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tow bar
by G Walker - 24/08/26 06:52 PM
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Forums39
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Jun 14th, 2026
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Joined: Jan 2009
Posts: 113
L - Learner Plates On
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L - Learner Plates On
Joined: Jan 2009
Posts: 113 |
I owned a 4/4 LM62 for a short time .One of its many faults was a fan that was on permanently after engine had warmed up.I was told this was an unfortunate characteristic of the car.
Regards
Gerry ( now a happy Plus 4 owner)
Verbum sapienti sat est.
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Joined: Oct 2007
Posts: 1,502
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Oct 2007
Posts: 1,502 |
Can't a fan be switched by a simple sensor rather than via the ECU?
Nigel
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Joined: Dec 2008
Posts: 22,356 Likes: 353
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 22,356 Likes: 353 |
Probably, unless it upsets the ECU if the fan motor is disconnected. My Gilbern had no sensor, so I invested in a conical hole cutter, and made a hole in the radiator header tank big enough to take a late spec MGB fan sensor. This worked well, but it was a risky job making a 3/4 hole in the rad!!!!!  You can see it here........... 
Last edited by DaveW; 08/07/09 08:16 PM.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: May 2008
Posts: 1,103 Likes: 2
Has a lot to Say!
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OP
Has a lot to Say!
Joined: May 2008
Posts: 1,103 Likes: 2 |
I can see that I may end up replacing back the 'faulty relay' and wait and see if it gets too hot again. I have to admit it overheated on the hottest day (32C) in UK and I had a rally plaque on the front grille so everything stacked against it. It certainly hadn't complained previous to this...
And I am sure it will be annoying...at least I have an option now.
We will see..
Keith
Car 54 - 'Le Mans 62' 4/4 Supersport
OxMog Member (and associated with CranMog and SwanMog)
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Joined: Oct 2007
Posts: 1,502
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Oct 2007
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Bump!
Found this thread and thought I'd ask if anyone has found a solution, because it describes exactly what was happening to my 2005 Zetec 4/4 last summer.
On a hot day, once engine fully warm, the fan was on continuously while moving, only stopping when the car was stationary. Temp on the gauge showing 100-110 deg, no more.
I was blaming this on local underbonnet heat since changing to a 4-2-1 s/s manifold (Librands), with heat from the manifold heating the water pipes, which run above it. My plan was to insulate the manifold and /or the water pipes. Or even change to a bigger (Mulfab) radiator. But now I wonder if its an electronic problem?
Nigel
Last edited by nputtick; 30/01/14 10:24 AM.
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Joined: Aug 2011
Posts: 7,553 Likes: 88
Talk Morgan Guru
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Talk Morgan Guru
Joined: Aug 2011
Posts: 7,553 Likes: 88 |
Nigel
My 2003 - 4/4 has a 1.8 Zetec and the only two issues I have had with it in 33,000 miles are needing to replace the fan relay (I now carry a spare) and the dash control module (that started to fault at 12,000 miles resulting in faulty warning lights and insrument readings)
The fan only comes in when the engine gets hot (usually in traffic) despite the car having reduced louvres.
I do ensure that I keep the radiator matrix clear of dead flies and muck and I don't have a mesh radiator grille.
PM me if you need any more details
Bud
4/4 "Stanley"
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Joined: Mar 2009
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Talk Morgan Expert
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Talk Morgan Expert
Joined: Mar 2009
Posts: 2,290 Likes: 9 |
Would it help to fit an separate on/off switch to control the fan>
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Joined: Jun 2020
Posts: 22 Likes: 9
New to Talk Morgan
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New to Talk Morgan
Joined: Jun 2020
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Does anyone know the Bosch the part number for the fan relay? My understanding is that the Hella number is 4RA 933 332-15.
Last edited by Atlantic; 10/06/26 10:44 AM.
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Joined: Dec 2008
Posts: 22,356 Likes: 353
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 22,356 Likes: 353 |
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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