Please pardon our dust while we improve the website over the next few days.  If you need anything please feel free to call 616-301-2888 or email Mike.  Thank you!

Q & A: Heater Box

Mr. Twist -
I recently put a complete new heater box/core assembly (purchased from Moss) into my '69 B Roadster. As you know, it's not a fun job, especially getting the cable hooked up to the flapper valve on the bottom of the box. Now, it appears that there is a pinhole leak in the core that's causing steam to rise out of the cowl vent and the defrost outlets (there's no other reason for the steam) .... this did not make me happy. Now I have to pull it out again and verify the leak, though of course Moss is happy to replace it or pay for the repair. My question to you is, is there any way to get the core out of the box without having to completely pull the box out of the car? Is it possible to
get the front cover off the box and pull the core out? I'll bet this is a common question! If it's not possible, do you have any tricks that will help when it comes time to reassemble? Just fyi, the easiest way I found to do it was to pull the cable out of the sheath and attach to the heater box before putting the box into the car. When you put the heater box in, thread the cable core thru and under the dash. This pretty much solves the problem of kinking the cable if it's attached when you install the box. Then, it's possible to slide the sheath onto the cable and into the clamp on the bottom of the box. It's much easier
to get at the clamp that holds the sheath than it is to get at the one that anchors the cable core!

Thanks for your time.

Roger Hotelling

ROGER!

This information arrives late for your use, I know. The most common reason for a leak into the heater box is a loose hose connection at the front. When the hose is loose and anti-freeze leaks, it doesn't drip DOWN th... read more