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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: Jun 2012
Posts: 1,337
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Jun 2012
Posts: 1,337 |
last Friday I drove from Plymouth to Eastbourne area. After 2 hours of stop start crawling the steam appeared. It seems to be coming from the expansion tank area. Topped up with water and the drive back on Sunday the temperature behaved itself but little traffic. I need to check the fan as I think it is not working and note the other thread about the relay, but not sure how to find out exavtly where I am losing the water from. any advice gratefully received.  Pete
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Joined: Dec 2008
Posts: 534
Talk Morgan Regular
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Talk Morgan Regular
Joined: Dec 2008
Posts: 534 |
My 2005 Roadster always lost a small amount of water & I couldn't see where it was going. In the end I traced it to the clamps on either end of a short length of hose running between the rear of the engine & the bulkhead. A pig of a job to replace the clamps but it never lost water again.
Ian
3.7 Roadster
4" Ruston Procter SD Tractor
1905 Merryweather steam fire engine
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Joined: Apr 2014
Posts: 3,550 Likes: 5
Talk Morgan Addict
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Talk Morgan Addict
Joined: Apr 2014
Posts: 3,550 Likes: 5 |
Plonk a coolant system pressure tester on your expansion bottle it should be relatively easy then to trace the leak.
Mark - No Longer driving Archie the Old English Sheep Mog........... 2010 Roadster 3.0 V6 (S3) 
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Joined: Jun 2012
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Has a lot to Say!
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Has a lot to Say!
Joined: Jun 2012
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Multimeter out discovered wire in most inaccessible position was disconnected not sure how or why..... remade cable tied so it cannot pull out again. Dartmouth for coffee this am on coast road temperature was constant. Still losing some water to just below min level in expansion tank and no further. Next weekends investigation, just relieved that fan now cuts in when it should.
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Joined: Oct 2011
Posts: 1,947
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Oct 2011
Posts: 1,947 |
Possible the mark on the tank is not in the best place.
My Defender 90 always lost coolant, but once the tank was down to just below minimum, it stopped losing it. As the tank was roughly spherical, that meant the car lost via the tank overflowing, and the lower level was nothing to worry about.
Make you have spare dilute coolant and keep an eye on the level. Might be nothing to worry about.
1930 Super Sports Aero 'The Elk'
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Joined: Aug 2013
Posts: 15,794 Likes: 15
Formerly known as Aldermog Member of the Inner Circle
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Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 15 |
Multimeter out discovered wire in most inaccessible position was disconnected not sure how or why..... remade cable tied so it cannot pull out again. Dartmouth for coffee this am on coast road temperature was constant. Still losing some water to just below min level in expansion tank and no further. Next weekends investigation, just relieved that fan now cuts in when it should. I know it sounds obvious but is the header tank cap working corectly? If the pressure reliev spring is weak it will vent.
Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...
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Joined: Jun 2012
Posts: 1,337
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Jun 2012
Posts: 1,337 |
Two of the pipes on the expansion tank had very strange clips on them and the lower one certainly was suspect. Replaced with jubilee clips and replaced expansion tank cap. Sorted out the wiring (twice!!!!) for the radiator fan and all, touch wood, seems fine. Ran her for 45 minutes in garage on Saturday and went for a wander yesterday evening on a small road overlooking Plymouth Sound.
Pete
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