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My exhaust is a funny colour !

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  • 04-03-2005 4:47pm
    #1
    Kristok
    Closed Accounts Posts: 2,464 ✭✭✭


    What would be making my exhaust go white, filled up the tank yesterday and noticed when i got home my exhaust is fairly white like white smoke and the exhaust is usually not visable in day light at least.

    Car is running fine sounds the same, could it be the petrol or maby low on oil or something like that ?!?


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    #2
    mike65
    Closed Accounts Posts: 88,978 ✭✭✭✭mike65


    Oooooooh! White smoke is not a good sign as a rule. It usually indicates a blown head gasket, the white is from oil and coolant mixing. Check to see if you can spot oil in the coolant header tank (it'll be a film floating on the surface) and look inside the oil filler cap for "mayo".

    Mike.


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    #3
    Seth Brundle
    Moderators, Politics Moderators Posts: 39,728 Mod ✭✭✭✭Seth Brundle


    How long was the drive you took - are you sure you are not just seeing condensation smoke?


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    #4
    mike65
    Closed Accounts Posts: 88,978 ✭✭✭✭mike65


    Oh yeah, better ask this - petrol or diesel?

    Mike.


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    #5
    Kristok
    Closed Accounts Posts: 2,464 ✭✭✭Kristok


    its petrol, i drove a fairly short distance and noticed it when i was opening the driveway gate thought it was weird then saw it today and knew it was a bit weird. Usually i never see my exhaust unless its really cold etc.


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    #6
    AMurphy
    Closed Accounts Posts: 1,237 ✭✭✭AMurphy


    White "smoke" with a cold exhaust is to be expected. So first heat it up well. Then if you still have white "smoke"... it's steam, probably from a blown HG.
    or inlet manifold gasket, if it's a carb with an inlet heater channel fed directly off the head water jacket.


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    #7
    Kristok
    Closed Accounts Posts: 2,464 ✭✭✭Kristok


    are any of them things i need to be really really worried about ?!? im hoping to trade it in against a newer car in a few months time is it likly to cease up before then or anything ?!?

    Obviously just looking for general idea not expecting a blind diagnosis from anyone, for all i know its been like this forever and im only coping it now.


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    #8
    AMurphy
    Closed Accounts Posts: 1,237 ✭✭✭AMurphy


    Hard to tell. You did not confirm if the "white smoke" is only when cold or always?.
    and is the "white" smore of the color of the ash on the inside of the exahust pipe (tail pipe)?.

    OTOH, if it has been exuding while smoke for months.... surely you have noticed it needs water regularly?. If not... Then oil perhaps?. and it's prpbably not while but blue.

    An engine that is not using (loosing) water or oil on a grand scale is unlikely to run plumes of white or blue smoke.

    and/or the oil or water is mixture of oil and water.....
    so get some better details on your engine fluids.

    Including the brake fluid... cause a leak of brake fluid into the vacuum booster could also cause "smoke" as well as pretty poor brakes.

    PS, what year/age and make/model/color vehicle are we addressing anyway.


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