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-   -   Cooling fan motor repair (https://www.the75andztclub.co.uk/forum/showthread.php?t=315231)

vitesse 16th September 2021 21:51

Quote:

Originally Posted by stocktake (Post 2899851)
The first time it is without doubt daunting, there are a few of us on here that have done quite a few now and you still worry if the two torx on the front panel will come off ( there is a work around if they don't) and then if the three motor body torx will come out and then what is the state of the board in the motor and the rest and finally and hopefully the magnets aren't cracked.
Still when you plug it in (laid on the floor before you put it all back together I may add ;) ) it's a great feeling when it spins into action.

OK Old wise one, what's this work around for the two torx on the front panel? Those have slowed me down more than anything else, brand-new bits = no chance, angle grinder to cut a proper slot = sometimes, welding a metal bar = usually, grinding and drilling them out = always.

Please share part of the secret of your record breaking time ...

Mike

Arctic 17th September 2021 00:32

[QUOTE]
Quote:

Originally Posted by stocktake (Post 2899851)
The first time it is without doubt daunting, there are a few of us on here that have done quite a few now and you still worry if the two torx on the front panel will come off ( there is a work around if they don't) and then if the three motor body torx will come out and then what is the state of the board in the motor and the rest and finally and hopefully the magnets aren't cracked.
Still when you plug it in (laid on the floor before you put it all back together I may add ;) ) it's a great feeling when it spins into action.[/QUOTE

]

Hi Mike.
Dave will know for sure as we did a fan together a few meets ago now, time was i think from removing the bumper, slam panel, fan, refitting another and put it all back together around 2 hrs so removing the fan is easy to do in an hour. ;)


https://i.imgur.com/y3DBlSml.jpg1

https://i.imgur.com/4UJpEFEl.jpg2

Bumper removed as above now the slam panel with lights attached, take note of those two torx that are a nightmare.
https://i.imgur.com/OL2e1qml.jpg3

I doubt these would ever more unless you drilled then out.
https://i.imgur.com/Db0Na92l.jpg4

https://i.imgur.com/1sXq39yl.jpg5

Slam panel off take note where the two torx where holding the slam panel to the rubber grommets.
https://i.imgur.com/Gxt5J5Ml.jpg6

Nibble around the A/C joints.
https://i.imgur.com/yxHCGTDl.jpg7

https://i.imgur.com/kOLXaNEl.jpg8

lifting the cowling from the radiator.
https://i.imgur.com/mjBnXFHl.jpg9

https://i.imgur.com/hAV2rn5l.jpg10

Fan is off the car, ready to be changed or to remove the lid off the motor and replace the brushes.
https://i.imgur.com/dKiKOlQl.jpg11

New fan fitted after messing around with the old fan for 20 minutes or more.
https://i.imgur.com/vYqrengl.jpg12

There was a lot of spurious wiring on the slam panel & on this car, before it could be put back together.
https://i.imgur.com/RSXXstCl.jpg13

https://i.imgur.com/gXfUktLl.jpg14

The lights had been tampered with.
https://i.imgur.com/cD8hWqal.jpg15

https://i.imgur.com/EbW5Vj0l.jpg16

So this took longer than usual :}
https://i.imgur.com/nu5qQaHl.jpg17

If the wiring had needed to be sorted out then front would have been back on by 11.10am at the latest.

This is what the fan motor looked like, you can already tell its been burnt out.
https://i.imgur.com/QOnjI5Ql.jpg18

https://i.imgur.com/nN9CChrl.jpg19

https://i.imgur.com/wEf7XOHl.jpg20

The motor is burned
https://i.imgur.com/3QRumRvl.jpg21

Wiring burnt through.
https://i.imgur.com/SlCTKb8l.jpg22

Coils burned.
https://i.imgur.com/jJqJRi6l.jpg23

This was only good for spare such as the wring loom, control box and PCB.
https://i.imgur.com/3TlyggQl.jpg24

https://i.imgur.com/XWC3kXDl.jpg25

I find it always best to remove the fan altogether it saves time in the long run. ;)

vitesse 17th September 2021 07:52

Thanks Steve, yes I remember Dave mentioning your record time. Best I've achieved is 3.5 hrs with an assistant. Hopefully the OP will say that it took him 2 hrs plus just to get the fan out:}

Doing another one on Tuesday, and have advised the owner that it can take about 5 hrs - always like to prepare owners with some margin and then sometimes the headlights need a polish too.

