Walesy 0 Posted March 25, 2005 hi, i gotta 2.0 8v and its been overheating...i think ive narrowed the problem down to the fan not turning on when it should...as in i think its coming on too late. would this be due to a sensor? i can see what looks like a plug with leads on it going into the bottom of the rad..is this the sensor i need? and how do i go about changing it???also any ideas on the price of a new sensor??...thanks guys. :) :? :( :D Quote Share this post Link to post Share on other sites
Supercharged 2 Posted March 25, 2005 Ok, sounds like the rad thermoswitch is faulty (fan probably one comes on at 110 degrees?) It should have 2 opperating ranges (2 stage fan) They are about £7 for GSF and you'll need to find if you need the flat or the (later) round plug depending on the year of your car. They are located between to top and botom hoses on the rad, take the plug off to check the wiring and which type it is... To change it you take the battery off and use a 30mm (plumbing size) spanner, if your quick to swap them over you shouldn't lose much coolant but mae sure you get the old washer off and the new one goes on, compression washer so just needs to be nipped up (don't overtighten) Quote Share this post Link to post Share on other sites
Walesy 0 Posted March 25, 2005 your a gent ..ta! Quote Share this post Link to post Share on other sites
Walesy 0 Posted March 25, 2005 p.s (fan probably one comes on at 110 degrees?) ...thats spot on...and They are located between to top and botom hoses on the rad ..im assuming that's the one i was on about here.. Quote Share this post Link to post Share on other sites
Walesy 0 Posted March 25, 2005 p.s (fan probably one comes on at 110 degrees?) ...thats spot on...and They are located between to top and botom hoses on the rad ..im assuming that's the one i was on about here.. i can see what looks like a plug with leads on it going into the bottom of the rad ?? Quote Share this post Link to post Share on other sites
Walesy 0 Posted March 26, 2005 can anyone fill me in on why i need to take the battery off please? Quote Share this post Link to post Share on other sites
andy 0 Posted March 26, 2005 Access I imagine. Quote Share this post Link to post Share on other sites
Walesy 0 Posted March 26, 2005 Access I imagine. im more popeye before the spinache then after the spinache!...got the bit on!..but the fans still not cutting in....the pipes dont seem to be getting hot..and nor does the water if i leave the lid off...is that sayin no circulation??...maybe water pump??...or has my head gasket gone? Quote Share this post Link to post Share on other sites
h100vw 0 Posted March 26, 2005 Try the top and bottom hoses for heat. The 2 litre in my Passat runs exceptionally cold according to the gauge. Try jumping the switch wiring to get the fan on. A pair of pointed pliers should do the job without burning yourself. Probably a fat red for the power in and jump that to the other 2 wires for the 2 speeds. Gavin Quote Share this post Link to post Share on other sites
Supercharged 2 Posted March 26, 2005 Hmmm - did you take it for a run to warm up fully?? I assumed the pump and thermostat were ok as you said the fan was coming on eventually so the Rad must be getting some heat into it... Quote Share this post Link to post Share on other sites
