I have an occasional antifreeze smell in the car while driving and have learned about some o-rings that are part of the heater core. I have not been able to figure out where they go? My car is a souther car with most of the rubber on it ether dried out and hard or cracked, so I am working on the assumption that the O-rings are a good starting place. Has anyone ever replace them with out having to replace the heater? I will do that if need be, but I hope to skirt that job, as I hear it is a real pickle.
Thanks,
Jason

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46 WDX Power Wagon

84 300TDT daily driver

Make, model, year, please...

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ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

The Car is an '84 300 TDT. Sorry I ommited that important fact.

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46 WDX Power Wagon

84 300TDT daily driver

Heater Odor revisited
http://www.peachparts.com/shopforum/diesel-discussion/81445-heater-odor-revisited.html#post521301

dash/evaporator work
http://www.peachparts.com/shopforum/diesel-discussion/95331-dash-evaporator-work.html#post640418

Thank You Hunter, that gives me enough rope to hang myself. Guess I will have to try Barr's first

Jason

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46 WDX Power Wagon

84 300TDT daily driver

I suspect my 240D has a small heater core leak as well. From what I've read it looks like a nasty job. Let us know if Barr's or any other product works. I may have to try one.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL