home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > maintenance & nonperformance

Reply
 
Thread Tools Display Modes
Old 12-02-2018, 11:49 PM   #1
ktm450
Board Member
 
Join Date: Apr 2009
Location: Cincinnati, ohio
Default 240 wiper motor struggling

I have put 3 used wiper motors on my 1991 240 over the years, and all have eventually gotten slower to the point of being too slow for a heavy rain. I also have another 240 and the wipers work way better on that car, almost as fast as on my 1993 940 T. I am beginning to wonder if it could be wiper linkage? I have not tried to lube the linkage up. The motor sounds like it is struggling, laboring, and moaning. This last motor I put on worked great for a couple months and then got slower, and louder. Any suggestions would be appreciated. Thanks.

KTM450
__________________
1993 940 8 valve turbo 70000 miles
1991, NA 244DL 111000.
ktm450 is offline   Reply With Quote
Old 12-03-2018, 12:46 AM   #2
PromiseRing
We don't even like Volvos
 
PromiseRing's Avatar
 
Join Date: Feb 2014
Location: Missouri
Default

You can add an additional ground to the wiper motor and it may help a lot. I know earlier cars did not get a dedicated ground but later ones did (not sure what year that started). You could also possibly lube the internals of the motor carefully with the appropriate lube.

http://forums.turbobricks.com/showthread.php?t=309689
__________________
Feedback Thread
Current:
93' 244 m47
93' 245 m47
90' 744 AW70
94' M-Edition Miata
95' Camry auto
Past:
80' 242gt m46
88' 245 m47
92' 940 turbo AW17

Knipex pronunciation: /kəˈnɪpɛks/
The K is pronounced like normal. The upside down e (referred to as a Schwa) is pronounced like "uh".
http://www.personal.psu.edu/ejp10/bl...de_down_e.html
PromiseRing is offline   Reply With Quote
Old 12-03-2018, 06:51 AM   #3
Janspeed
Board Member
 
Join Date: Sep 2005
Default

lubing up all linkages will help. The geardrive inside the wiper motor housing also needs to be lubed, it's probably a worm drive. In old wiper motors the grease has often dried out resulting in gunk that does no lubrication at all.
Janspeed is offline   Reply With Quote
Old 12-03-2018, 08:14 AM   #4
2turbotoys
Salaminizer
 
2turbotoys's Avatar
 
Join Date: Nov 2007
Location: Reading pa
Default

Adding a ground to the top motor mounting screw fixed my slow wipers.
__________________
1979 242 B21 on MS, waiting on L33
1991 740t RIP at 320K, dam rust...
2006 V50 T5 AWD Eurosport Tuning Stage 1 kit, downpipe, intercooler
2turbotoys is offline   Reply With Quote
Old 12-03-2018, 10:45 AM   #5
JW240
All idiot, no savant
 
JW240's Avatar
 
Join Date: Aug 2004
Location: The Netherlands, Europe
Default

No loose magnets in the motors? Many of the newer 240 wiper motors have that.
Extra ground won't hurt, same with some grease. With the motor decoupled from the linkage, how hard is is to move the wipers?
__________________
240 | 1991 | 332 KKm | B230F+T | Cosworth T3 60/63 | M90 | TrueTrack
Husaberg FE450 '12 supermoto swapped


Quote:
Originally Posted by Redwood Chair View Post
Don't forget about properly seasoning it on HF jackstands for a couple years whilst dreaming about big powah 'goals'.
JW240 is offline   Reply With Quote
Old 12-03-2018, 11:20 AM   #6
283SD
Board Member
 
Join Date: Mar 2008
Default

Magnets come loose causing the motor to bind, I have re glued them with JB weld with good results.
283SD is offline   Reply With Quote
Old 12-03-2018, 12:12 PM   #7
Mr. V
Board Member
 
Mr. V's Avatar
 
Join Date: Jul 2004
Location: Portland, Oregon metro
Default

How good are the aftermarket wiper motors we see advertised by the various online retailers?
Mr. V is offline   Reply With Quote
Old 12-03-2018, 12:24 PM   #8
intothelabyrinth
Board Member
 
intothelabyrinth's Avatar
 
Join Date: Mar 2012
Location: Bowling Green, KY
Default

Take it apart, my money is on one of the magnets has come unglued. Epoxy it back and go on with life!
__________________
1986 245 Auto (RIP)
1986 245 Auto (RIP)
1988 245, M47 (My Daily)
1989 245 Auto California Car
1999 V70 T5 Auto (Girlfriend's Daily)

brokedownbrick.wordpress.com
intothelabyrinth is offline   Reply With Quote
Old 12-03-2018, 10:04 PM   #9
quillc
yv1a.com
 
quillc's Avatar
 
Join Date: Aug 2008
Location: Kitsap, Wa
Default

1. Your wiper linkage is likely binding causing the motor to overload. Heat kills motors.
2. Loose magnet.
3. Worn carbon brushes.
__________________
Chris
www.yv1a.com
quillc is offline   Reply With Quote
Old 12-03-2018, 10:06 PM   #10
2turbotoys
Salaminizer
 
