Fume smell within cabin

[MrMoots]

Hi

I have just brought my first Porsche a 1990 964 C2.

All is well apart from an aroma of exhaust fumes when I have the heater on for more than a few minutes. The fumes are not too bad until you slow down, say for a roundabout, then they become very noticeable.

I presume that it is a problem with the heat exchangers. I cannot detect any blowing from the exhaust from outside the car, but if the hole is within the heat exchanger section, then would this be noticeable?

I take it that there is no way of determining which exchanger it maybe that is at fault?

Is there anything else that maybe causing this problem? It looks like a relatively easy job to change the exchangers myself.

Any help or advice much appreciated?

Regards

Ross

 

[Manipoe]

Could be the big orange pipes that connect the exchanger to the interior, when they get old they perish and become britlle, easy to check and could save you ££'s if that is the problem...

 

[Jeff Forsyth]

Yes, the big orange pipes (snap). Also, if it turns out to be the heat exchangers, please noe the coments on the topic.

Sincerely