Ok I have the heat going in my 76 280z and there is hot air coming out of the defrost for the winshield but only there. the air coming out of the center of the dash is cold. i have also noticed that when I punch the gas up to about 6 grand the windows fog up and I can smell antifreeze like really really bad! I have had the car for a week and im just know starting to fix the little problems and this is one that NEEDS to be fixed so I can drive it. Sooo what do i need to do???

Sounds to me that there is a leak in the temp mix valve, between the heater blower and the firewall, on the passenger side of the climate control in the console. Just follow the hose(s) from the passenger side of the block, through the firewall.

You may also have misplaced air tubes (thick construction-like paper conduit for directing the blown air) to the registers.

Is the passenger side floor wet?

I'm not familiar with the 76 HCP, but in the Series I and II (pre-260) there was no way of getting heated air out of the center or the eyeball vents unless it was very VERY hot outside or the car had been in the sun all day.

Both the Center and Eyeball vents were for fresh air only.

Heated air from the Heater Core was only available through the Defrost Vents or to the "Room" flaps on the side of the plenum.

It may be that the later style 76 or even 260 + changed that, but someone needs to verify that.

2¢

E

Yes the floor is damp....

Yes the floor is damp....

Possible leaking heater core, leaking heater valve, or one or both of the hoses that connect to the heater valve.

EScanlon is correct on how the air flow is. It is still the same for the 280Z's

77 280Z

http://s38.photobucket.com/albums/e106/babry27/77%20Datsun%20Restoration/?start=all

Ok I have takin every thing off so i can get to the heater. When I sart the heater I have water coming out of the ducts for the defrost at the heater. I know nothing about this cars or there heaters so pics would help me greatly in discriptioins.

Its rusty water... man i got the dash all apart and still can figure this out!!!:mad:

I saw the photos in your gallery. Fun job, isn't it? So the core is the source of the leak. Are you going to take it to a radiator shop? I ask because when I did mine, I tried that but it fell a part when he tried to disassemble it and I ended up having to buy a new one. Hopefully, your luck will be better.

Ya the job sucked! Taking out that heater core was a pain. my car is all original and has 92000 miles on it and really never been touched so the antifreeze was old and it stunk so bad! Yuck! Ya im not even going to bother taking it somewhere just going to buy a new one. Thanks for all the help guys!!! Im glad I joined this online car club its sweets that I cant post my problems like this and get help! Thanks agin!:classic:

Not to add to the pain but it might be wise to replace the water valve while you have everything apart as well.

77 280Z

http://s38.photobucket.com/albums/e106/babry27/77%20Datsun%20Restoration/?start=all