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Open Roads Forum  >  Class A Motorhomes  >  Maintenance Issues & Tips

 > White smoke from exhaust

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ricelake922

Peterborough

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Posted: 08/20/19 05:32am Link  |  Quote  |  Print  |  Notify Moderator

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.

DutchmenSport

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Posted: 08/20/19 05:40am Link  |  Quote  |  Print  |  Notify Moderator

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. [emoticon]

10forty2

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Posted: 08/20/19 06:02am Link  |  Quote  |  Print  |  Notify Moderator

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.


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eHoefler

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Posted: 08/20/19 06:22am Link  |  Quote  |  Print  |  Notify Moderator

Bad injector


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rhagfo

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Posted: 08/20/19 06:31am Link  |  Quote  |  Print  |  Notify Moderator

eHoefler wrote:

Bad injector


X2


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2oldman

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Posted: 08/20/19 08:10am Link  |  Quote  |  Print  |  Notify Moderator

google, your issue

MountainAir05

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Posted: 08/20/19 02:52pm Link  |  Quote  |  Print  |  Notify Moderator

I agree with moisture is getting in the combustion chamber. If it there after a short trip then you have a leak somewhere. Also if you oil level is too high then it also could cause a white/grey color mist.

Chum lee

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Posted: 08/20/19 02:59pm Link  |  Quote  |  Print  |  Notify Moderator

What does the smoke smell like? Fuel? Coolant? Other? Is it oily (like smoke) or does it evaporate? (like water/moisture)

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SidecarFlip

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Posted: 08/20/19 05:19pm Link  |  Quote  |  Print  |  Notify Moderator

Is this a diesel or gas motor? Is it a Tier 4 engine and if it is and you have a DEF engine, you have a dosing issue. White smoke is an indication of over dosing with diesel exhaust fluid.


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Bird Freak

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Posted: 08/20/19 07:25pm Link  |  Quote  |  Print  |  Notify Moderator

SidecarFlip wrote:

Is this a diesel or gas motor? Is it a Tier 4 engine and if it is and you have a DEF engine, you have a dosing issue. White smoke is an indication of over dosing with diesel exhaust fluid.

DEF in a 1986 coach? Don't think so.[emoticon]
If gas I would look at coolant. If diesel check injectors.


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