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ricelake922's avatar
ricelake922
Explorer
Aug 20, 2019

White smoke from exhaust

Hello. I have a 1986 Monaco Dynasty. I was 3 hours into a trip when I noticed while smoke coming from exhaust. This smoke only occurs when accelerating. The coolant is full, the transmission fluid is topped off and the oil is at a good level. I changed the oil 2 months ago and had the oil analyzed with out issue. I changed the fuel filters in September of last year prior to storage. Once I diagnosed the issue, I continued to drive and about 5 minutes into driving the white smoke from exhaust ceased. However when I arrived at my destination and used brake white smoke appeared again from exhaust and stopped again when driving to my spot at the park I was staying at. I would appreciate any thoughts, ideas, suggestions etc.
Thank you in advance.
  • It's always been my experience that white smoke means moisture is in the combustion chain and is steaming off. Could be simply that some condensation built up in the cylinders between uses, or it could mean that coolant water is getting past the head gasket. If that's the case, the oil will likely look like a chocolate milkshake. Black smoke usually indicates a rich condition, and blue smoke usually means it's burning oil.
  • It's been a while since I've dealt with this, but isn't white smoke an indication that gas is not burning off correctly. In other words, the engine is running to rich with gas.

    Black smoke is an indicator that motor oil is leaking into the engine and burning, causing the smoke to be black.

    There is another possibility, on vehicles with automatic transmissions, if the transmission fluid is dripping on the hot exhaust pipe, the transmission fluid will vaporize and turn into white smoke. Although, that won't be coming from your exhaust pipe and when that happens, it looks like the entire vehicle is on fire. Happened to me once, scared the bee-jee-beers out of me!

    Well, that's my input for the day. :)