22-23 series heater

Posted by HH56 On 2013/10/27 8:56:09

Does anyone have photos or know how the core fits and air flow is routed inside the 22-23 series heater box. There is a poster on PAC forum who has cold air blowing into his 49 via heater ducting yet has good hot water flow thru core. He is looking for info on how this could be.

I know the 51 thru maybe 54 has the core lay flat over a plenum affair directly under the center of core. That plenum is part of the exit into car. Air comes in from the bottom and plenum covering the center of core forces air to go up thru core on the outer sides to area at top of box. It then does a 180 and flows back thru the center of core and into the plenum and outlet. Is the 22-23 done the same way? I'm thinking if the core is cocked or plenum has come loose the air could bypass the core and flow directly into car.

Any photos or first hand descriptions or suggestions would be most helpful to the gentleman. Also, does the box come apart the same as later -- held with sheet metal screws and one or two inaccessible on the firewall side?