passat 130 tdi cooling system

[billza1967]

I can only guess it's so that if you want to lower them a bit while reversing they both go down? No idea why really, but they all seem to do it.

yeah that makes sense davey just never seen another car do that but cheers thats one thing i can rule out my alarm has been going off willy nilly and the esp light has been coming on so i thought it might have something to do with that cheers bill

[passat>sport]

Have you tried changing the coolent temp sensor?

[billza1967]

Have you tried changing the coolent temp sensor?

yeah mate i changed that and the fuel temp sensor and the maf sensor its a genuine vw maf do you think the new coolant sensor could be duff

[passat>sport]

I doubt it! but who knows.

I'm no good with electrics myself . I leave all that lot to a mate of mine.

[billza1967]

Passat>sport is correct in what he is saying. The VW tdi have a very good design in which the thermostat stays shut (especially in cold weather) for long periods of time. Even if you drive at motorway speed in cold weather like we are having, the radiator will cool that much that the thermostat will just shut again (hence a cold bottom pipe again) because there is no water flow going through it.

I also thought there was a problem at first but soon found out it is very normal on these engines.

By the sounds of it, you do a lot of driving with you being a taxi. If there was something wrong you would surly know about it by now.

thanks for your reply mate i do have a problem i dont know if its related to the cooling system but with the problem im having it seems to point in that direction either the cooling system or some sensor associated with it but it does seem a bit strange( i can drive for hours on end and i do put my foot down a bit )that it doesnt heat the hoses and theres no pressure in the header tank but too be honest its my first vw and the technology in these cars is way out of my league

[billza1967]

I doubt it! but who knows.

I'm no good with electrics myself . I leave all that lot to a mate of mine.

cheers passat>sport knowing my luck it could be duff its just about got me bankrupt(again)this car lol

[Eddie]

The bottom hose and expansion tank being cold are normal ime a taxi driver myself and i did a dover wait & return,on long jobs i check my fluids before i return and my expansion tank was tepid after 306 miles at 85 mph,this is not the prob.It sounds to me like its a electrical connection (dry joint),what i would advise is to disconnect the battery,remove engine cover then spray every connector block with wd 40 do all the sensors on ur rad,temp sensor,maf sensor,everything leave the battery disconeccted for at least 2 hrs (make sure u have ur radio code) then see how it goes

[billza1967]

The bottom hose and expansion tank being cold are normal ime a taxi driver myself and i did a dover wait & return,on long jobs i check my fluids before i return and my expansion tank was tepid after 306 miles at 85 mph,this is not the prob.It sounds to me like its a electrical connection (dry joint),what i would advise is to disconnect the battery,remove engine cover then spray every connector block with wd 40 do all the sensors on ur rad,temp sensor,maf sensor,everything leave the battery disconeccted for at least 2 hrs (make sure u have ur radio code) then see how it goes

dover wait and return you jammy sod lol i was going to change the thermostat at the weekend but i think ill try what you said first if i leave the battery off for a couple of hours will it start ok cheers bill

[chancer]

dover wait and return you jammy sod lol i was going to change the thermostat at the weekend but i think ill try what you said first if i leave the battery off for a couple of hours will it start ok cheers bill

hi guys , bill have you got it sorted yet?, reason i ask ive got a 51 130 and i cant get my heater to work. last week i was coming home after about 45 miles my red light came on telling me to stop, rac said it looked ok,but further on when i put my heater off on a hill it overheated , got home put a new thermostat in ..temp looks ok but now my heater doesnt work ive tried bleeding it 3 times but only got a small heat, i`d be gratefull if anyone could help