Author Topic: heater box drain tube length?  (Read 172 times)

Offline dakota

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heater box drain tube length?
« on: August 30, 2017 - 06:28:39 am »
I was putting the last couple of firewall gaskets on the heater box for my a/c equipped 70 Challenger and realized that the drain tube that runs through the firewall had been broken off at some point in the past.   It turns out that 3/4" CPVC pipe has the same inside diameter as the original drain, so I sanded off what was left of the old drain, widened the hole in the box a bit with a Dremel, and then used JB Weld to secure the new drain in place.  If one of you can tell me how long the drain is supposed to be, I'd be grateful.   I want to cut the drain to length and paint if before installing the box in the car.   Based on the pictures I could find on the internet, something around 2" looks right but it's hard to tell for sure.

I'm not building a "numbers matching" car, so I'm mostly interested in making sure this drain is functional.   Thanks.

 

   




Offline dougs bs23

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Re: heater box drain tube length?
« Reply #1 on: September 01, 2017 - 01:28:41 pm »
had the same issue with my a c box and did exactly what you did with the cpvc pipe,  ran it about an inch and a half out the pit a 90 on it to turn it down.   purists wont like it but,  its my car
see Bill run  go Navy football///fly navy

Offline dakota

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Re: heater box drain tube length?
« Reply #2 on: September 02, 2017 - 10:29:20 am »
Thanks for the details.