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Old 16th July 2021, 22:02   #11
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Originally Posted by Thunderbolt View Post
Having bought, but not yet fitted, a metal kaiser stat kit from DMGRS, please can you tell me what temp the kaiser kit will run at?
Take the thermostat out and have a look what is stamped on it temperature wise. Then change it for the correct opening temperature thermostat. Easy really.
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Old 16th July 2021, 23:04   #12
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I have been in contact with x-part myself who after being informed of other members of the club being affected by more than one parts supplier selling thermostats that appear to all be operating at the same temperature. The adviser has stated they will investigate the issue with the manufacturer.
They stated that it is the same supplier they have had for years so.. from my point of view, it could simply be that the wrong stat is being fitted and has gone un-noticed. A straight forward simple issue that should be fairly straight forward to correct I would have thought.

I myself have ordered a new thermostat from summit garage, to replace the unit I fitted in november that has always opened too early.

Due to the possibility of an issue with the thermostat opening too early on the new part despite coming from summit garage (main dealer), due to the possibility of an issue at manufacturer level, I will be testing the thermostat opening temperature tomorrow with the use of a digital temperature probe and if possible, taking photographs showing the temperature of the water and if possible the opening of the thermostat.

The new thermostat sourced from summit garage, obtained via x-part came in a box, with the saic/roewe and MG branding with other information and with an address in China. (Quite honestly think the sticker was applied at dealer but parts inside are from the uk

It's not a particularly difficult task changing the thermostat on the V6 but it is pretty soul destroying after spending a fair amount of money on parts and then doing the work to find the part is faulty.. even more so when you begin to see other people also having the exact same issue.

And while a work around such as a second thermostat in the top hose could well be a solution. Surely the correct steps to take is to look into where the issue is arising and see if it can be corrected before making a modification/work around. As it's important to remember that the original thermostat fitted in the V of the block can still leak or break up with age or the thermostat eventually jamming shut causing a flow restriction so later down the line.. still requiring a replacement. Then, you'll be left with the same situation, paying good money for a thermostat that you know isn't likely to work as it is intended.
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Old 17th July 2021, 07:34   #13
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Originally Posted by biffa75 View Post
I have been in contact with x-part myself who after being informed of other members of the club being affected by more than one parts supplier selling thermostats that appear to all be operating at the same temperature. The adviser has stated they will investigate the issue with the manufacturer.
They stated that it is the same supplier they have had for years so.. from my point of view, it could simply be that the wrong stat is being fitted and has gone un-noticed. A straight forward simple issue that should be fairly straight forward to correct I would have thought.

I myself have ordered a new thermostat from summit garage, to replace the unit I fitted in november that has always opened too early.

Due to the possibility of an issue with the thermostat opening too early on the new part despite coming from summit garage (main dealer), due to the possibility of an issue at manufacturer level, I will be testing the thermostat opening temperature tomorrow with the use of a digital temperature probe and if possible, taking photographs showing the temperature of the water and if possible the opening of the thermostat.

The new thermostat sourced from summit garage, obtained via x-part came in a box, with the saic/roewe and MG branding with other information and with an address in China. (Quite honestly think the sticker was applied at dealer but parts inside are from the uk

It's not a particularly difficult task changing the thermostat on the V6 but it is pretty soul destroying after spending a fair amount of money on parts and then doing the work to find the part is faulty.. even more so when you begin to see other people also having the exact same issue.

And while a work around such as a second thermostat in the top hose could well be a solution. Surely the correct steps to take is to look into where the issue is arising and see if it can be corrected before making a modification/work around. As it's important to remember that the original thermostat fitted in the V of the block can still leak or break up with age or the thermostat eventually jamming shut causing a flow restriction so later down the line.. still requiring a replacement. Then, you'll be left with the same situation, paying good money for a thermostat that you know isn't likely to work as it is intended.

