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Sold
by simon8201 - 09/09/26 01:46 PM
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Wales
by Joske Vermeule, September 1
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Forums39
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Jun 14th, 2026
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Joined: Dec 2011
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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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". Sorry I failed to answer Your second question. Yes I use a SPAL fan in front of My +8 Radiator. It works OK at slow speed (In traffic) but at 70 MPH pulling a long hill My +8 heats up. I must slow down to about 50 MPH to cure this. My theory is the Spal Fan in front acts like a air blocker at speed.
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Joined: Aug 2008
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Talk Morgan Expert
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Talk Morgan Expert
Joined: Aug 2008
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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". Sorry I failed to answer Your second question. Yes I use a SPAL fan in front of My +8 Radiator. It works OK at slow speed (In traffic) but at 70 MPH pulling a long hill My +8 heats up. I must slow down to about 50 MPH to cure this. My theory is the Spal Fan in front acts like a air blocker at speed. Is the area under the radiator blocked off? It's said that otherwise air pressure can build up in the engine compartment restricting air flow through the radiator.
1972 4/4 2 Seater
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Joined: Jan 2015
Posts: 112
L - Learner Plates On
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OP
L - Learner Plates On
Joined: Jan 2015
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Thank you guys for your input. Your help is appreciated.
1967 Plus 4 Drophead coupe with a TR4a engine
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Joined: Jan 2015
Posts: 112
L - Learner Plates On
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OP
L - Learner Plates On
Joined: Jan 2015
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I have ducting from the grill right up to the front of the radiator so all air passing through the grill must pass through the radiator. A build-up of air pressure within the engine compartment could be a problem especially on my DHC as it has no vents on the bonnet top
1967 Plus 4 Drophead coupe with a TR4a engine
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
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". Sorry I failed to answer Your second question. Yes I use a SPAL fan in front of My +8 Radiator. It works OK at slow speed (In traffic) but at 70 MPH pulling a long hill My +8 heats up. I must slow down to about 50 MPH to cure this. My theory is the Spal Fan in front acts like a air blocker at speed. Is the area under the radiator blocked off? It's said that otherwise air pressure can build up in the engine compartment restricting air flow through the radiator. NO! But it has been in the past and blocking under the rad is a good idea. Read Dwight Smith article on GOMOG.
Button
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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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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". Sorry I failed to answer Your second question. Yes I use a SPAL fan in front of My +8 Radiator. It works OK at slow speed (In traffic) but at 70 MPH pulling a long hill My +8 heats up. I must slow down to about 50 MPH to cure this. My theory is the Spal Fan in front acts like a air blocker at speed. Is the area under the radiator blocked off? It's said that otherwise air pressure can build up in the engine compartment restricting air flow through the radiator. NO! But it has been in the past and blocking under the rad is a good idea. Read Dwight Smith article on GOMOG. Article link.
1972 4/4 2 Seater
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Joined: Apr 2017
Posts: 1,799 Likes: 4
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Apr 2017
Posts: 1,799 Likes: 4 |
Have a look at the Revotec range of electronic fan controllers from Merlin Motorsport.
They do an inline range to suit various hose diameters and they can be set to whatever temperature you choose.
Bob
2009 Black Roadster
1999 4/4 2 litre Zetec
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
Have a look at the Revotec range of electronic fan controllers from Merlin Motorsport.
They do an inline range to suit various hose diameters and they can be set to whatever temperature you choose. The Flex A Lite controller is a bulb and a wire that goes under the hose clamp into the hose. Not good. Hard to seal. Also if You live in the UK use a UK product if at all possible.
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Joined: Jan 2015
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L - Learner Plates On
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OP
L - Learner Plates On
Joined: Jan 2015
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UPDATE ON MY FAN SAGA. Since fitting my new Ali rad I have now installed a 14" Spal electric pusher fan in the inlet trunking of my Plus 4. I also took the opportunity to replace all of the hoses with new silicon ones, flush the cooling system and refill with Evans Waterless Coolant. Job eventually finished lunchtime yesterday so decided a test drive was in order whilst the weather was being kind. I covered just under 50 miles of town, country and duel carriageway driving and provisionally am very happy with the results. I did wonder if the dynamo would cope with the extra load but the amp meter continued to show a charge whilst the fan was running and the indicated water temperature appeared slightly lower than before. There is one aspect I'm not entirely happy with though and that is the fact that the fan sensor is located below the thermostat and therefore triggers the fan before the 'stat opens. I am considering the possibility of moving it to the top radiator hose. Your thought would be appreciated. Thank you
1967 Plus 4 Drophead coupe with a TR4a engine
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Joined: Apr 2014
Posts: 6,960 Likes: 117
Talk Morgan Sage
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Talk Morgan Sage
Joined: Apr 2014
Posts: 6,960 Likes: 117 |
Best Regards
Lang may yer lum reek
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