What are the steps to rebuilding / taking apart these heater valves

[maspirito]

Rather then destroying one of these I would like just a step-by-step process on how to rebuild this ?
I suppose the first thing to do is to remove the flapper on the inside from the shaft? But then I was unsure as to how the shaft is removed from the body, does it pressfit in or is it screwed in? I have search the archives and haven't found anything.

[Frank Beck]

Be advised: Some of the shafts in these are pot metal and break by just looking at them. I've seen them split by simply trying to remove the screws. Check with a magnet before you go too far.

[37yrold911]

fill an ultrasonic tank full of Kroil and let it sit in that for a few months...

[mshaver51]

if your goal is to perfectly restore one of these very old ones, it is a difficult job. the clock spring can really be a problem, not to mention the other stuff. the later version is much easier to dis-assemble (but that's not the question you asked).

I have two suggestions before you get too deep. first, bead-blast it to see how deep the rust has gotten. (I've seen really cruddy-looking ones turn out to be relatively good because the crud was mostly grease and dirt, rather than rust.) Once it is blasted clean, use 'Blaster' or penetrating oil to free the spring, shaft and lever. (in my experience, these things were not terribly sturdy and the oil will give you the best chance of not breaking something.)

there's nothing fun here, though. i restored mine. not sure i'd do it again. the later model can be dis-assembled and re-worked in a weekend. originality is wonderful, and i get it, but some stuff is buried pretty deep.

good luck, though.

[maspirito]

Thanks for the opinions, I think I may just pass and put the superseded part on the car which seems to be much more functional anyway.

[Vic Mills]

here is a thread with shows the box broken down http://www.912bbs.org/vb/showthread....ghlight=heater