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28th May 2021, 17:56
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#1 |
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Regular poster
MGZT-T Join Date: Feb 2016
Location: SE London
Posts: 34
Thanks: 1
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Running cool - new thermostat?
After putting up with poor mpg figures for longer than I ought to have I’ve finally fitted a head up display and it shows my engine temp is rarely peaking above 82 degrees. I assume this means it’s stuck open and needs replacing?
Two questions: first is this likely to be damaging the engine and second what’s the best replacement unit? The thermostat has only been in for 5 years and not many miles so surprised it’s failed so soon. Cheers Sent from my iPhone using Tapatalk |
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28th May 2021, 19:12
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#2 |
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This is my second home
ZT260 #243 (resting) Join Date: May 2010
Location: Prestonpans
Posts: 22,462
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Thanked 4,624 Times in 3,358 Posts
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Could have saved the money and just brought the temperature up on the diagnostics display.
https://www.the75andztclub.co.uk/for...ad.php?t=55585 |
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28th May 2021, 19:17
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#3 | |
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Posted a thing or two
75 cdti 2004 contemporary Join Date: Apr 2008
Location: meath
Posts: 1,551
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Quote:
Just get one of the inline ones for less than a tenner. |
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28th May 2021, 19:32
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#4 |
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This is my second home
R75 Saloon. Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
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  Thermostat failure won't be related to miles driven though.--More likely to be age related.---  With the engine temperature you quoted: no engine damage.--Unless it runs generally very low.---You would need to run the dash temperature readout to see if that was the case. Last edited by COLVERT; 28th May 2021 at 19:41.. |
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28th May 2021, 19:37
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#5 |
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Posted a thing or two
V6 2ltr auto in copperleaf +CDTI Auto in Royal Blue on loan to Son Join Date: Jul 2010
Location: Tewkesbury, Gloucestershire
Posts: 1,707
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Profile says 2.5 V6 ZTT.
My V6 2.0 runs about 86 degrees, but I have got the Kaiser metal thermostat housing fitted.
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29th May 2021, 07:34
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#6 | |
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Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,344
Thanks: 1,587
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Quote:
As Steve and Jon have said, you need to verify your new fancy gizmo by activating the instrument pack diagnostic display of your coolant temperature. It's very unusual for a KV6 thermostat to fail in the way you suspect. Also, how are you measuring your fuel consumption? Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
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