Heater

The heater valve behind the heater under the dash was stuck closed. I was advised not to force it until I have a Plan B in place. The 35-year old valve will likely break if I force it...which would be a big mess inside the car. I ordered a valve from a 620 and replaced the innards and refurbished the heater.

Carpet, padding and heater cover removed	wiring spaghetti	Parts...and more parts
More wiring stuff	Outlet from heater through firewall	The culprit...a seized heater valve
Heater core and fan assembly front	Heater core and fan assembly back	Another view of the valve
and another	Old leaves on the heater core	Looks like it's been undisturbed for quite a while
nasty looking valve	A new shiny valve that I tore apart for parts. Nissan Part Number 27017-B5000. It's from a 620 pickup 70's era I think.	Be careful bending the brass flanges...
You bend the brass flanges up and you can pull the innards out	what the overnight vinegar bath did for the old valve assembly...clean huh?	and another view
Holding my breath bending the brass flanges on the old valve	Whew! They didn't break!	Old valve guts
and a bit of stop leak perhaps...it came out with the old valve	Pretty dusty squirrel fan and crumbly foam	gently pull on the heater core
and a little more	and it's out!	lots of debris and surface rust
cleaning the squirrel fan...	it's actually clear plastic, not black!	heater core/ fan cover...more crumbly foam
scrubbed and sanded	waiting for the paint to dry	taped off the motor and thermostat spring for painting
WHOOPS! What tha?	hmm, these heater cores are different!	this one has a long output on the other side of the core
New one on the left, old one on the right	valve with new guts installed and brass flanges bent back into place	Shiny huh?
Back of the case with the new core installed...after punching another hole in the back of the case for the new and different heater core	nice new white foam weatherstripping	a retrofit of more foam
ready to install the valve	The new valve installed	Under the dash the connections were disconnected and the cables were bent. I fixed 'em all up while I was there.
A dusty, dirty mess inside...	The foam just disentegrated when I touched it.	a little surface rust
washed and old foam removed	more rust and dirt inside	A soapy bath for everything
top one is washed and treated with Pledge - bottom one is just washed	everything's all clean	It's hard to see but I've fitted up black foam into the door and I'm ready to glue it in place.
foam glued in place	heater installed...only one little leak and it stopped when I re-tightened the hose clamp