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engine cooling

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by Jean » Tue Oct 02, 2018 9:29 pm

Thank you all.
going to strip my fans down!

Jean
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by Jean » Thu Dec 13, 2018 9:59 pm

Dear all,
thanks a lot for the valuable advice provided. The overheating of the engine was actually due to the fans sold by Rejen as Bosch, made in China and powering 75 W each. I replaced them with Hella ones (250 W each) et voilà!

See you!

Jean
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by Steve Payne » Thu Dec 13, 2018 10:20 pm

Have you also uprated the alternator to cope the extra amp requirement? The standard alternator will struggle with these big fans, it will be OK just with the fans on but with the headlights, wipers and heater fan on you are drawing from the battery.

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by Barrie » Fri Dec 14, 2018 12:10 am

I've just come across this thread.
I thought I had a 'hot' engine but after buying a laser thermostat I found I just had a hot-reading dashboard gauge.

Then I had a variable fan speed controller installed which speeds up the fans as the engine gets hotter. Consequently the engine never builds up an amount of latent heat that the water system cannot then cool. This year my CV8 performed faultlessly in 33c temperatures whilst in central London traffic
“Even in a time of elephantine vanity and greed, one never has to look far to see the campfires of gentle people." Garrison Keillor
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by Frankoid » Tue Dec 18, 2018 3:58 pm

Barrie wrote:I've just come across this thread.
I thought I had a 'hot' engine but after buying a laser thermostat I found I just had a hot-reading dashboard gauge.

Then I had a variable fan speed controller installed which speeds up the fans as the engine gets hotter. Consequently the engine never builds up an amount of latent heat that the water system cannot then cool. This year my CV8 performed faultlessly in 33c temperatures whilst in central London traffic


What "variable fan speed controller " system are you using Barrie? It sounds very good..
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by Richie » Tue Dec 18, 2018 6:45 pm

Probably the same "Autocool" system as me... and which I would thoroughly recommend.
Steve Payne is your man for this...
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by Barrie » Wed Dec 19, 2018 9:11 am

Mine was made but Delta but I can’t immediately find a web link. However I seem to remember Steve Payne has found another superior type.
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by Frankoid » Wed Dec 19, 2018 9:22 am

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by Steve Payne » Wed Dec 19, 2018 9:33 am

Frankoid wrote:Is it this chap?

http://www.autocoolguy.com/


Nope this is the link :wink: :wink:

http://autocooling.co.uk/

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by fasteddie » Thu Dec 20, 2018 7:16 pm

Jean wrote:Dear all,
thanks a lot for the valuable advice provided. The overheating of the engine was actually due to the fans sold by Rejen as Bosch, made in China and powering 75 W each. I replaced them with Hella ones (250 W each) et voilà!

See you!

Jean

I do not understand this so called company. Done the same to me with same result. Rejen, never call you back, answer your email. They are the worst communicators I have ever come across in all my years in business. ,
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by Joe Schiavone » Sun Dec 23, 2018 2:32 pm

The motor with fan blades attached has an optimum location in to pulling air through the shroud. Typlicly if you do not locate the fans correctly depth wise you can deminish the pulling capacity of air through the radiator. Also it is imperative there are no other routes the air coming into the front grill has no other route to go other than the radiator. All is assumed facts all other parts at functioning properly. A smooth radiator hose easily flows the most water RacerJoe
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