This is a 2 part question: 1) Does anyone have and can you give me, the directions to remove the Heater Core out of a 72 Mav w/o A/C. 2) Does anyone have a Chilton Manual that they'd like to sell. I see there is one on ebay right now and I"m going to try to get that one. But I thought perhaps one of you would have one laying around that you'd like to sell me. Thanks for the Help Again!!! -Dave
here we go... 1. drain coolant 2.remove heater hoses from engine. remember where they go. 3. blow out one hose to drain coolant from hoses and core. 4. remove the tray under dash.(now is a good time to give it a good cleaning) 5.pop off the retaining clips on the door that is in front of the core. 6.remove the door . maybe not all the way just enough to get your hands in there and with enough room to pull out core. 7.un-do hose clamps and slide 'em out of the way. 8. in my case, i just pulled out the core-hoses and all. 9. put NEW hoses in through the firewall and clamp onto the core. you could use old hoses but since they are cheap, why not replace them?have a helper pull the hoses from engine side of fire wall while you guide the core to its right place. 10.replace cover and retaining clips. 11. dump coolant into one of the hoses to fill up the core so it won't go air-bound. 12. replace hoses to their correct place in the engine. 13. if you haven't changed the thermostat in a while, now is a good time to do it since they are cheap too. 14.refill coolant, run engine, watch coolant level in radiator go down as thermostat opens and get coolant up to level. 15. replace that nice clean tray under the dash. 16.enjoy! as far as the manual goes, post in the "parts wanted" section of the classifieds in this board. good luck!
On my 73 can't pull core and hoses all together, hose won't go through the core housing, had to remove the clamp and remove the hose in order to get the core out. The top hose I could remove without removing the clamp. Everything else was pretty much like Scott listed.
heater core repair The ones without air are easy. my 72 has air and I gotta replace mine this week. fun fun fun....
I just changed mine tonight but I need some help. I got it changed fine. I bypassed the core this summer but I dont remember the order of the hoses on the motor. Can someone tell me where the hose attaches to the motor that leaves the top of the heater core. Thanks
The hose that flows out of the heater core goes to the water pump. The other one (supply pressure side) goes to the engine - usually on the intake cross-over.
by the book, you're suppose to pull the front seat. Remove heater hoses from outside, disconnect AC, remove the entire lower half of the dash, handfull of bolts go through the firewall to the outside, remove the nuts, pull the box. The box has to be split, it has some clamps, just pop them off with a screwdriver, open box, pull heater core, and reverse everything from here to put it back in.
Those are the same instructions (leaving out the AC part) that they give to replace the heater core on a non-AC car. You can get the box split and open without removing it. I can see where it would be more comfortable to remove the seat but we never do.
...just replaced mine last week (A/C car). took heater hoses loose...3 nuts...and A/C lines loose (at compressor)...all under hood. took seat and tray out. remove lower blower duct, one nut inside lower blower opening and removed blower motor by rotating it off the studs... on front of heater box (A/C) unplug vac. lines to box... one bolt above pass. kick panel.. as you remove box be slow so as to be sure everything is loose.. have someone feed A/C lines through the hole. ...this thing is old and brittle...try not to force or pry on the box... good luck... i'm lucky my son ( the Boy ) did 99% of this for me....:Handshake
When I did mine, I didn't want to lose my AC charge, so I split the box. Wound up breaking a part of it. Nothing functionally damaged, but my advice for someone that has never done it before, remove the box properly. Once you've seen it, you know better how to take it apart in the dash the next time. It aint easy, either way. And yea, before I put my car back together, its going to have a nice shiny new heater core in there. Hopefully the last I'll have to put in it.
You know it ain't going to be fun when the directions start with "remove the front seat." But as a rule of thumb, working on anything under the dash always sucks.
