Quote:
Originally Posted by kerry
There are a fair number of people here who think it is better to install a lower radiator hose heater rather than try to get out the block plug. I've done it on 2 MB's. Radiator hose heaters are almost as good as block heaters and only take about half an hour to install.
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I actually witnessed a guy that cracked the block of an OM615 while trying to remove the hex plug to install a block heater in the early 1980's.
He couldn't get the hex plug to budge and kept adding extensions to gain leverage, IIRC he finally added six foot pipe extension to a 3/4 inch ratchet for the ultimate in mechanical advantage... and broke the block!!
Sorry for the hi-jack, I'm not sure of the size of the allen hex bolt, I'd guess its 30-40mm.