jims13 6 Posted December 13, 2007 Report Share Posted December 13, 2007 righty ho, the problem is as ive said above, ive done the following so far.replaced thermostat, flushed and back flushed radiator till it ran clear, flushed and backflushed heater matrix.ive also replaced the heater resistor, under the dash.im guessing because it blows hot at first , its not the resistor...i have also just noticed while waiting for the car to get upto temp, that the botttom pipe off the rad stays cold to the hand , whilst the top is el scorchio... even after the fan kicks in which it does as it should , the bottom hose stays cold to the hand, the pipes in and out ofthe the heater matrix , are also hot , and everything seems to recirc as it should...so im guessing the bottom hose is the potential problem/cure , but im now no clearer to solving my problem as why the heater blows hot then goes cold.HELP, as i dont want another winter with no heater. Link to post Share on other sites
philbatesvr6 0 Posted December 13, 2007 Report Share Posted December 13, 2007 daft question but have you put the thermostat back in the rite way round ? Link to post Share on other sites
thegoth 5 Posted December 13, 2007 Report Share Posted December 13, 2007 daft question 2, did you have the heater set to hot whilst flushing / refilling? Link to post Share on other sites
jims13 6 Posted December 13, 2007 Author Report Share Posted December 13, 2007 er, i wernt aware it would fit the wrong way round, ill guess ill strip it down again tommorrow and have a look... but the fan does kick in ...and yep i did. Link to post Share on other sites
gav_113 0 Posted December 16, 2007 Report Share Posted December 16, 2007 no way ive got the same prob?? i leave the car ticking over for like a couple of mins then the heater goes cold?? dont understand it? i have replaced the thermostat, think it was the right way rnd?? the only thing ive got missing on my car is the electric aux waterpump.. would that make any difference?? its doing my head in coz its freezin.. when driving the car hardly gets to 70 degrees??? Link to post Share on other sites
philbatesvr6 0 Posted December 17, 2007 Report Share Posted December 17, 2007 i think the electirc water pump is a MUST have item on the vr6 it stops the bolck cracking when the engine is turned off , get it fitted back on ! Link to post Share on other sites
gav_113 0 Posted December 17, 2007 Report Share Posted December 17, 2007 i think the electirc water pump is a MUST have item on the vr6 it stops the bolck cracking when the engine is turned off ' date=' get it fitted back on ![/quote']i have fitted one and it doesnt work.. something wrong wit the wiring?? there is no power to it?so i took it bk of again,, Link to post Share on other sites
jims13 6 Posted December 17, 2007 Author Report Share Posted December 17, 2007 no my electy pump works, and besides it would bear no resemblance to the heater.. im thinking now its something to do with the flaps behind the box has any got a diagram of the heater setup including the behind the dash part. Link to post Share on other sites
gav_113 0 Posted December 18, 2007 Report Share Posted December 18, 2007 my temp doesnt get very hot, i drive to work this morn 10 miles and the temp didnt even get over the bottom mark.. it was 2 degrees outside.. the heaters were hardly warm?? dont understand it? Link to post Share on other sites
Phat VR6 3 Posted December 18, 2007 Report Share Posted December 18, 2007 Nor me mate lol. Mine used to get upto temp after seconds, compared with my 1.4 mk3, Most big engine cars do heat up quickly. Overheating alot easyer to diganos atleast your not doing any damage but it is realy confusing and problay killing your fuel.Only thing i can think of is blocked heater matrixs and duff temp sender.If you pop the bonnit do the hoses feel as hot as they should be???? Link to post Share on other sites
Phat VR6 3 Posted December 18, 2007 Report Share Posted December 18, 2007 righty ho' date=' the problem is as ive said above, ive done the following so far.replaced thermostat, flushed and back flushed radiator till it ran clear, flushed and backflushed heater matrix.ive also replaced the heater resistor, under the dash.im guessing because it blows hot at first , its not the resistor...i have also just noticed while waiting for the car to get upto temp, that the botttom pipe off the rad stays cold to the hand , whilst the top is el scorchio... even after the fan kicks in which it does as it should , the bottom hose stays cold to the hand, the pipes in and out ofthe the heater matrix , are also hot , and everything seems to recirc as it should...so im guessing the bottom hose is the potential problem/cure , but im now no clearer to solving my problem as why the heater blows hot then goes cold.HELP, as i dont want another winter with no heater.[/quote']One of the hoses coming out of the rad should be cooler as its been cooled by the rad.Do any of the heater controls feel like theres no resistence anymore. Could be a broken cable or somthink like that Link to post Share on other sites
4mobora 0 Posted December 18, 2007 Report Share Posted December 18, 2007 do these have the matrix bypass valve or likes of like the mk 2 recall years ago?? could this be it? Link to post Share on other sites
gav_113 0 Posted December 18, 2007 Report Share Posted December 18, 2007 its like when we used to take the thermostats out of our RS turbos to could engine temps down, the engine runs cooler.. and in the winter we would put the stat bk in.. im going to change the stat again i think!! Link to post Share on other sites
gav_113 0 Posted December 27, 2007 Report Share Posted December 27, 2007 yesh, yesh i have heat at last!! replaced the thermostat again £11 quid from partco, done the job.. Link to post Share on other sites
jims13 6 Posted December 28, 2007 Author Report Share Posted December 28, 2007 just found out my rad is blocked solid, flushed and reflushed...still solid, so a new rad for me...euro car parts here i come. Link to post Share on other sites
leespeza123 0 Posted February 28, 2008 Report Share Posted February 28, 2008 hi there it might be the main water pump Link to post Share on other sites
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