I am having repetitive failures of new, OEM block heaters installed on
my M617 diesel engine (W123 300D).
My latest theory is that there must be metal in the water jacket of
the block (I may be "all wet" on this) or something else that is
shorting out these heating units.
Anyone have any thoughts on this, and/or any ideas on how to verify or
"flush" the block?
Thanks in advance for any info.