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Fitting electric radiator fan


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#1 crops

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Posted 10 May 2018 - 05:49 PM

After over heating in a long queue of traffic on bank holiday Mondays hot day. I'm wanting to fit an electric fan Rimmer Bros do a kit. The two question I have:  Do I remove the plastic fan from the water pump. Letting the electric fan do the cooling which I would fit with a temp switch in the bottom hose and secondly which side of the radiator would I fit the electric fan!  Welcome comments.


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#2 RogerH

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Posted 10 May 2018 - 06:00 PM

Hi, have a look at the search facility. It may be worth doing it through Google as the TTR search doesn't like three letter words.

 

eg https://www.tr-regis...n-electric-fan/

 

Fit a puller fan if possible they are more efficient.

 

Roger


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#3 peejay4A

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Posted 10 May 2018 - 06:32 PM

Fit a Revotec puller fan on the engine side of the radiator. It comes with a dedicated mounting frame and is easy to fit. Remove the plastic fan.
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Pete 

#4 BlueTR3A-5EKT

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Posted 10 May 2018 - 07:11 PM

Depending on your approach to DIY and engineering skills on the TR....

 

I am selling a NOS Spal pusher fan on BST.

https://www.tr-regis...sher-type-Qty-1

 

I bought it to mount in front of the radiator as a manual self switched supplement to the standard engine fan.

I think I have the plastic tie wrap type mounts to attach it to the radiator core somewhere if you are interested.

This sort of thing. https://www.demon-tw...ng-kit-set-of-4

Cheers

Peter W

 

PS The full Revotec kit available for TR6.  https://www.motoringclassics.co.uk/classic-car-parts-uk/electronic-cooling-fan/revotec-triumph-tr5-tr6-suction-cooling-kit or   https://www.revingto...-c&affiliateid=


Edited by BlueTR3A-5EKT, 10 May 2018 - 07:29 PM.

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#5 Rem18

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Posted 10 May 2018 - 08:24 PM

Dont buy a fan. Just fit an oil cooler and cool whats best for your engine and gives better oil pressure.

I live in a hot climate drive hard and have traffic to and from my garage (I live in town center) I even ran my car once with an empty radiator (due to a leaky lower hose) and the engine survived fine thanks to the cooler.

There is another thread here where a blown fuse meant no fan and now a damaged engine.

Better the devil you know????

If I remember there also used to be stuff about crankshaft balance after.?


Edited by Rem18, 10 May 2018 - 08:30 PM.

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#6 RobH

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Posted 10 May 2018 - 08:46 PM

There has been considerable previous chat here about oil coolers Rem and the consensus seemed to be that in the UK for road use they are unnecessary as the oil doesn't really ever reach the proper temperature anyway.   A high oil pressure is not necessarily good if it is caused by thick oil which doesn't flow.  Oil flow is important - pressure not so much.  


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#7 ed_h

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Posted 10 May 2018 - 09:12 PM

Here is a story about choosing and mounting a fan and thermal switch, with a lot of pictures.

 

http://bullfire.net/...-58/TR6-58.html

 

Ed

 

IMG_0895a.JPG


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For just a little more, you can do it yourself!

 

http://bullfire.net/TR6/TR6%20TOC.html

 

 

 


#8 peejay4A

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Posted 10 May 2018 - 10:45 PM

I cannot see how an oil cooler would help in traffic when there is no air flow. Fit an electric fan with an override if you wish. By all means leave the plastic fan on for belt and braces but it will be fine without. Dont worry about crankshaft balance, there is a damper fitted and the mass of the plastic fan is not significant.

Edited by peejay4A, 11 May 2018 - 09:16 AM.

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Pete 

#9 Rem18

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Posted 11 May 2018 - 07:33 AM

As you wish.

Just referring my personal experience. Even standing the cooler gives off significant heat and I dont think I have ever seen the car go significantly hot.

My indication regards pressure was just indicative and as a point regards an extra you get with the cooler.

I dont really agree regards the temperature as my car normally sits just below half temp on a cooler.

All I can say is that 30 years driving in temperature ranges of -10 to 40c° here just below the alps where we have hot summers and cold winters with no problems so far, same engine good bearings etc (touch wood). A fan is just another thing to go wrong IMHO. But as you prefer

There has been considerable previous chat here about oil coolers Rem and the consensus seemed to be that in the UK for road use they are unnecessary as the oil doesn't really ever reach the proper temperature anyway.   A high oil pressure is not necessarily good if it is caused by thick oil which doesn't flow.  Oil flow is important - pressure not so much.  


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#10 brian -r

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Posted 11 May 2018 - 08:38 AM

My car came with no engine fan and some strange electric thing which didn't work very well.

 

Replaced with a Kenlow front mounted   kit from Rimmers  afterwards I saw the revotec  unit and it looks a better made unit , the mounting brackets are certainly better.

 

After a sensor failure I also fitted a second relay fed supply direct to the fan with switch and indicator light in the dash

 

Brian


Edited by brian -r, 11 May 2018 - 08:44 AM.

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Brian Ranshaw


#11 Andy Moltu

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Posted 11 May 2018 - 03:45 PM

My experience with the Revotec switch s has been negative both didn’t last long.

Fit a switch in the bottom hose the usual TR vendors sell the stainless bottom hose with a 22mm boss for a switch to go in that takes standard switches. I’ve forgotten which this is.

