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MG MGF Technical - Fluctuating water temp
My vehicle has just had all it's fluids replaced and bled in accordance with the repair manual. I have just returned from a 200km trip where the water temp was showing just below half for many kilometers but when I went through some very twisty bits of road the gauge droped down to the first markings and slowley returned to the normal position. Is this a sign of a faulty thermostat or a system requiring further bleeding. |
Andrew Regens |
I would guess you need to do some more bleeding off the coolant circuit. Johan |
Johan Slagter |
Nope, this is almost definitly sticky thermostat. |
Will Munns |
Would you believe neither !. Puled off the leads for the sender unit cleaned up the pins and hey presto it works . Just a dirty connection my cheapest repair for the year. Thanks though for the sugestions. |
Andrew Regens |
Mine started behaving strangely yesterday: Temperature was rising slower than usual, without reaching its usual reading unless I was revving. Sticky thermostat, I assume. I'll be taking it apart this evening. One of those rare nice summer days in Norway and I am spending it in the garage... |
Jon |
New thermostat fitted. This time a Tridon 8620 701882 82deg item, intended for a Fiat or a Peugeot according to the writing on the box. Diameter slightly too large, so i had to do a litte filing to make it fit. A 3mm hole was also drilled in it (the old one that worked for 3 years had a 2mm hole). Works fine - warm-up time slightly longer but then less thermal shock when engine reaches working temp and the 'stat opens. |
Jon |
>> Mine started behaving strangely yesterday: Temperature was rising slower than usual, without reaching its usual reading unless I was revving. << Mine's been doing the same recently too. Might just check the electrical connection to the loom plug as Andrew suggests - but plan a TF PRT thermostat upgrade in the near future (when I can get hold of one!!!) |
Rob Bell |
In my case it was the thermostat that was faulty. I do not think there is a connection between engine revs and electrical readings. What exactly is a TF PRT upgrade? A thermostat located in a remote housing similar to the Land Rover Freelander converison? I asked my local dealer about whether such an upgrade is available for my 'F but they did not know any. |
Jon |
Exactly the same as the LR thermostat (ask for new TF pipework) |
Will Munns |
As Dave found when he came to source the PRT, MG dealers can't currently source them, although the part numbers do exist... See http://www.mgf.ultimatemg.com/hgf_pages/cooling_system_modifications.htm Probably easier to obtain one from the UK salvaged from a crashed car (there is currently an ad on eBay for a complete '04 TF transaxle which shows the PRT fitted- see the 'Heat Sheild' (sic) thread. |
Rob Bell |
>>What exactly is a TF PRT upgrade? If anyone missed the article in this month's Safety Fast, I can email it to them. That reminds me Rob, we must try to get a fuller version (i.e. more pics) up on the www.mgfregister.org site. I'll email you all the latest newsletter articles and pics. More work for you - sorry! |
Dave Livingstone |
Dave - I'd sure be very grateful to learn more about the remote thermostat conversion. |
Jon |
Email on its way Jon - hope you find it useful. Dave |
Dave Livingstone |
Thanks Dave! How much did the conversion cost you? In parts, that is. I assume the job took something like two or three hours? |
Jon |
Another email for you :-) |
Dave Livingstone |
Will, Are you sure it is the same as all Freelanders? I have a Freelander unit and it has one extra smaller bore outlet over the MG PRT. Rog |
Roger Parker |
nope, not sure at all, so I guess the answer should have been: 'yes, the TF design was pioneered on the Landrover. but the TF pipework will be slightly diffrent due to the engine being in a diffrent place - ask for the new TF pipework' Sorry if I have misled anyone. |
Will Munns |
I wasn't sure either Will, as I have had some bits from an early Freelander as I initially wanted the twin cooling fans. The box of bits includes some hoses and the PRT. I think that there may be scope to use this one by perhaps blocking off the extra outlet, but as you say using the Tf hoses etc. Rog |
Roger Parker |
>> If anyone missed the article in this month's Safety Fast, I can email it to them. That reminds me Rob, we must try to get a fuller version (i.e. more pics) up on the www.mgfregister.org site. I'll email you all the latest newsletter articles and pics. More work for you - sorry! << No problem Dave - I'll get onto this - but it'll be September before I really get time suspect! The detail differences between the LR and the MG PRT are intriguing: why is there a difference? I confess that I was of the same opinion as Will until I saw the photos... |
Rob Bell |
This thread was discussed between 04/07/2004 and 09/07/2004
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