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Message: [QUOTE="golfer, post: 1073496, member: 266"] as much as I hate to agree/reiterate my point... you're more likely to have a cracked cylinder wall than a blown head gasket on a 7.3L. I've written a detailed diagnostic procedure for testing the block for a crack, without pulling the engine and magnafluxing or visual inspection...but don't have time to search for it. basically you'll drain the oil, leave the oil pan nut off... apply air pressure to your cooling system, and bar the engine over to see if coolant begins pouring out the oil pan drain hole... if you do have coolant coming out of the oil pan, with pressure on cooling system... you can isolate which cylinder it is, by pressurize each cylinder THROUGH the glow plug hole..and bar the engine over (with pressure to that cylinder)..you'll most likely find a point (in that cylinders piston position)...where the pressure will transfer to the cooling system, and then back to the oil pan (as you rotate the engine over< basically allowing the piston to 'direct' the pressure either back into the cooling system or back to the oil pan) [/QUOTE]

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