2turbotoys's Avatar
 
Join Date: Nov 2007
Location: Reading pa
Default

The ground wire is by far the easiest thing to try first. Mine went from undrivable in the rain to working normally. I also bought a new wiper motor to fix it but the ground helped so much I haven't bothered installing it yet.
2turbotoys is offline   Reply With Quote
Old 12-03-2018, 10:56 PM   #11
ktm450
Board Member
 
Join Date: Apr 2009
Location: Cincinnati, ohio
Default

Ok thanks guys! I'll check the ground first and then the magnets and brushes. The car is a 1991 240 sedan that has the slow wipers. My 1992 is the one that works great. I wonder if 1992 is the year they grounded it better? Also, I did pull the cover and put fresh grease on the plastic gears.

Also, I have a slight clunk on the drivers side under the dash when the wipers are running. And, I haven't tried to move the wipers with the linkage disconnected, the weather here is crap and I don't have a garage. I will also get up under the dash, and spray the linkage with motorkote spray. Thanks again!
ktm450 is offline   Reply With Quote
Old 12-03-2018, 11:08 PM   #12
PromiseRing
We don't even like Volvos
 
PromiseRing's Avatar
 
Join Date: Feb 2014
Location: Missouri
Default

240 wiper cables scare me. When mine breaks I’m just scrapping the car and buying another Toyota.
PromiseRing is offline   Reply With Quote
Old 12-04-2018, 06:27 AM   #13
cleanflametrap
Board Member
 
cleanflametrap's Avatar
 
Join Date: Sep 2009
Location: near baltimore
Default Diagnosis

Quote:
Originally Posted by ktm450 View Post
I have put 3 used wiper motors on my 1991 240 over the years, and all have eventually gotten slower to the point of being too slow for a heavy rain....
Having done this job three times before, you know what quick, dry, and easy work it is to disconnect the motor's crank behind the glove box. Fact is, you don't even need to pull the glove box to reach it with one shorty 10mm wrench. If you're still at all limber, you can do it with the doors closed from inside, even.

So like JW240 already posted, just disconnect and see where the trouble is. Sure, we all have had loose magnets and corroded grounds, but if you've changed the motor 3 times, I'm betting on that left side drive having lost its lube. Not the cables, but the spindle. That's the job you want dry weather for.

http://cleanflametrap.com/wiper.html
__________________
-Art
cleanflametrap is offline   Reply With Quote
Old 12-04-2018, 09:05 AM   #14
zapata
Board Member
 
Join Date: Jun 2011
Location: Delft, NL
Default

Quote:
Originally Posted by Mr. V View Post
How good are the aftermarket wiper motors we see advertised by the various online retailers?
I would recommend a good used one over an aftermarket motor. I bought an aftermarket one from either FCP/IPD (I can't remember which) and the intermittent feature would only work sporadically. When it did work, the delay between activating was way too long.

I'm still annoyed that when I was trying to fix the original one (separated magnet) that I dropped the magnet.
zapata is offline   Reply With Quote
Old 12-04-2018, 10:43 AM   #15
KeizerBrickGuy
Sh*t pot stirrer
 
KeizerBrickGuy's Avatar
 
Join Date: Jun 2016
Location: Keizer, OR
Default

Quote:
Originally Posted by PromiseRing View Post
240 wiper cables scare me. When mine breaks Iím just scrapping the car and buying another Toyota.


Everyone has hit the mark.
1. Add second ground
2. Pull and disassemble, inspect/repair/lubricate, reassemble and reinstall
3. While the motor is out, inspect the linkage. If it moves freely, it's most likely the motor. If not it is probably both. Might as well pull the assembly apart and relube.
__________________
-Stephen
Quote:
Originally Posted by 87_240TURBO View Post
#mclovethesenuts

-My car: White 1991 244, 308k miles. B230F LH2.4, AW70, R134a retro. Thrush glasspack, anthracite refinished Coronas
-Wife's car: White 1990 244DL, T cam, 190k miles.B230F LH2.4, AW70 w/aux cooler, Duracool AC w/condenser fan, purple refinished Virgos, tow hitch, ipd wagon overload springs.
-PSM 2002 Subaru WRX wagon: 120k miles, Perrin TBE, Perrin turbo inlet, intake, and Y-pipe, GrimmSpeed cross pipe.
Rebuilding EJ207 shortblock to swap in this summer.
KeizerBrickGuy is offline   Reply With Quote
Old 12-04-2018, 01:08 PM   #16
Mr. V
Board Member
 
Mr. V's Avatar
 
Join Date: Jul 2004
Location: Portland, Oregon metro
Default

Quote:
Originally Posted by PromiseRing View Post
240 wiper cables scare me. When mine breaks Iím just scrapping the car and buying another Toyota.
Nah, that is unnecessary.

Mine broke on my 244 Turbo, and the fix was not as bad as I thought it would be.

I removed the dashboard to get access to the wiper mechanism, and with the dash removed everything was accessible.

How to: http://cleanflametrap.com/dash.html
Mr. V is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 07:10 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.