Heater on... burnt oil smell?

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Cadillac Seville / Cadillac Eldorado Forum Discussion, Heater on... burnt oil smell? in Past Cadillac Vehicle Discussion; I just made the correlation. When the heater is on, (obviously when it's cold outside) the car has more of ...
  1. #1
    mtflight's Avatar
    mtflight is offline Cadillac Owners Connoisseur
    Automobile(s): 1999 White Diamond ETC
    Join Date
    Jan 2005
    Dallas, TX

    Heater on... burnt oil smell?

    I just made the correlation. When the heater is on, (obviously when it's cold outside) the car has more of a burning oil/plastic smell.

    When it's not on, the car does not smell this way.

    Is there somewhere I should be looking for this smell? I open the hood, and can't really smell it/find it.

    Any tips are appreciated!


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  3. #2
    sts96 is offline Cadillac Owners Fanatic
    Join Date
    May 2004

    Re: Heater on... burnt oil smell?

    Check for oil seepage at the lowerlip of the cam covers at the exaust manifolds and below the crank shaft seals.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: Heater on... burnt oil smell?

    Look closely at the HVAC box mounted on the firewall. They have been known to become brittle and crack. Even had large pieces fall out. If that happens, you draw underhood air to heat the cabin. If you have a leaky cam cover or such, that smokey air is being pumped into the cabin.

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