Originally Posted by
wrinklearthur
My approach to clean those water jackets out while you can get at them, would be to fashion a scraper out of a piece of fencing wire with a hook bent on the end , scratch out the water ways and then hose out any loosened rubbish.
Change all the 'Welch' plugs and don't forget that one at the back of the engine.
The intake manifold is water heated and I have seen those corrode through from the water galley into the airway, 'beware' as that will hydraulic lock the piston, work out some way of pressure testing the water galley.
You will need a new fat 'O' ring between the water pump and the thermostat housing. .
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