I'm currently refurbishing the heater box. Noticed one of the brush holders is melted. It looks like the PO never used the heater (we rarely use heater in Australia) or the box came from junk yard. The motor was completely seized.
I've managed to clean the whole motor with special spray used in cleaning computer motherboard. I fabricated a brush holder out of heat resistant plastic and soldered the carbon back to the disconnected wire. After cleaning I was able to turn the shaft with no problem. Hooked it all up and it worked in low rpm then slowly picked up to maximum rpm (I guess it found the right spot with brushes). I've been testing it since and it works with no problem. But, something at the back of my head says, "Ok, you won, it works fine, now go buy a new fu*kn motor!". I'm worried if this thing stop working in 6 months and then I have to go through the whole hassle of pulling the heater box out.
I found a genuine Bosh 0130007081 (used in Porsch) for $75 shipped. My questions:
Is that a fair price?
Has anyone used this motor? I have the rubber sleeve so I can use it if needed.
Is the shaft diameter same? So I can use my old fan?
How do you remove the urethane bushing so that you can get the fan out? (trying not to force it, in case I damage the fan)
I appreciate any input. Cheers