Quote:
Originally Posted by Bob B.
The DH 478 listed is the infamous Toroflow. It was a diesel version of the GMC V-6. Rare now, and very tough to find parts for.
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One of our neighbors bought one of these years ago (mid 70's) that had swallowed a valve. Remarkably, there was no damage to the cylinder wall. They replaced the piston and both valves in that cylinder and ran it for years until it finally spun a rod bearing. Slow as snot but didn't know what a load was.