Screeching heater fan!
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Screeching heater fan!
I think the remaining life of my heater fan can be counted in minutes - it is emitting a very loud screeching noise, as if it is about to seize up and blow a fuse.
Has anybody ever changed one of these? Did Lotus build the car around it? ie. Is it a full dash out job? Is this how she thanks me for filling her up with around 6 litres of Mobil 1???
My car is a 1990 car with AC.
Has anybody ever changed one of these? Did Lotus build the car around it? ie. Is it a full dash out job? Is this how she thanks me for filling her up with around 6 litres of Mobil 1???
My car is a 1990 car with AC.
The fan motor is held in with 3 m6 nuts up in the passenger footwell behind the dash ,you can remove it with the dash in place but you will need a socket and an extension bar and then remove the fan motor and impelor.
The one in my car also screached and the brass bushing had siezed onto the motor shaft and was turning in the mounting so after a lot of wd40 and a coating of light grease on the motor shaft the problem was solved and it has been okay for the last two years .
total time allow 1-2 hours and a few lost knuckles
hope this helps K
The one in my car also screached and the brass bushing had siezed onto the motor shaft and was turning in the mounting so after a lot of wd40 and a coating of light grease on the motor shaft the problem was solved and it has been okay for the last two years .
total time allow 1-2 hours and a few lost knuckles
hope this helps K
- robertverhey
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Thanks for the hints .. I've had a quick look and it seems that the unit in my car (1990 SE with AC) is identical to a Mk 3 Supra (86-92) ...
New replacements are only around $60 in the US and I'm visiting in january so may pick one up on holiday! Failing that, a Mk3 Supra must be pretty easy to find in a scrapyard.
The siezed bush sounds very much like my problem!
New replacements are only around $60 in the US and I'm visiting in january so may pick one up on holiday! Failing that, a Mk3 Supra must be pretty easy to find in a scrapyard.
The siezed bush sounds very much like my problem!
Yep, just fixed it, the lower bush was seized to the motor shaft ... I freed it up, cleaned everything and oiled the bush and absorbant pad with Mobil 1. It runs nice and smoothly now, except that the lowest fan speed still doesn't work ... I imagine the resistor block has a problem - a common problem with the donor Supras!bear wrote: The one in my car also screached and the brass bushing had siezed onto the motor shaft and was turning in the mounting so after a lot of wd40 and a coating of light grease on the motor shaft the problem was solved and it has been okay for the last two years .
total time allow 1-2 hours and a few lost knuckles
hope this helps K
I need to evolve another joint between wrist and elbow!
- robertverhey
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Another possibility is that the switch contacts get dirty. When I tried the fan settings in my car for the first time in over a year, a couple of the speeds did not work. My heart sank as I thought I would have to dismantle half the dashboard to find the problem. More out of desperation than anything else, I started to move the slider through the various positions. I was very surprised and pleased when after a few cycles, all the speeds started to work as normal.
I also found once that a dodgy earth connection on the offside engine mount caused one of the speed settings not to work. Except I didn't realise I had a dodgy earth for several months until it deteriorated to the point when I had engine starting problems. Fixing the starting also fixed the heater fan speeds, much to my surprise.
PS Steve , do you have details of the dim-dip bypass mod?
Thanks
I also found once that a dodgy earth connection on the offside engine mount caused one of the speed settings not to work. Except I didn't realise I had a dodgy earth for several months until it deteriorated to the point when I had engine starting problems. Fixing the starting also fixed the heater fan speeds, much to my surprise.
PS Steve , do you have details of the dim-dip bypass mod?
Thanks
Paul
'88 MY Excel SE #2551, 1996 TVR Griffith 500, 2006 Ford Fusion 1.6 diesel
'88 MY Excel SE #2551, 1996 TVR Griffith 500, 2006 Ford Fusion 1.6 diesel
- robertverhey
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The Haynes Supra Manual shows this (but on a RHD Supra) on pages 3-8 and 3-9 and yes the resistor is indeed located in the ducting between blower unit and heater core. The part is actually shown in the manual and the numbers on it are 87138-24010.
Excellent, can finally get the heater fan speeds sorted......
Excellent, can finally get the heater fan speeds sorted......
Robert Glacier Blue '87 SE
- robertverhey
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- Ozzy_UK
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out of curiosity is there a haynes manual for the Excel?
if not where do you guys get your technical manuals from?
and where can i get a copy... being a new owner, have always have haynes manuals for every other car i have owned...
Cheers!
Oz.
if not where do you guys get your technical manuals from?
and where can i get a copy... being a new owner, have always have haynes manuals for every other car i have owned...
Cheers!
Oz.
Oran Maliphant
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Mercedes B250e “Tesla” 2015
MGF 1.8i Steptronic CVT 2001
Honda Civic Type R EP3 2004
Volvo V70 T5 2002
Lotus Excel 4.0l V8 1987 #2470
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Mercedes B250e “Tesla” 2015
MGF 1.8i Steptronic CVT 2001
Honda Civic Type R EP3 2004
Volvo V70 T5 2002
Lotus Excel 4.0l V8 1987 #2470