evotell Posted April 29, 2014 Share Posted April 29, 2014 1.4 K series. Occasionally the temp gauge climbs right up to the red, sits there for several minutes sometime 5, then drops back to 80 - 90 till it does it again, maybe same day may 3 days. ☹️ Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted April 30, 2014 Share Posted April 30, 2014 What has been done to the cooling system lately ? Could be an airlock in the system. Could be a failing sender unit ...... do you have a thermometer like one of the laser contactless ones so you can measure the temperature of each hose ? I have found the k-series cooling system mod (as per article in LF Sept 2012) to be very effective. Simple and cheap to do. I have a pdf scan of the article if needed. Ian Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted April 30, 2014 Area Representative Share Posted April 30, 2014 For some unknown reason I have found the 1.4 to be even more likely to have an air lock than larger capacity K series engines. Also more difficult to get rid of the airlock in a 1.4. It takes perseverance. Link to comment Share on other sites More sharing options...
Bob L Posted April 30, 2014 Share Posted April 30, 2014 Does sound like an air lock and you don't want these on a K series. I've done the mod on mine (as already recommended)but prior to that I found the bleed 'T' made the whole process much easier. If nothing else, fit one of these if you have not done so already. Then do the mod asap - you won't regret it Link to comment Share on other sites More sharing options...
evotell Posted April 30, 2014 Author Share Posted April 30, 2014 Quoting SM25T: What has been done to the cooling system lately ? Could be an airlock in the system. Could be a failing sender unit ...... do you have a thermometer like one of the laser contactless ones so you can measure the temperature of each hose ? I have found the k-series cooling system mod (as per article in LF Sept 2012) to be very effective. Simple and cheap to do. I have a pdf scan of the article if needed. Ian Nothing, the car has only just been completed, its done 160km. The pdf document would be helpful. terryjohns@live.ca Thanks Ian Edited by - evotell on 30 Apr 2014 14:16:33 Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted April 30, 2014 Share Posted April 30, 2014 Mail sent Terry Link to comment Share on other sites More sharing options...
evotell Posted April 30, 2014 Author Share Posted April 30, 2014 Ok. I raised the front of the car and loosened off one of the hoses, what became apparent very quickly is that all the hoses got hot including the heater hose that goes into the thermostat housing, but the bottom hose stayed cold as did the bottom of the radiator. I am cure the thermostat is not opening. Any suggestions? I have looked the mod document and it makes sense, but I'm not sure this is my present problem. Link to comment Share on other sites More sharing options...
David Brown Posted April 30, 2014 Share Posted April 30, 2014 A bleed T plus a small hole drilled in the thermostat rim should resolve any bleeding problems. Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted April 30, 2014 Share Posted April 30, 2014 Remove the thermostat and put it in a pan of water. Heat the pan and note the opening temp. Changed my 88C to an 82C Also check it is fitted in the housing the right way round ..... with the 'works' facing forward into the engine, not facing the hose. Edited by - SM25T on 30 Apr 2014 16:52:44 Link to comment Share on other sites More sharing options...
evotell Posted April 30, 2014 Author Share Posted April 30, 2014 Quoting David Brown: A bleed T plus a small hole drilled in the thermostat rim should resolve any bleeding problems. Drill a hole where in the housing? Link to comment Share on other sites More sharing options...
revilla Posted April 30, 2014 Share Posted April 30, 2014 !!! NOT IN THE HOUSING !!! It would leak everywhere! Best picture I could find on the internet: http://www.revilla.plus.com/Drilled%20Thermostat.jpg ... but preferably a bit smaller, 2mm or 3mm should do the trick, and make sure that it will be at the top when the thermostat is fitted (it only fits one way around). The hole lets air trapped in the thermostat housing bubble away rather than being stuck and insulating the thermostat, preventing it from opening. If you make it too big, it;s like the thermostat being always a bit open, so prolongs warm up time etc. Edited to say: Sorry for the shouty bold bits, just wanted to make sure you didn't go off drilling holes where they shouldn't be 😬 Edited by - revilla on 30 Apr 2014 17:17:49 Link to comment Share on other sites More sharing options...
Sim Posted April 30, 2014 Share Posted April 30, 2014 Quoting evotell: Ok. I raised the front of the car and loosened off one of the hoses, what became apparent very quickly is that all the hoses got hot including the heater hose that goes into the thermostat housing, but the bottom hose stayed cold as did the bottom of the radiator. Isn't this the classic symptom of an airlock? I've certainly had this and fixed it by re-bleeding - not had to replace the thermostat Simon Link to comment Share on other sites More sharing options...
John Vine Posted April 30, 2014 Share Posted April 30, 2014 Quoting SM25T: Remove the thermostat and put it in a pan of water. Heat the pan and note the opening temp.Just to add one thing -- the 82C (or 88C) is the fully open temperature. The stat will start to open several degrees lower than that. JV Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted April 30, 2014 Share Posted April 30, 2014 when you drill the hole in the flange .... take care to make sure it will be at the top when you fit the thermostat in the housing. It only goes in one way round, and the hole isn't much use if not at the top Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted April 30, 2014 Share Posted April 30, 2014 Phil .... will be in touch when I get home late tonight Link to comment Share on other sites More sharing options...
halstock Posted April 30, 2014 Share Posted April 30, 2014 SM25T, any chance you could email the LF pdf to me too, please? andy at halstock dot com Many thanks, Andy Link to comment Share on other sites More sharing options...
Englishmaninwales Posted April 30, 2014 Share Posted April 30, 2014 Quoting Paul Richards: For some unknown reason I have found the 1.4 to be even more likely to have an air lock than larger capacity K series engines. Also more difficult to get rid of the airlock in a 1.4. It takes perseverance. The early type of 1400 is often difficult with persistent air locks due to its wet liner block construction with a closed top deck, with only tiny bleed holes in the casting. The open deck of the block of the later 1400/1600/1800 with 'damp' liners seems to be easier to fill and free of airlocks. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted April 30, 2014 Share Posted April 30, 2014 Whilst the early 1400 did have a different arrangement all K are wet fully liners, even the Scholar blocks ones albeit with a different install process Link to comment Share on other sites More sharing options...
evotell Posted April 30, 2014 Author Share Posted April 30, 2014 Thanks to all who have contributed. Took it to a pal of mime who has a vacuum coolant filler. I think there was an air lock, but I also think the thermostat was also stuck, taped in several times, and its been fine all day. Proves my theory if it doesn't work get the hammer out 😳 Edited by - evotell on 1 May 2014 13:46:57 Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted May 1, 2014 Share Posted May 1, 2014 Phil ... please mail me again, but include your e.mail address in the body of the message, as neither my phone or PC will 'reply' to a blatmail .... they don't see the address. Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted May 2, 2014 Share Posted May 2, 2014 BTTT for Phil .......... Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted May 2, 2014 Share Posted May 2, 2014 Andy .... mail sent Link to comment Share on other sites More sharing options...
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