STEADS Posted December 7, 2013 Share Posted December 7, 2013 Does any one know if this is a common problem with the thermostat housing leaking on a 2009 1.8 tdci noticed a coolant leak last week whilst changing the fuel filter so got around to doing it this morning thinking it's just the thermostat gasket as temp is normal . Takes it apart no gasket just a rubber seal around thermostat didn't take it out cos part I was supplied had different gaskets and seals so put a touch of hylomar around edge of the thermostat cap . Appears to still be dripping and noticed on eBay they sell quite a few of these so just wondering if it's the housing that attaches to the block and not coolant coming from the seal around the thermostat cap and housing .any one else come across this. Quote Link to comment Share on other sites More sharing options...
Stoney871 Posted December 7, 2013 Share Posted December 7, 2013 The seal on the thermostat is an item that must be replaced if the thermostat or housing is removed. It hardens over time and will not seat properly a second time. Thermostat housings can become brittle with time ( i believe that they are plastic ones?) and can have a habit of going. Quote Link to comment Share on other sites More sharing options...
Jockstar Posted December 31, 2013 Share Posted December 31, 2013 I have a 2007 focus tdci and I noticed my coolant level dropping. On closer inspection I noticed pink crystallised coolant towards the front of the engine bay. It turned out to be the thermostat housing. My mechanic said that there were two parts listed, one at just under £100 and another part which was considerably cheaper. We went down the cheaper route and the leak was fixed. He informed me that this was a common problem and he'd seen it happen quite often on transits with the1.8 tdci engine. Quote Link to comment Share on other sites More sharing options...
STEADS Posted January 1, 2014 Author Share Posted January 1, 2014 It's deformed the housing leaking and as always I have the car where there are two different ones for it had a look at the eBay ones they all differ to mine and I refuse to pay extortionate prices likes fords want so will trawl the motor factors for one. Quote Link to comment Share on other sites More sharing options...
Jockstar Posted January 1, 2014 Share Posted January 1, 2014 I'm sure the part I needed was less than £30. I'll try and get more information when I get back up to Scotland. Quote Link to comment Share on other sites More sharing options...
STEADS Posted January 1, 2014 Author Share Posted January 1, 2014 Difference I can see on mine is the angle of the small outlet/inlet pipe I imagine it does the same job but if I put my hose on it might kink it at the moment the leak is only minor and I keep an eye on the water level and temp so gives me time to source one at the right price don't mind paying for owt but refuse to be ripped off and taken for a mug . Quote Link to comment Share on other sites More sharing options...
Jockstar Posted January 1, 2014 Share Posted January 1, 2014 Yeah better to get the right part. My leak was like yours, fairly easy to manage. Quote Link to comment Share on other sites More sharing options...
Jordlr Posted January 8, 2015 Share Posted January 8, 2015 Difference I can see on mine is the angle of the small outlet/inlet pipe I imagine it does the same job but if I put my hose on it might kink it at the moment the leak is only minor and I keep an eye on the water level and temp so gives me time to source one at the right price don't mind paying for owt but refuse to be ripped off and taken for a mug .image.jpg My coolant is leaking from exactly the same place as yours mate. Did you managed to find out what part you need and replace it? Mines leaking where it bolts to the engine (where the gasket is i imagine) and from the bolts as youve pictured. If youve sorted yours can you let me know the parts you used and where you got them from please? Cheers, Jordan Quote Link to comment Share on other sites More sharing options...
Paulharry Posted May 2, 2016 Share Posted May 2, 2016 hi all 2/5/2016 ive fixed mine with the £14.99 one off eBay I've done 3000 miles up to now with no leaks its the full housing with a stat already fitted inside I tried to fix it with a new oring(£3) and stat(£23)from ford but it still leaked the same stat oring and thermostat housing from ford will cost you well over £150 it was easy to fit as well Quote Link to comment Share on other sites More sharing options...
james1089 Posted May 2, 2016 Share Posted May 2, 2016 the cheap ones don't last long maybe 1 year if your lucky, still not bad for the price. Quote Link to comment Share on other sites More sharing options...
ForTim Posted December 17, 2016 Share Posted December 17, 2016 I also have a leak on housing. It seems to be on join and around bolts, so I at first was thinking of replacing just a gasket or whatever seals it. But after reading this, it seems better to replace complete housing. I'm still worried how long aftermarket part will last. Bellow 5 years would be bad, 1 year is awful. I see it requires torque wrench, but what is the exact optimal Nm? On my previous car Escort, I was able to easily replace thermostat myself without housing. I don't know why replacement is so complicated on new engines. Quote Link to comment Share on other sites More sharing options...
stef123 Posted December 18, 2016 Share Posted December 18, 2016 The last 1.8tdci thermostat I replaced cost about 18 quid from ford with the gasket IIRC. Easy enough to change but unfortunately they gave me the wrong gasket so I reused the old one with no problems a couple of years on now. Quote Link to comment Share on other sites More sharing options...
Tdci-Peter Posted December 18, 2016 Share Posted December 18, 2016 6 hours ago, ForTim said: coolant temperature is low, 62c. Most advices are to change thermostat. So I can buy a thermostat kit. I hope I can save coolant at least. I see it requires torque wrench, but what is the exact optimal Nm? From Haynes, Thermostat housing nut/bolt torque = 23nm. It is really quite easy on the 1.8. Just siphon or drain out enough coolant to get the level below the housing. If topping up, use the correct Ford (OAT) pink antifreeze. Have a good look at the housing. If cracked or distorted it will need replacing, otherwise just fit a new gasket. A trace of plumbing sealant like Hawk White would cure a weeping gasket. The only difference from older engines is that the housing is plastic, so does age. Quote Link to comment Share on other sites More sharing options...
ForTim Posted December 18, 2016 Share Posted December 18, 2016 Thanks. Sorry, could you please help some more: 'gasket' is a rubber 3-4 cm in diameter that connects lower part of housing to the engine? Makes sense to replace. Good if it comes with thermostat. What's between lower and upper part of existing housing? Also gasket, some seal? Can it be bought and replaced? When thermostat only is replaced, do we need to split lower and upper part of housing? I don't know how to change it otherwise. (I'm asking because coolant doesn't seem to leak now, maybe red marks are from before). Quote Link to comment Share on other sites More sharing options...
Tdci-Peter Posted December 20, 2016 Share Posted December 20, 2016 On 18/12/2016 at 8:16 PM, ForTim said: When thermostat only is replaced, do we need to split lower and upper part of housing? When I did mine, I only had to remove one (upper) part of the housing, and the thermostat pulled out quite easily. Operating temperature is usually marked on the thermostat, and can vary, but mine is set to open at 80C. Quote Link to comment Share on other sites More sharing options...
beer&fords Posted March 21, 2017 Share Posted March 21, 2017 Bought a replacement off eBay for £11.80 mine kept seeping from the housing changed the thermos stat and seal (x different seal) then tried RTV sealant aswell still dripping in the end bought this..... http://www.ebay.co.uk/itm/152311399128?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT Quote Link to comment Share on other sites More sharing options...
beer&fords Posted March 21, 2017 Share Posted March 21, 2017 Or euro car parts do this which works out bit more expensive.... http://www.eurocarparts.com/basket Quote Link to comment Share on other sites More sharing options...
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