Originally Posted by Twyzted
Thank you for all the info. I decided to just do head gaskets on my EJ25D. After much research and the info I got here, swapping would be far too time consuming and costly.
But has it overheated many times during the head gasket failure?
Suppose you replace the head gaskets & they never fail again.
The real issue would be how long were the internals (bearings) attacked w/overheating & the oil/coolant mix, which is extremely detrimental to the engine's internals, as opposed to the 251 block, which leaks externally with it's head gasket issues, not internally, so it wouldn't have any bearing issues & would still remain very reliable...