Cooling Fan

Talk about the E-Type Series 2

Topic author
Ian Cooke
Posts: 123
Joined: Wed Oct 17, 2012 6:30 pm
Location: Hampshire
Great Britain

#1 Cooling Fan

Post by Ian Cooke » Mon Aug 15, 2022 7:52 pm

Hi all

My Series 2 has a single Kenlowe Fan which will often continue running for up to 10 minutes after the ignition has been switched off. Is this normal / necessary as it must result in a significant drain on the battery?

Thanks for any advice

Ian
Ian Cooke
1969 S2 FHC in Old English White

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

DWW
Posts: 360
Joined: Sat Mar 12, 2022 1:14 am
Great Britain

#2 Re: Cooling Fan

Post by DWW » Mon Aug 15, 2022 8:36 pm

Looks like the fan relay wiring is incorrect. On S! the relay is connected to fuse No 6.
Danny

1962 S1 3.8 FHC (1012/1798)
2015 Range Rover Sport SVR

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

abowie
Posts: 3645
Joined: Wed Sep 07, 2011 9:15 pm
Location: Australia
Contact:
Australia

#3 Re: Cooling Fan

Post by abowie » Mon Aug 15, 2022 11:11 pm

Or it's just been wired directly to the battery.
Andrew.
881824, 1E21538. 889457. 1961 3.4l Mk2. 1975 XJS.
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

Link:
BBcode:
HTML:
Hide post links
Show post links


johnetype
Posts: 465
Joined: Sun Feb 26, 2012 11:54 pm
Location: Worcestershire
Great Britain

#4 Re: Cooling Fan

Post by johnetype » Tue Aug 16, 2022 12:27 am

It is normal depending on how the Kenlow fan has been wired - as Andrew suggests.

If it only runs for 10 mins or so the drain on the battery is insignificant.

The highest temperature the engine and cooling system will routinely see is in the few minutes after the engine is stopped which is why the Kenlow is cutting in and will help limit that rise.
John

1969 Series 2 FHC

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

abowie
Posts: 3645
Joined: Wed Sep 07, 2011 9:15 pm
Location: Australia
Contact:
Australia

#5 Re: Cooling Fan

Post by abowie » Tue Aug 16, 2022 1:37 am

johnetype wrote:
Tue Aug 16, 2022 12:27 am


The highest temperature the engine and cooling system will routinely see is in the few minutes after the engine is stopped which is why the Kenlow is cutting in and will help limit that rise.
Will it if there's no coolant flow through the engine?
Andrew.
881824, 1E21538. 889457. 1961 3.4l Mk2. 1975 XJS.
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

Link:
BBcode:
HTML:
Hide post links
Show post links


Topic author
Ian Cooke
Posts: 123
Joined: Wed Oct 17, 2012 6:30 pm
Location: Hampshire
Great Britain

#6 Re: Cooling Fan

Post by Ian Cooke » Tue Aug 16, 2022 7:48 pm

Many thanks for your responses.

It sounds as though the fan running on after the ignition has been switched is ok but what i'm not clear on is whether there is any need or benefit to it doing so.

Do other fans continue to run when the engine has stopped or is it just the Kenlow that has this feature?
Ian Cooke
1969 S2 FHC in Old English White

Link:
BBcode:
HTML:
Hide post links
Show post links


MarekH
Posts: 1394
Joined: Wed Jul 21, 2010 8:30 pm
Location: Surrey
Great Britain

#7 Re: Cooling Fan

Post by MarekH » Tue Aug 16, 2022 8:10 pm

johnetype wrote:
Tue Aug 16, 2022 12:27 am
....and will help limit that rise.
As Andrew points out, with no water circulation, it won't do very much at all.

To make it effective, see
https://forums.jag-lovers.com/t/solving ... ple/377151

Look at the dark blue line. This is the temperature at the bottom of the radiator. When the fan cuts in, a nice pool of cold water is generated, but none of it is useful until it is swapped with the hot water sitting in the cylinder heads. That is achieved by running the engine for no more than 45 seconds. That cools the engine a lot, whereas just running the fan achieved pretty much nothing. It's all there on the graph in black and white.

kind regards
Marek

Link:
BBcode:
HTML:
Hide post links
Show post links

Post Reply Previous topicNext topic