mick85 Posted December 17, 2013 Share Posted December 17, 2013 Right we'll thermostat not opening then fan cutting an running faster stop car overheating are u sure all other pipe hot an good hot air inside car u goin have replace temp sensor cheapest thing an if that don't work maybe PCM upgrade then followed by rad the rad last cause I say that most expensive did u do flush with thermo still in car Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 17, 2013 Author Share Posted December 17, 2013 Yeah good hot air in car, I'll do sensor when I get paid, I rang Ford and a PCM upgrade is £90 so was gonna do that as a last resort as found a brand new radiator on e-bay for £40 and yeah left thermostat in when did the flush. Which other pipes should be hot? Quote Link to comment Share on other sites More sharing options...
mick85 Posted December 17, 2013 Share Posted December 17, 2013 Ok u should had that thermostat out doing that flush but its really weird like it should open regardless when coolant hit temperature like if u driving longer then half hour u expect every coolant hose be hot an hot air in car means water pump circulating hot water from engine into matrix is both coolant pipes at bulkhead hot Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 17, 2013 Author Share Posted December 17, 2013 I'm not sure which pipes u mean? Quote Link to comment Share on other sites More sharing options...
mick85 Posted December 17, 2013 Share Posted December 17, 2013 Two pipe at back the engine on bulkhead follow pipes coming out of inside car from heater matrix Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 17, 2013 Author Share Posted December 17, 2013 Ok I'll have a check in the morning as cars locked up the the garage now, cheers for the info I'll let u know the outcome Quote Link to comment Share on other sites More sharing options...
artscot79 Posted December 17, 2013 Share Posted December 17, 2013 even after an hour the bottom pipe can still not be hot simply put its say 5 degrees outside add in the wind chill at say 60mph youre looking at 2 degrees thats whats flowing through the rad the thermostat will stay closed and bypass the coolant round the head so the engine heats up quicker and stays at a constant temperature once the coolant gets hot enough the rad will open and the coolant will flow through the rad but as its pretty cold air flowing through it will start to over cool so the thermostat will close again which can be seen on the gauge ie up at 90 then drops a bit then up again and again the coolant flows round the head to the expansion tank thats how the system works you cant test it by driving unless its say 15 degrees outside which its not so the only way to check the bottom pipe and thermostat opening is simple leave the car running sitting at idle check the expansion tank look for coolant flowing into it via the bypass it will get warm after a while the top hose should get warm then hot when this happens and its hot check the expansion again this will also be warm/hot give it 10 mins and now feel the bottom hose if its cold carefully incase the fan comes on touch the top of the rad if its hot then the thermostat is opening as it should if the bottom hose gats hot all is fine with the thermostat and its likely the head temp sensor Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 17, 2013 Author Share Posted December 17, 2013 Ok thanks for the info and just to let u know I haven't been able to go 60 mph since it started overheating I can bearly get to 45mph before the temps in the red Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 28, 2013 Author Share Posted December 28, 2013 Right just a quick update, changed CHT sensor and still saying overheating😡😡 I guess next step is the PCM update by Ford 💸💸 Quote Link to comment Share on other sites More sharing options...
mick85 Posted December 28, 2013 Share Posted December 28, 2013 So did every pipe get hot an fan cut in if u left it idle or revved engine to get car good an hot from a stand still Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 28, 2013 Author Share Posted December 28, 2013 Yes, well bottom hose got warm I wouldn't say hot, but all others pretty hot Quote Link to comment Share on other sites More sharing options...
Steve Tnl Posted December 28, 2013 Share Posted December 28, 2013 Your radiator is blocked. Take it out and put a hose in one in the large input, it should run freely out of the other bottom large output, if not, that's the problem. Also check that you have all the little zig zag bits in between the tubes that carry the water through the radiator, if they are gone it will not cool the water. For whatever reason the water is not being cooled, the faster you go, the more it will overheat. Your ecu is protecting the engine from you trying to cook it so is restricting your speed. Simply flushing a rad in situ is often not enough and will not unblock it. Quote Link to comment Share on other sites More sharing options...
mick85 Posted December 28, 2013 Share Posted December 28, 2013 Including small pipe from coolant bottle to rad an both pipe going into matrix so u replaced thermostat water pump coolant temp sensor every fan cuts in an out an every pipe gettin hot now every pipe on coolant system Quote Link to comment Share on other sites More sharing options...
STEADS Posted December 29, 2013 Share Posted December 29, 2013 Who or where did you get the the water pump changed was the system bled properly . Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 29, 2013 Author Share Posted December 29, 2013 I got the pump done at a guys garage that a bloke at work recommended, I'm not sure if bled properly as I didn't stay there when the work was being done. I didn't think the focus had any bleed screws/valves?? Quote Link to comment Share on other sites More sharing options...
mick85 Posted December 29, 2013 Share Posted December 29, 2013 They don't have bleed screw but if all pipes hot an fan cutting in an out should be ok Quote Link to comment Share on other sites More sharing options...
martyntdci Posted December 29, 2013 Share Posted December 29, 2013 was just going suggest air block..... Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 29, 2013 Author Share Posted December 29, 2013 I thought air lock at first but since then I've drained the coolant, flushed the system and re-filled slowly abit at a time while squeezing all the pipes Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 30, 2013 Author Share Posted December 30, 2013 Ok this completely slipped my mind and I've just remembered now, when I had the water pump done when I picked the car up the bloke said that when he went to take the slack of the drive belt the tensioner was really loose and it wouldn't tighten up properly after he'd finished so he said he'd put some lock tight on it but advised me to replace the tensioner, in all the stress of figuring out the overheating I completely forgot, it's a long shot but could a faulty belt tensioner be causing the problem?? Quote Link to comment Share on other sites More sharing options...
artscot79 Posted December 30, 2013 Share Posted December 30, 2013 if the bekts loose it will be slipping and so the pump wont be getting turned properly if at all ide get that tensioner sorted first Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 30, 2013 Author Share Posted December 30, 2013 Yh I'm gonna sort that tomorrow, it's not been squealing tho, could it be slipping but not making a noise?? Quote Link to comment Share on other sites More sharing options...
mick85 Posted December 30, 2013 Share Posted December 30, 2013 Could be that but u be expecting battery light alternator not be charging either if an power steering be heavier if belt loose Quote Link to comment Share on other sites More sharing options...
Danny boi Posted December 30, 2013 Author Share Posted December 30, 2013 Well it needs replacing regardless so I'll do that in the morning but as you say I got no battery light and power steering fine Quote Link to comment Share on other sites More sharing options...
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