaskets were bad, or did the gaskets let go because of overheating?.

Let us know, plenty of first class help and knowledge here, but the more information you give us, the better everyone can help.

Roger.