Alternatively get a 22mm boss soldered into the top of the rad and fit a switch with an off setting 4degrees c above you thermostat temp.
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#12 Tim D.

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Posted 11 May 2018 - 09:22 PM

Agree that an oil cooler can be over kill. But worth sharing one experience. We did a trip to Spa for the classic and did a few track laps. We spent the whole set off track laps behind a beautiful TR5 in my beat up TR6. After the 5 laps the TR5 had 0 psi at idle and an annoyed owner (engine had been rebuilt). We had the same oil pressure as when we started. The previous year we had no cooler and were in the same situation as the TR5 owner. So in this case an oil cooler is perhaps a benefit.
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#13 peejay4A

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Posted 12 May 2018 - 08:38 AM

80mph + with an oil cooler and with lots of airflow I can buy. Stationary in traffic though I am doubtful about other than the increased volume of oil taking a bit longer to dissipate heat.
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#14 Rem18

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Posted 12 May 2018 - 09:59 AM

Haha Tim your contradicting yourself.

Seriously thats still my point, an oil cooler is great if you want to put your foot down a bit, once oil gets a bit of a paddling the oil cooler shows its worth, all I was saying is that its no more overkill than the fan, mods, wires and stuff.

I live in a hot climate with a 6 bought from new by my father and my 5. Neither have an electric fan, the 6 has uprated relief spring and rocker feeder, the 5 just an oil cooler without thermostat.

I just warm her up a bit and dont accelerate hard at first.

The 6's oil thins out in traffic or after a burn and pressure drops. The 5 doesnt suffer in a burn or traffic and as I wrote previously once the bottom hose had leaked all the water out overnight and I hadnt noticed and thanks to the cooler I drove home through town and 'I didnt blow the head', with a fan probably it would never have cut in without water.

I can understand the idea that stopped oil rad doesnt make a difference, but I think it does. Also the extra 1L of oil seems to actually help too as I think it means more fluid for dissipation.

A friend who was Tech head at 2x F1 teams and designed a world championship car once told me that Oil cools much more than water, he's credentials are right but I dont know, all I can say is it works for me. I have been an organisor of the 50in5 Alpine jaunt (50 alpine passes in 5 days on 2,000+kms which we are probably restarting), my 5 has done it many times.

Anyway plenty of mountains to climb and the pressure always good and no overheating.

I am no expert but with a family 6 that has 47 years on original engine and a 5 with 25 years on a cooler all I can say is 'Im still here' Oops should I have said that???

Mine was just a suggestion as an alternative on what has worked for me, I dont want to upset anyone or cause a ping pong.

The real solution is know your car.... :rolleyes:

 Agree that an oil cooler can be over kill. But worth sharing one experience. We did a trip to Spa for the classic and did a few track laps. We spent the whole set off track laps behind a beautiful TR5 in my beat up TR6. After the 5 laps the TR5 had 0 psi at idle and an annoyed owner (engine had been rebuilt). We had the same oil pressure as when we started. The previous year we had no cooler and were in the same situation as the TR5 owner. So in this case an oil cooler is perhaps a benefit.


Edited by Rem18, 12 May 2018 - 10:11 AM.

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#15 crops

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Posted 12 May 2018 - 04:31 PM

Thanks for all your comments and taken onboard


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#16 jerrytr5

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Posted 13 May 2018 - 06:28 AM

You shouldn't be overheating with the standard engine driven fan anyway.

Get your rad re-cored first, and flush the cooling system.

Don't treat the symptoms without dealing with the cause.

Jerry


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#17 SteveB21

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Posted 13 May 2018 - 05:14 PM

+1 for the Revotec fan and mounting brackets, also for removing the engine block drain plug and flushing the system first.

Steve
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#18 RogerH

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Posted 13 May 2018 - 05:23 PM

You shouldn't be overheating with the standard engine driven fan anyway.

Get your rad re-cored first, and flush the cooling system.

Don't treat the symptoms without dealing with the cause.

Jerry

Hi Jerry,

            I agree that you should sort out the cause first etc.

However with no forward movement (TRafic jam) the standard engine mounted fan will eventually the engine to overheat.

The electric fan can be brought on line before the engine gets hot and help cooling a great deal.

 

Roger


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Time is a drug - Too much will kill you
Forgive your enemy, but remember the ass-hole's name.
never surrender, never give up and always balance your butterflies

Veni Vidi Flati
TR4A - July 1967 daily driver         2010 RBRR No.22  2014 RBRR No.69
TR4 - March 1962 transforming like the proverbial caterpillar - it's now Royal Blue and now with the chromy bits.
 
 
 
 
 

#19 ed_h

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Posted 13 May 2018 - 06:20 PM

Another reason to consider electric cooling fan:

 

https://www.youtube....h?v=ZXdLgaFXZzs

 

 

Ed


Edited by ed_h, 13 May 2018 - 06:21 PM.

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For just a little more, you can do it yourself!

 

http://bullfire.net/TR6/TR6%20TOC.html

 

 

 


#20 Waldi

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Posted 13 May 2018 - 08:22 PM

Thanks Ed,
I didnt know it was that much!
Now the comparison:
Say that for TR we might loose say 5 hp or around 4kW on the original fan, based on the movie.
But the current draw of an electric fan is not that high, say 12A which equals 12X12 = 144 W, say 0,2 hp.
So why is there such a difference in power consumption between an electric fan and a mechanical driven fan?
I gues fan speed and blade design play a role?
Or is there more into it?
Regards,
Waldi
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