MGC Forum

How involved a task is it to fit one of these twin fan kits to a C? Bit of an open question I know. Is the kit completely complete ? I don't want to incapacitate my car for days as I source switches and sensors etc
How long should it take? (fairly competent and have lots of tools!)
TIA as always

John just an observation but what's the driver behind wanting an electric fan? I've had no trouble with my cooling system, even in high temperatures on the continent. Clearing out the casting mess behind the waterpump helped.

Noise mainly, and maybe gain a couple of HP along the way. The car doesn't overheat (yet!)

If noise is a concern I don't know if you are going to like the electric setup anyway. They are just a different kind of noise. Which at times can be somewhat annoying. Just my personal experience.

I keep reading that the fan is really noisy on a C! I can certainly hear mine

Hey John,

To answer your questions, yes, everything is included in the kit. As far as how long, it depends on how fast you work. Basically you need to remove the rad, install the fan assembly on it, install the temp sensor into the coolant hose, drop the whole assembly back in and then hook up the wiring. A professional mechanic could probably do it in an hour or so. I'm a leisurely worker so it would take me 3 hours or so.

It is considerably quieter than the OEM fan and it's only really on when the car is not moving or moving very slowly so that background fan noise is gone while driving.

Here are so pics of the installation below:

Ken

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MG: Transforming gasoline into Fun!!!



Edited 1 time(s). Last edit at 2024-04-12 11:15 AM by Ken Plumstead.

It is a nice setup for sure.

John,

I have a MGC Revotec kit fitted to the Dutchman. It was fitted by Doug Smith and his team at MG Motorsport.

The MD of Revotec asked if a new mounting design could be tried on my car. This kit comprises two smaller diameter fans mounted horizontally low down on the radiator, rather than staggered as shown in Ken's photos, so it sucks air through the hottest part of the radiator (when the water is circulating). Once stocks of the old kit have been used up the suppliers will sell the new style kit.

It's been great and the fans are quite quiet when the engine is running. The issue for me was where the power supply came from. Doug's team ran it from the fuse box but as I found out on a humid day, when our MG rally met a tractor rally on a single-track road with passing places, and I had the HRW on (for the second time ever) when the fan cut in the fuse (35A) blew. I noticed the temperature rising and no fan sound and pulled over. 30 seconds to fix with a new fuse and the HRW switched off!

To solve the problem my local MG mechanic ran the power supply from the hi-torque starter motor with a blade 20 A fuse to the fans. This has worked well for the last seven months but on a Drive-it-Day rally on a crawl through the countryside, I noticed the temperature rising but I couldn't hear the fans running. It was a lovely scenic spot that we stopped at. My son (28 yro) who was navigating enjoyed it. Foolishly I had not thought of this problem with my breakdown kit. As the cavalcade of MG's passed a plea for a 20A blade fuse fell on deaf ears. I am sure modern MGF and MGTFs have blade fuses! Anyway, a D-reg (early) MGB roadster driver came to the rescue and fortuitously had a 20A blade fuse. I fitted it and we were on our way after just 10 minutes and arrived in time for Sunday lunch at the Wellbeck Manor golf club at Sparkwell, Plymouth.

I now have a selection of blade fuses in the boot! I also followed up by downloading the pdfs on the Revotec fan kit and the fan controller. No mention of the rating of the fans or what fuse rating is recommended. I phoned Revotec and explained my problem. They don't put those details in their data sheets as each setup is different. The fans are wired in parallel but each takes 12.4A, plus starting current, so it's amazing that the fuse lasted as long as it did. The recommendation was to up the fan fuse from 20A to 25A in the interim until I rewire the fans as Revotec recommends which is individually with a 20 A fuse to each. This allows some redundancy: if a fuse blows you still have 50% cooling.

So I will get this done and all should be well for a long time to come.

Two of the photos are older and the others are ones where I tried to capture the installation this afternoon. Not easy. The two fans are mounted in a frame that sits on the bottom lip of the radiator. It's very sturdy.

It's always good to have a look around the engine. There is a tiny weep from the top radiator hose leading to the thermostat housing which will require the tightening of the Jubilee clip.

Gavin