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Author Topic: Wiper Motor Repair  (Read 1644 times)
69Z28-RS
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« on: January 12, 2013, 01:30:38 AM »

I removed my wiper motor for maintenance and cleaning..  and I've got some questions that hopefully someone can help me with:
1) Is the motor repairable?   Are replacement bearings for the rotor available?  Does anyone provide that service?
2) My car is an RS, so the wiper motor has the vacuum pump works as well.  IS the wiper motor portion the same from an RS to a NON RS car?  ie. Can I use parts from a non RS car to repair my RS wiper motor?   

Gary
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
z28z11
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« Reply #1 on: January 12, 2013, 05:42:40 PM »

Gary,

Good coverage in the 1969 Chassis Service Manual starting in section 12-35 for the procedures if you want to tackle this yourself. I would not recommend disassembly of the gearcase unless you want to bolt it back together - the factory procedure is to drill out the staking tabs and bolt it back together using "screws, nuts and washers.....contained in a service repair package". If the gears are O.K., I recommend replacing the brushes, cleaning the armature, outer cases, replacing the mount cushions: paint and detail and you should have a pretty good looking and functional part. I have only seen one business advertised in Hemmings in a good while for restoring electrical wiper motors - might be more options on the net, but I have no reference for you. Parts might be tough - if you have a friendly dealership, if they don't list them as current have them look them up on the locator - you might get lucky. You can also try a local AC/Delco service parts company if there are any left around - I haven't had the occasion to buy from one in a couple of years.
Please see the following - these are the only details I have ever seen different between the original part # 5045605 RS wiper motors assemblies, and replacement motors like the # 4918442. The end frame (rear bearing support) cover is stamped with the part number, there usually is a sliver tag with part number and date code as you see in the pic (now available as a repop, correct), and the 2 drilled holes for the directional valve (solenoid coil operated) mounted directly on top of the motor housing, as you know. The valve and valve parts are produced by Impala Bob's that I have seen - he apparently is the primary supplier to a lot of the catalog houses, but will sell components if you can make repairs to your original. The valves are pretty fragile, and break easily when old.I can supply you with part numbers if you don't have access to a GM parts manual - tell me what you need.

Regards,
Steve
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1968 Z28 BRG/W
1969 Z28 X77 LeMans/W
1969 X66 L78 Cortez/BVT
1969 Z11 L48
69Z28-RS
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« Reply #2 on: January 12, 2013, 08:30:39 PM »

Steve,
I appreciate your comments; mine is mostly just has dried up lubricant I believe, as it hasn't been operated in over 35 yrs.   I'm having difficulty removing the motor housing (top is off, but the housing is resisting;  I suspect the brushes are holding it.. so I just need something small to hold the brushes back so the housing comes off.
Gary
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
rsr
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« Reply #3 on: January 20, 2013, 12:21:28 PM »

Any good shops that rebuild your original wiper motor? I 've had some rebuilt at my local rebuilders but it might not ever stop running even with the switch unplugged..The local shop now refuses to do anymore because of this problem.I can get a rebuilt motor through Auto Zone or Advance but it might have different hardware and bright zinc plating!
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hotrod68
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« Reply #4 on: January 20, 2013, 11:56:25 PM »

If you're not set on concours originality, NAPA sells a rebuilt motor at a fairly resaonable price, but their stock is getting low! These motors are original in appearance and have a warranty, but do not come with the washer pump or mounting bushings. Hope this helps.
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HotRod'68  1968 SS350 coupe undergoing frame-off resto/rod. 386/350/4.11s
Butternut Yellow    black standard interior
rsr
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« Reply #5 on: January 24, 2013, 10:02:31 PM »

Pretty much same motor sold @ Auotzone-Advance Auto for a reasonable price and yes getting harder for them to stock.That's the reason for looking to find a concours rebuilders who knows what the originals should be. Thanks but it's got'a be original looking............
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KevinW
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« Reply #6 on: January 25, 2013, 07:07:17 AM »

FYI, I currently have Gary's wiper motor in for repair Smiley
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rsr
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« Reply #7 on: January 26, 2013, 10:28:52 AM »

Kevin are you taking on any more to repair?
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