fitting otter switch to alloy rad

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jibowski
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fitting otter switch to alloy rad

Post by jibowski » Mon Jun 19, 2017 3:51 pm

Hello

How would you guys go about fitting an otter switch to an alloy GW radiator?, the hole on the side isn't threaded to take a screw in item
Last edited by jibowski on Mon Jul 23, 2018 12:29 pm, edited 1 time in total.



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Re: fitting otter switch to alloy rad

Post by ScimmyMike » Mon Jun 19, 2017 3:55 pm

I'd suspect if from GW's that it would be made to accept the standard type of otter switch which pushes in through a tapered seal with a ss clip around it also held by the same seal


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Re: fitting otter switch to alloy rad

Post by scimjim » Mon Jun 19, 2017 4:00 pm

Yep, exactly the same as you'd fit an otter switch to the steel rad :-)


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Re: fitting otter switch to alloy rad

Post by jibowski » Mon Jun 19, 2017 4:26 pm

I've never seen one before, does it clip into the hole as such or have a grommet that you force the otter into, does anyone know where kits are available?

I was surprised that the radiator had an otter hole as standard, my car still runs the engine driven fan with a kenlowe for additional cooling on a suplimentary switch for driving in traffic, so no need for an otter switch.



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Re: fitting otter switch to alloy rad

Post by philhoward » Mon Jun 19, 2017 4:36 pm

Graham Walker will have the switch, clip and seal.

Centre the clip over the hole in the rad, put the seal through both holes, then push the otter switch through the hole in the seal until the two ears of the clip hold the switch in place. For belts and braces, gently hold the two ears together with a small cable tie.

Note - order 2 seals. They are a "use once only" seal and if you have a leak or have to remove it, you'll be glad of the second one. The seals are only about a pound from memory.


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Re: fitting otter switch to alloy rad

Post by scimjim » Mon Jun 19, 2017 4:43 pm

I'd ditch the engine mounted fan and run the kenlowe through a (new) standard otter switch?


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Re: fitting otter switch to alloy rad

Post by philhoward » Mon Jun 19, 2017 4:48 pm

Might need a relay adding to be safe - but no need to keep the engine fan unless you're doing a lot of towing.


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Re: fitting otter switch to alloy rad

Post by ScimmyMike » Mon Jun 19, 2017 4:55 pm

And keep the spare seal in the car somewhere, lose the seal you can replace it, if you have one, they go hard with age, tbh mine 6 years old and was like plastic it was that hard when I put the switch into a new radiator after a recore, that's when they fail, if lucky your otter switch and clip may well still be on the wires, if not you've a 20mm or so hole that'll need filing before you can go anywhere, I keep a spare switch & seal in my car having seen tha issues loosing either causes


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Re: fitting otter switch to alloy rad

Post by peter freeman » Mon Jun 19, 2017 6:51 pm

The rubber seal B is fitted through the retaining clip A then the pair are entered into the rad hole. The otter switch C is then pushed into the A&B pair and the switch causes the end of the rubber seal to spread outwards preventing them all from being withdrawn from the hole. I also fit a small cable tie around the spring clip A to prevent the clip from opening ( and allowing the switch to come out ) it also does no harm to cable tie the whole assembly to the rad. Belt, braces and suspenders. I "stole" this photo from a previous posting ( could well have been posted by Roger ) - expecting the fitting question to be asked again.
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Re: fitting otter switch to alloy rad

Post by Roger Pennington » Mon Jun 19, 2017 6:59 pm

I can't remember if I posted that (I hope I did, as it's a useful pic, but I'm not sure...) I certainly did post this pic of the first stage of my belt'n'braces arrangement, with stainless lockwire around the switch and rad, this would then be followed by the second stage, a ty-wrap round the clip "ears"

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Re: fitting otter switch to alloy rad

Post by peter freeman » Mon Jun 19, 2017 8:33 pm

All I did was enter the A,B and C



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Re: fitting otter switch to alloy rad

Post by scimjim » Mon Jun 19, 2017 8:51 pm

A doesn't enter anything, you have to put the seal (B) into it first and that has to go into the rad before the otter switch (C) is fitted to splay the seal. If you put it all together and force it into the hole it can split the seal.


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Re: fitting otter switch to alloy rad

Post by peter freeman » Mon Jun 19, 2017 8:59 pm

I think you have been a bit picky Jim - obviously the clip cannot enter the hole but as a part of the whole does.



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Re: fitting otter switch to alloy rad

Post by scimjim » Mon Jun 19, 2017 9:05 pm

Sorry, I couldn't see what "enter the A, B and C" added to the post - nor "as a part of the whole does"

B into A, into the rad, then add C - as Roger said?

Edit Phil, not Roger.
Last edited by scimjim on Mon Jun 19, 2017 9:56 pm, edited 1 time in total.


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SECURE DRY STORAGE FOR YOUR SCIMITAR

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Re: fitting otter switch to alloy rad

Post by Roger Pennington » Mon Jun 19, 2017 9:38 pm

I think wires have got crossed! Peter "entered" the A, B, and C on the photo (which may or may not have been my photo in the first place) to complement his description of how it goes together. I only added the photo of part of the belt & braces! :)


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