Leaking heater

[mikewest_08]

Does anyone know it have an idea as to why on my passenger around the heater box area it is leaking really bad? Only does it when it rains any amount really. It is an 86 t type.


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[Lil Truck]

There is a seal around the heater core box, it may be cracked?
When i replced my heater core I used black RTV to seal the box.

 

[asto-t]

Leaking windshield? Also seam sealer on firewall.

 

[mikewest_08]

Yes also windshield but in the coner on the other side. I need a seal there but thanks I'll check it out.


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[novaderrik]

the drain is probably clogged due to the heater box being full of almost 30 years of dirt and leaves... you can clean it out with a screwdriver from the engine bay... it's a little slot on the bottom of the heater box, close to the passenger side exhaust manifold.. kind of a pain to get in there, but after cleaning mine out i can stick a garden hose in the cowl and no more water leaks into the car..