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Hot!Blower Motor Screaching

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scam75
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2020/11/18 15:41:34 (permalink)

Blower Motor Screaching

Hi chaps
 
Apologies for not being on for a while, life has got in the way!! Anyway my blower motor has started complaining via "please lubricate me" noises. Annoying as even with blower on zero as you know it still turns over a bit. I've sprayed some WD40 into both ends, removed the resistor for a bit of access but nothing can be getting near the bearing. Has anybody managed to solve this issue or am I looking at replacing the unit? I'm sure I read they are a nightmare to remove sadly.
 
All help appreciated.
 
Cheers
 
Stuart

'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK
Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.

12 Replies

944Turbo
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Re: Blower Motor Screaching 2020/11/18 16:31:11 (permalink)
wd40 is not a great lubricant but it should silence it briefly if it hits the right spot. They are not that bad to remove, though removing the fragile and expensive scuttle cover is probably required - might be possible to fold it back. The blower unit is 'stuck' down though there is some kind of non setting flexible sealant around the bottom edge, I cant remember exactly whats involved (6 or 8 fixings on top?) and a couple of connectors, but once the fixings are removed I removed the grills from either end and lifted it with the aid of some 3x2 or similar to provide leverage and break the seal - very satisfying to get all the leaves and detritus that settles underneath it though. I think I used a type of flexible mastic to reseal mine, but the original was similar to the back lights. I removed mine to remove the wiper mechanism when fixing the wiper linkage.
Tony

944T Coupe - personalised ;) but needing work
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scam75
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Re: Blower Motor Screaching 2020/11/18 16:46:14 (permalink)
Thanks Tony. Yeah agree on the WD40, was only thing in car when I stopped. Got it home now. I wonder if I can remove the top cover and have a go at lubricating it then with better access, before resorting to replacing the motor?
 
Stuart

'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK
Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.
Waylander
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Re: Blower Motor Screaching 2020/11/18 16:47:01 (permalink)
Hi Stuart
 
the blower cover is held on with 8-10 self tappers that are possibly now very fragile, there is no need to remove the bottom half to get the motor out, think the bearings are sealed deep groove ball type, should be replaceable,
 
and as 944 Turbo says there will be a huge amount of crap up there, i would check your wiper arms while you have it off, makes it about 100 times easier to replace them
 
its a motor with fan blades on both ends that completely cover the bearings so you have no chance with a spray can
post edited by Waylander - 2020/11/18 16:48:08

1992 Cobalt Blue 968 Coupe
1986 VF1000F2 Silver
scam75
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Re: Blower Motor Screaching 2020/11/18 16:50:34 (permalink)
Thanks Martin. I resorted to drilling a hole through the joint, at driver wiper, to cure my issues with wiper arms, been good for may years now, but yeah access is tricky!
 
So if the bearings are sealed, I'm wasting my time trying to spray in some lubricant?
 
Cheers
 
Stuart

'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK
Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.
scam75
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Re: Blower Motor Screaching 2020/11/19 18:55:49 (permalink)
Quite a ridiculous price new for a motor, £400 was cheapest. Took a punt on one from the bay of fleas @ £35 delivered which apparently works fine. Can then look into putting new bearings in my own at my leisure so I have a good spare if required.
 
Cheers
 
Stuart

'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK
Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.
Waylander
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Re: Blower Motor Screaching 2020/11/19 19:53:18 (permalink)
When it’s £231 for a plastic trim £400 for a motor is not bad.........
 
and I would service the second hand motor before fitting it, 
 
then service your original to keep for a spare
 
 
post edited by Waylander - 2020/11/19 20:00:28

1992 Cobalt Blue 968 Coupe
1986 VF1000F2 Silver
TTM
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Re: Blower Motor Screaching 2020/11/20 17:03:11 (permalink)
From what I can remember there is nothing special at all about the bearings. They are made of bronze and mine have been quiet ever since I cleaned and regreased them about 10 years ago.
scam75
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Re: Blower Motor Screaching 2020/11/23 13:23:25 (permalink)
Good to know TTM. I will have a go with my original motor. Thanks Martin also.
 
Cheers
 
Stuart

'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK
Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.
scam75
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Re: Blower Motor Screaching 2020/11/26 15:11:23 (permalink)
Well in case anyone was following and missed the update on this, as it was in water hose thread, I'll put it here.
 
On removing the blower cover it span smooth, quiet and freely. However one of the flaps which blocks outside are for recirc, had detached. It is possible it may have been fouling a fan blade hence the screech, I can't be sure. I managed to re-attach the flap and put it all back together and it's silent. I'm not convinced of anything to be honest, all a bit odd, but for now it works. My replacement motor has arrived anyway and will put it into action if need be. Another part of the car I now understand.....a bit! :)
 
Stuart

'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK
Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.
Eldavo
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Re: Blower Motor Screaching 2020/11/26 23:13:45 (permalink)
All this trouble caused by loose flaps and open orifices. Explains why some people call their car “She”. 

Current:
1988 944 Turbo S (not exactly standard)
Past:
2002 996 3.6 C2
2006 987 Boxster 2.7
1988 944 2.7
Caucus Marine Ti Racing-Developments
scam75
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Re: Blower Motor Screaching 2020/11/26 23:16:00 (permalink)
Indeed Dave  . I want no more flap and orifice issues!
 
Stuart 

'90 944 Turbo - Sunroof delete, Factory bridge spoiler, CS wheels, CS steering wheel, 1st MY90 turbo in UK
Promax L2 chips, SciVision MAF, Lindsey DPW, MBC, Forge recirc valve, 3 bar FPR, K&N panel, GAZ Gold, wideband AFR, Sytec Motorsport Fuel Pump.
944Turbo
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Re: Blower Motor Screaching 2020/11/27 11:31:06 (permalink)
result on the blower at least!

944T Coupe - personalised ;) but needing work
944T Cab - Standard
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