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by simon8201 - 09/09/26 01:46 PM
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Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Jan 2015
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OP
L - Learner Plates On
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Firstly, apologies as I'm sure this subject has been raised before, but for the life of me I can't find the right thread
PROBLEM. I have just replaced the original radiator on my 1967 TR4a engined Plus 4 DHC with a new aluminium one from Mulfab and my thick fan belt and pulleys with the newer thin version. There is insufficient room on the engine side for the old cooling fan and also no attachment points on the water pump pulley, so the obvious answer would seem to be a "Pusher" type electric fan in front of the radiator.
Has anyone done this, if so, what fan did you use and have you had any adverse effects?
Many thanks in advance
Last edited by Sinbad; 03/10/18 03:23 PM.
1967 Plus 4 Drophead coupe with a TR4a engine
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Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
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Is this of any use at all.
http://www.talkmorgan.com/ubbthreads.php/ubb/showflat/Number/519847/Searchpage/2/Main/33535/Words/cooling+fan/Search/true/Re:_Electric_Fan_for_4/4#Post519847
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Scruffy Oik Member of the Inner Circle
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Scruffy Oik Member of the Inner Circle
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A much better solution than a 'pusher' fan is a SPAL fan. They mount direct to the radiator and have a very low profile. They come in loads of sizes, the smallest is only 47mm deep. It has 5 inch diameter blades so you could fit two, one above the other. Available from Demon Tweeks among others.
Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
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Joined: Sep 2010
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Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2010
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SPAL were O/E on plus 8’s at one time, good fans...
1969 4/4
1995 plus 8
1996 Plus 4 4seater
2002 Aero S1
2013 M3W
2014 Plus 8
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Joined: Aug 2008
Posts: 2,515 Likes: 1
Talk Morgan Expert
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Talk Morgan Expert
Joined: Aug 2008
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A much better solution than a 'pusher' fan is a SPAL fan. They mount direct to the radiator and have a very low profile. They come in loads of sizes, the smallest is only 47mm deep. It has 5 inch diameter blades so you could fit two, one above the other. Available from Demon Tweeks among others. I have a Kenlowe on mine but I'd certainly be tempted by SPAL if I was doing it again. Loads of information on this link.
1972 4/4 2 Seater
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Joined: Sep 2014
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Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2014
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The TR engined +4s can run quite hot , so fan-assisted cooling is good idea.
The standard engine driven fan was never up to much anyway , so don't have any concerns about running without it.
As others have said do not put a fan in front of the radiator, it hinders air flow and stops cooling (the hindrance is proportional to the square of the area of the fan and brackets)
The "puller" type fans are much better in this respect , yes they do hinder the air exiting the radiator , but not to the same extent.
I would personally go with the SPAL , but others are available. Your radiator may already have the brackets in place, which makes fitment much easier, if not I am sure Peter Mulberry will oblige.
Regarding electrical installation the fan is a high current item, and the early +4s had very little in the way of electrical circuit protection. Be sure to fit both a relay and a fuse it. Although normally controlled automatically by an "otter" switch , some folk recommend a manual override in addition to the auto system. This is easy to install when you do the fitment, it is also a useful check to ensure the fan is working.
Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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You mention the "otter" switch which, I think, on most models is placed at the bottom of the radiator which is the coldest. I have put in a mod from Car Builder Solutions" that places the temperature switch in the top hose. Seems to work without the problem of getting the "otter" switch out of the radiator.
John
1992 plus4 connaught green
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L - Learner Plates On
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L - Learner Plates On
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At the radiator output is the best place for a fan switch as when the temperature rises that tells you the radiator needs help. The input, on the other hand, will always be hot, having just come from the engine, and detecting when the radiator needs the fan on will then be more difficult.
Dave
2008 Plus 4
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Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,695 Likes: 415 |
Dave's logic is fine as long as the the coolant temperature at bottom hose is within the switch temp range.
Remember though the fan is there primarily to protect engine so sensor on or close to cylinder head feed to top hose would pre-empt insufficient rad cooling, allowing fan to cut in sooner.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
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Firstly, apologies as I'm sure this subject has been raised before, but for the life of me I can't find the right thread
PROBLEM. I have just replaced the original radiator on my 1967 TR4a engined Plus 4 DHC with a new aluminium one from Mulfab and my thick fan belt and pulleys with the newer thin version. There is insufficient room on the engine side for the old cooling fan and also no attachment points on the water pump pulley, so the obvious answer would seem to be a "Pusher" type electric fan in front of the radiator.
Has anyone done this, if so, what fan did you use and have you had any adverse effects?
Many thanks in advance Suggest You look at installing a Honda thin fan with shroud on the inside of Your radiator. You do this by extending the rad perches and moving the rad forward. Contact Me offline and I will send You information. wmbutton@gmail.com BTW: this is a U.S. product called "Flex O Lite".
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