Dave mentioned he had some sort of work around for those pesky torx, will be interesting to hear his words of wisdom.

Keep well

Arctic 17th September 2021 08:57

Quote:

Originally Posted by vitesse (Post 2899914)
Thanks Steve, yes I remember Dave mentioning your record time. Best I've achieved is 3.5 hrs with an assistant. Hopefully the OP will say that it took him 2 hrs plus just to get the fan out:}

Doing another one on Tuesday, and have advised the owner that it can take about 5 hrs - always like to prepare owners with some margin and then sometimes the headlights need a polish too.

Quote:

Dave mentioned he had some sort of work around for those pesky torx, will be interesting to hear his words of wisdom.

Keep well

Hi Mike.
I have it up on the work around in the post above with the photo, you leave the torx in place and pull the slam panel off the rubber connections, leaving the plastic sections attached to the slam panel.

Then the trick is to trim down the rubber connections, add some rubber grease or vaseline to them then when you come to re-fit the slam panel it will push back on nicely ;)

vitesse 17th September 2021 09:45

Quote:

Originally Posted by Arctic (Post 2899929)
Hi Mike.
I have it up on the work around in the post above with the photo, you leave the torx in place and pull the slam panel off the rubber connections, leaving the plastic sections attached to the slam panel.

Then the trick is to trim down the rubber connections, add some rubber grease or vaseline to them then when you come to re-fit the slam panel it will push back on nicely ;)

With you now:}. I might well try it that way if the torx give me grief on Tuesday.

Thanks

chicochapman 17th September 2021 10:29

ps Forgot to ask how long it took, please don't say an hour as suggested by Arctic, as I never manage anywhere near his time.[/QUOTE]


Probably spent 6 or 7 hours on the job so far including sourcing a 15mm thin-walled socket.
Just on the soldering now!
Malc

vitesse 17th September 2021 11:29

Quote:

Originally Posted by chicochapman (Post 2899941)
ps Forgot to ask how long it took, please don't say an hour as suggested by Arctic, as I never manage anywhere near his time.


Probably spent 6 or 7 hours on the job so far including sourcing a 15mm thin-walled socket.
Just on the soldering now!
Malc[/QUOTE]

Nice to hear that I'm not the only one who can't match Arctic's work:}

genpk 17th September 2021 18:29

ive done about 3 of these fans but two of the 3 had badly worn copper commutators.
At one point i did a bit of research into alternative fan motor as the cost of the original Seimens ones were crazy expensive.
Did find that a chevy model used the exact same fan motor with the same fan attachment on the shaft but half the price.

vitesse 17th September 2021 18:44

Quote:

Originally Posted by genpk (Post 2900012)
ive done about 3 of these fans but two of the 3 had badly worn copper commutators.
At one point i did a bit of research into alternative fan motor as the cost of the original Seimens ones were crazy expensive.
Did find that a chevy model used the exact same fan motor with the same fan attachment on the shaft but half the price.

Think I remember you mentioning it quite a few years back and then I had a look at JC Whitney's website but although some looked similar I was never really sure so if you can tell us which year/model of Chevy that would help.

Surprisingly, USA parts are easier to source in Sweden than Rover ones.

Keep well

ps. I've got a Chevy S10 outside, must remember to check:}

chicochapman 17th September 2021 19:08

Just in case I have to come this way at some time in the future, I've bought a slack handful of HEX HEAD set screws for the re-assembly.


And here's today's tip - one of the torx heads I had to grind off was one connecting the slam panel to the wing. So thinking this was fairly important
I didn't want to try drilling it out and ruining the thread but there was just enough thread sticking out underneath to get locknuts on, so I was able to turn it out that way.:}


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