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			...for all the suggestions and help. I measured 18mm but I think 3/4" would make sense. There is only a small lip in which to nest them which is why the originals are dished rather than cupped. It's interesting just the sump gasket managed to seal this in the past - but there was a lot of gunk built up in there. 
		
		
		
		
		
		
			Tony, have you tried the allen plugs? I would have thought they were too deep to fit. 
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	Film maker 42 FGT No8 (Aust) remains 42 FGT No9 (Aust) 42 F15 Keith Webb Macleod, Victoria Australia Also Canadian Military Pattern Vehicles group on Facebook https://www.facebook.com/groups/canadianmilitarypattern  | 
		
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