Don't forget to suspend the stat with a piece of string or wire in the water to keep it clear of contacting the pan to prevent metal to metal heat transfer.
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Old 17th July 2021, 09:11   #14
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Originally Posted by Ducati750cc View Post
Don't forget to suspend the stat with a piece of string or wire in the water to keep it clear of contacting the pan to prevent metal to metal heat transfer.
There will be no metal to metal contact in the pan of water as it's cased inside the plastic housing, even so you would still need to suspend the housing as you do not want the plastic housing touching the base of the large deep pan which will be needed as the housing is not small.

Good luck and please let us know the out come.
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Old 17th July 2021, 11:41   #15
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Not to worry folks, I have had a different idea. Instead of using a pan I'll block three of the four ports off, leaving the port with the sprung section of the thermostat visible. I will then be adding the water to the stat housing this way. The water temp will be maintained for a few seconds before adding the water and allowing it to sit inside the housing with the temp probe and watching for the spring beginning to move indicating that the stat is operating and at what temp. If they weren't so expensive I would have split it open and tested the thermostat that way but I aren't in a position to buy two at £40 each just for the housing. I will report back possibly this evening.
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Old 17th July 2021, 22:36   #16
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Quick report back.

So, testing first: without opening the thermostat this did prove difficult but measuring out 130ml of hot water with the temperature maintain at 83 to 83.4°c showed the springs around the thermostat shaft didn't appear to move a great deal if at all.

At 90°c, we noticed the springs begin to compress slightly.

At 87°c the springs also began to move slowly. As said, doing this with the thermostat housing still intact was difficult. So it is far far from an exact measurement but I felt confident in the new thermostat.

I set about removing the top half of the engine ancillaries and there was a marked difference in the thermostats and thermostat housings themselves.

I would post pictures but aren't able to at the present time.

The bottom of the thermostat showed two completely different thermostat designs.

The removed thermostat housing had no etching of sub assembly number or the 82°c etching that many people mention. It was completely blank.

On the underside of the high frequency welded joint on the new part there was what appeared to be a sub assembly part number possibly, the one removed from the car didn't have anything etched or stamped.

There was very clearly a difference between the two thermostat housing and thermostat design.

The car is almost back together however I had to down tools at 10pm. I'm hoping to finish things off tomorrow. I'm feeling hopeful that the new thermostat will be totally fine.
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Old 2nd August 2021, 13:24   #17
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Originally Posted by bl52krz View Post
Take the thermostat out and have a look what is stamped on it temperature wise. Then change it for the correct opening temperature thermostat. Easy really.
Even easier if you sold a kit with the right one fitted, wouldn't it?
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Old 12th August 2021, 12:59   #18
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I have posted in a different thread regarding this issue.

I bought a thermostat kit from DMGRS a couple of months back and after fitting, the car took an age to get up to the minimum 75° temp in our recent warm weather (over 6 miles) and the highest temps on the motorway I was getting was 78°. The stat was opening way too early around 74° so clearly faulty or an 78° stat was fitted in housing by mistake?

A replacement was sent from DMGRS with no issues, of which they told me was from a new OE supplier. It has the original part number stamped into the housing along with the stat rating of 82°. I fitted this last weekend and now my car is reaching normal operating temp quite quickly (3 miles ish) and on the ipk display showing 82° to 84° on motorway. I understand this is still not the 88° minimum the car was designed to run with however, I am assuming that at these temps, the 82° stat is working just fine.

The guys at DMGRS are always helpful and do not hesitate to replace faulty parts so will continue to receive my custom even if their suppliers sometimes let them down with cases like this.
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Old 12th August 2021, 16:16   #19
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It has the original part number stamped into the housing along with the stat rating of 82°.
They all have that Tom, whoever supplies them, but some have it blanked out. It doesn't mean that the thermostat inside is rated at 82˚.

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Old 12th August 2021, 16:53   #20
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They all have that Tom, whoever supplies them, but some have it blanked out. It doesn't mean that the thermostat inside is rated at 82˚.

Simon
OK but if its running between 82° and 84° steady on the motorway then I think its safe to say it has an 82° stat and is working as it should at that temperature no?
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