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Message: [QUOTE="golfer, post: 403283, member: 266"] drain the oil from the pan, then put compressed air into the cooling system... bar the engine over by the 24mm nut on the crank...and see if you see/hear air escaping out the oil pan drain hole when certain pistons are in certain locations within their respective bores... it's possible that there is a hairline crack in one of the cylinder walls. the alternative way would be to put air pressure INTO each cylinder (individually, through the glowplug hole)...and bar the engine over to see which cylinder allows air to make it's way back into the coolant jug... this would specify which cylinder has the problem, and would rule out a cylinder head gasket...since the gasket would leak, regardless as to the position of the piston in the cylinder... good luck [/QUOTE]

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