Question about 2001 Volkswagen Jetta TDI
My 2001 Bora is overheating.
I checked the engine fuse and the coolant both are fine.
the fans aren't engaging
I asume that if you are checking fuses,and coolant levels that you have mechanical knowledge,without more specfic technical details,i will state the obvious,water pump. thermostat, radiator,and fans are main components in cooling system,,electric fans on newer cars are a necessity in maintaining safe operating temp.,dont have tech specifications for your vehicle in front of me at the moment,in general electric fans are controlled by a coolant temp sensor,through a relay,or relays,if you have 2 fans you will most likely have two seperate relays,but controlled by one temp sensor,or single fan and one relay,relays are supposed to be in fuse block located under hood ,but my expierience has taught me that this isnt always the case,especially with foriegn models,the manual will show fuse panel locations,and the cover on the panel,or the manual will have description of each position,the fan is the most common failure,then the temp sensor,then the relay,besides the fuse of corse,there may be more than one fuse,the fastest and most painless diagnosis technique that i have found is to just get a couple jumper wires and unplug fan or fans and using the two jumper wires ,observing polarity(+.-)briefly connect them directly to the battery,ethier they work or they dont,no confusion,if they dont work ,replace. if they do ,then troubleshooting controll components is next,i tell everybody this and for good reason,90%of troubleshooting is observation,just standing there with the hood open looking at the engine with no idea what you are looking for solves most problems,dont beilieve me try it,obviously you would focus your observation on the fan,spin the blade,see how it feels ,look at the connectors,unplug them ,inspect for corrosion,follow wire harness to fuse box location,remove relay/relays look at contacts,test fuses with multimeter even if they look good,locate coolant temp sensor check connections,this can be located in several places,thermostat housing,or intake manifold,mounted in either one of the heads on the engine,or on the radiator,if fan test is ok,locate coolant temp sensor,should have some kind of ohmn reading through it ,20 to mabey 80 ohms dont know the exact spec.on your car,but no reading or very high ohmn reading would warrant replacement,last would be relays,30 years of expierence,,relays do malfunction,but honestly i havent had to replace one for a long time ,and i do this every day,hope this helps ,post a comment if you have any questions,aloha from maui todd0708
Posted on Oct 06, 2009
It's the waterpump, they have a plastic impellerand fail all the time. To tell for sure, remove the small top hose atthe coolant bottle and hold it over the open bottle while a friendstarts the car and holds the rpm at 2000. It should have a good steady stream comingfrom that hose at all times or the pump is bad. I'd say with 99%certainty that is your problem.Let me know, if problems still persists.
Hope i helped you.
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Posted on Oct 06, 2009
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Posted on Jan 02, 2017
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