White smoke from your exhaust almost always indicates a blown head gasket, and just like there is coolant mixed with your engine oil, there will also be engine oil mixed with your coolant. It will be up to you and/or your mechanic to not just perform the head gasket repair, but to do the necessary forensic diligence to fix it for good!
004 inch) between the aluminum cylinder head, the MLS gasket, and the iron deck surface caused a breach that eventually allowed coolant to enter the cylinder. The subsequent lack of supporting material (a mere. In this photo, the passenger-side head gasket on this 5.7-liter Hemi failed because during a previous repair the dealership used a high-speed abrasive disc to clean an aluminum cylinder head sealing surface designed for an MLS gasket-a big no-no. Replacing the damaged head gasket, while expensive, is only half the battle.
Cracked engine blocks are exceedingly rare because the head gasket seal is designed to fail before the block fails, making head gasket failure the predominant mode for white smoke from the exhaust (cracked cylinder heads are slightly more common, and we'll discuss those unique cases later). There are only two ways that can happen: a crack in the engine (block or cylinder head) or a breach in the head gasket seal. White smoke from the exhaust means there is an opening in the cooling system that exposes coolant to the high pressure and temperature of the combustion process.
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