Author Topic: wiper motor restoration  (Read 2456 times)

z28z11

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Re: wiper motor restoration
« Reply #15 on: October 19, 2021, 03:16:33 AM »
Picking my brain won't take very long, I assure you -

Hopefully I can relate what I've learned after dealing with these motors since buying my Pace Car in '94. Only options at that time were used units, no reproduction of any valve and coils at all. I searched high and low for pieces and parts, even attempted to have the valve reproduced by an injection molder, which proved too costly for me to undertake (mold was $20K +). I still have a GM produced print of the valve, but the current reproductions are really good and not very expensive as things go. Features and material colors are pretty darn close -

I use the original bolts for the motor housing - they were oxide finish, and painted with the housing, not zinc finished that I've ever seen ( I bead blast mine and paint with the motor). Crown of the original bolt is about half the height of the ones in your pic. Coils were batch dated; Heartbeat's dates are good, although the fonts are incorrect (if the pic I've included is clear enough, the October date on my coil is an original GM ink stamp). There is a pick of one of the 2 NOS GM coils I have to show what  the manufacturer stamped on the coil end frame - they were dated as well. I think the repops have caught up with that.

The best way to tell if the gearcase has been rebuilt is to look at the "rivets" holding the case halves together - they have 4 tabs bent back to lock the halves together, very difficult to close them up and separate the case without damaging the tabs. If the field coils and armature of the motor are reused, the only other things to consider are the brushes as a wear part. You gotta consider these are tough little motors, and even in rainy climates were not used every time the car was driven - most used motors still have a good service life left.

As I said before, I think your unit looks good, just a couple of cosmetic changes and I think you'll be all set. Hope I haven't caused you any duress - I apologize if that's the case.

Regards,
Steve
1968 Z28 M21/U17 BRG/W 1967 Chevy ll Nova SS 
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06  1949 3100 5wd 235/6

Red955i

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Re: wiper motor restoration
« Reply #16 on: October 19, 2021, 03:28:21 AM »
Thanks so much.  I learn more every day. I've had my PaceCar since '75 Bought it with 20,000 miles. Drove it in summer until I got married in '85 and put in garage. It just came out of a 36 year nap !! Registration sticker on windshield is 1986. I spoke to Steve. Very honest and knowledgable guy. Has been redoing these for decades. There was obviously no way to replate mine without destroying the coils so it was either original or repro...and I've been avoiding repro.  He told me before doing mine how hard parts were to get and was shocked that mine actually worked when he got it. Thanks again!! Bob

z28z11

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Re: wiper motor restoration
« Reply #17 on: October 19, 2021, 04:11:34 AM »
No problem whatsoever. Smart to buy your Pacer when you did - I looked for a good while to find the one I wanted (I've owned my '69 Z since '73, always wanted a Pace Car to go with it. Looked at what seemed like 100 cars until I found this one, a Southwest Zone car sold through a Houston dealership, Southwest car all it's life until I bought it). Some of the ones I looked at were Flintstonemobiles, with trees growing up through the floorboards. No lie -

Good/bad part about the Z - open headlight car, not an RS. Pros and cons both ways -

Regards,
Steve
1968 Z28 M21/U17 BRG/W 1967 Chevy ll Nova SS 
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06  1949 3100 5wd 235/6

Red955i

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Re: wiper motor restoration
« Reply #18 on: October 19, 2021, 05:42:30 PM »
I paid $2000 for my car. At the time, everyone thought I was nuts :-)

z28z11

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Re: wiper motor restoration
« Reply #19 on: October 19, 2021, 07:21:24 PM »
Good price -  verts held up better than coupes. My high school friend I bought my Z from was getting married, wanted $1800, I ended up buying for $1600. Had to sell my BelAir, but it was worth it.

Steve
1968 Z28 M21/U17 BRG/W 1967 Chevy ll Nova SS 
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06  1949 3100 5wd 235/6