Mercruiser 470 - heat exchanger removal

Blueghost924

Petty Officer 1st Class
Joined
Sep 19, 2013
Messages
250
With the old Mercruiser 470 heat exchangers, has anyone every had it be almost impossible to get a socket into that recessed center nut? The 2 outer left and right ones are a breeze. I thought about removing the left and right clamps to see if the heat exchanger itself can be taken off the mount, but it won't come off. I just can't seem to get enough leverage with my socket driver to get force on it to move (even with a swivel).
 
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