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2011 +4 Overheating - But Temp Indicating Low #541993
10/11/18 11:21 AM
10/11/18 11:21 AM
Joined: Jan 2010
Posts: 844
Lampeter, Wales
Jon G4LJW Online content OP
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Jon G4LJW  Online Content OP
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Joined: Jan 2010
Posts: 844
Lampeter, Wales
I just got back from doing only 10 miles, and was surprised to see steam coming out of the bonnet.

The temp gauge was registering something like 80 I think. Am waiting for things to cool before checking coolant level, but I don't understand the temperature reading.

Any thoughts?

Thanks.

Re: 2011 +4 Overheating - But Temp Indicating Low [Re: Jon G4LJW] #541995
10/11/18 11:24 AM
10/11/18 11:24 AM
Joined: Jun 2015
Posts: 636
North Somerset, UK
Deejay Offline
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North Somerset, UK
You didn’t happen to splash through a puddle near home? The CAT gets extremely hot under the wing, so if it got wet might very well issue lots of steam from under bonnet?


Doug

2011 +4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
Re: 2011 +4 Overheating - But Temp Indicating Low [Re: Deejay] #541997
10/11/18 11:27 AM
10/11/18 11:27 AM
Joined: Jan 2010
Posts: 844
Lampeter, Wales
Jon G4LJW Online content OP
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Jon G4LJW  Online Content OP
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Lampeter, Wales
Originally Posted By Deejay
You didn’t happen to splash through a puddle near home? The CAT gets extremely hot under the wing, so if it got wet might very well issue lots of steam from under bonnet?


Ah - very interesting - lots of rain earlier today, and I went through several very large puddles!

Would that also affect the temp gauge?

Re: 2011 +4 Overheating - But Temp Indicating Low [Re: Jon G4LJW] #542005
10/11/18 12:19 PM
10/11/18 12:19 PM
Joined: Dec 2009
Posts: 25,134
Devonshire
+8Rich Offline
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Devonshire
Jon, the achiles heel on the newer models is the plastic top and bottomed alloy radiators - with the car flexing it soon finds a weak spot. Most replace these with an all aluminium one. With luck it'll be a loose hose.


Regards Richard

1999 Indigo Blue +8
2009 4/4 Sport Green prev
1994 Connaught Green +8 prev





Re: 2011 +4 Overheating - But Temp Indicating Low [Re: +8Rich] #542013
10/11/18 12:29 PM
10/11/18 12:29 PM
Joined: Jan 2010
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Lampeter, Wales
Jon G4LJW Online content OP
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Lampeter, Wales
Thanks Rich - I'll look out for that.


Originally Posted By +8Rich
Jon, the achiles heel on the newer models is the plastic top and bottomed alloy radiators - with the car flexing it soon finds a weak spot. Most replace these with an all aluminium one. With luck it'll be a loose hose.

Re: 2011 +4 Overheating - But Temp Indicating Low [Re: Jon G4LJW] #542046
10/11/18 03:24 PM
10/11/18 03:24 PM
Joined: Jan 2010
Posts: 844
Lampeter, Wales
Jon G4LJW Online content OP
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Lampeter, Wales
I don't think there's anything loose.

I took the car around the block - just 1.5 miles - and the engine seems very hot again.

Coolant level looks good though.

Re: 2011 +4 Overheating - But Temp Indicating Low [Re: Jon G4LJW] #542047
10/11/18 03:25 PM
10/11/18 03:25 PM
Joined: Jul 2014
Posts: 575
Cornwall
griffo Offline
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Cornwall
I would endorse what deejay says. It's almost certainly that. The cat gets very hot (it has to to work) which does not affect coolant temp gauge reading. It's difficult at this time of the year I know but if you can avoid splashing a hot catalyst with ice cold puddles it's a good idea. They have been known to crack and fail on Morgans because of this. I insulate my cat with heat shielding material which helps.

Re: 2011 +4 Overheating - But Temp Indicating Low [Re: griffo] #542048
10/11/18 03:33 PM
10/11/18 03:33 PM
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Posts: 844
Lampeter, Wales
Jon G4LJW Online content OP
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Lampeter, Wales
Thanks for that - it was impossible to drive around some of the big puddles today!

Originally Posted By griffo
I would endorse what deejay says. It's almost certainly that. The cat gets very hot (it has to to work) which does not affect coolant temp gauge reading. It's difficult at this time of the year I know but if you can avoid splashing a hot catalyst with ice cold puddles it's a good idea. They have been known to crack and fail on Morgans because of this. I insulate my cat with heat shielding material which helps.

Re: 2011 +4 Overheating - But Temp Indicating Low [Re: Jon G4LJW] #542052
10/11/18 03:49 PM
10/11/18 03:49 PM
Joined: Apr 2014
Posts: 4,674
Llanelli
Ray Offline
Part of the Furniture
Ray  Offline
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Joined: Apr 2014
Posts: 4,674
Llanelli
Originally Posted By Jon G4LJW
I don't think there's anything loose.

I took the car around the block - just 1.5 miles - and the engine seems very hot again.

Coolant level looks good though.
. Check the fan is working. I once managed to knock a spade connection off going through a flood.


.+8 Now gone for a 1800 4/4. Duratec in bright yellow.
Re: 2011 +4 Overheating - But Temp Indicating Low [Re: Jon G4LJW] #542054
10/11/18 03:59 PM
10/11/18 03:59 PM
Joined: Dec 2011
Posts: 302
South West France
C
CBY Offline
Learner Plates Off!
CBY  Offline
Learner Plates Off!
C

Joined: Dec 2011
Posts: 302
South West France
Check the temperature of the lower hose (output) of the radiator. If the temperature is relativity warm vs the upper hose: thermostat problem.


Regards
2005 PLUS 4
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