1974 John Deere 4430 blocker heater removal (old style)

This is a narrow, hands-on repair video showing an owner removing the old-style block heater element from a 1974 John Deere 4430 after it twisted off inside the block. He walks through the taper fit, O-ring, snap-ring piece stuck in the block, and the penetrating-oil-and-wiggle technique needed to extract it, plus a quick note on the newer-style replacement. Best for owners of this engine doing the same job, not a general tractor overview.

Posted by the Bernard Olson channel, an owner working through his own repair rather than a dealer or reviewer.