Question about 2008 Volkswagen Jetta Wagon

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Jetta 1.9 tdi runs hot

Jetta tdi runs hot have changed tstat fan switch,water pump 10k back have flow through rad. can fan control on ac have anything to do with running hot if you dont run a/c dont run hot until about 65 mph for a while. after flush can i use any brand coolant as long as it is 150,000 mile universal. driving me nuts

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  • Volkswagen Master
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DID YOU CHANGE THE THERMOSTAT IN THE WATER PUMP HOUSING.FOLLOW TOP RADIATOR HOSE TO IT.

Posted on Oct 04, 2009

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Posted on Jan 02, 2017

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What is the problem with my 2003 VW Jetta 2.0 overheating?


It may also be the temperature sensor.
Not knowing your model, if it uses both a belt driven and electric fan, the electric fan (or its sensor) may have failed.
Turn on the AC to see if the electric fan will cycle as it should since this is used (in most vehicles) for engine cooling if the main fan isn't adequate whether AC is in use or not.
On high mileage engines if distilled water was not used instead of tap water (along with coolant), the radiator core can eventually become clogged with calcium deposits. .

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Rad hoses super hot 95 jetta


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2001 vw jetta 2.0 over heating no fans


Had this happen to my '99 Dodge several years ago. Wasted a lot of money trying to figure it out. I believe it ended up the fan relay switch- cost about $50. Took less than 10 minutes to switch it out.

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2004 dodge 1500 hemi, 5.7,.....running hot at highway speeds,I have flushed the system 2 times, replaced thermostat.....still runs hot at highway speed.....I have read about " back flushing the...


If running ok at idle and not running hot, then I'd first examine my rad hoses very carefully, especially lower rad hose. If old and soft, easy to squeeze then replace it/them. Also replace rad cap as well. A soft hose may be collapsing when engine RPM increases, and restricting flow through engine. Next would be to observe water flow with engine running to be sure water pump is doing it's job. I assume you have cleaned and checked rad already. Note: if you run at highway speeds and it gets hot, try turning heater on high fan and hot setting to see if temperature gauge goes down at all, which would make me lean toward a faulty radiator.

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2002 Jetta 1.8T blew 40A cooling fan fuse - overheated, destroyed 4 way cooling hose connector - replaced all- now it still runs very hot, inside temp reads 190 (but temp is much higher), cooling fans run...


Then replace the thermostat, because if on lower hose not hot and on upper hose scalding hot = antifreeze flow blocked by the thermostat wich remains closed!!!

Thermostat replacing:


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Changed thermostat and added coolant but 1997


could be waterpump?
i was going to say rad fan,but if so heater would be hot.
lack of coolant will make heater core to blow cold,if engine heats up with full coolant,usually means poor or no circulation.
water pump?
run engine with full coolant,at operating temp.with rad cap off and look in rad cap hole and see if there is movement of water inside rad.
[rad fan will not come on if water is not circulating through rad water pump?]

Dec 20, 2009 | 1997 Chrysler Cirrus

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2004 dodge intrepid running hot. i change the themostat on it and it still running hot.what puzzles me is that the hose that goes into the radiator is hot while the bottom hose that comes hot of the...


not likely it is more than likely the waterpump, make sure the thermostat was not put in upside down. if fan is not kicking on it is a fuse or coolant switch for the fan

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1994 Honda Civic LX\overheating within 2 mile drive


Remove and raise upper hose at thermostat end and remove lower rad hose.
Fill rad with a hose and watch for flow from bottom rad hose and/ or bottom rad hose connecton.......water should fall though rad easily.
Honda rads are cheap.....any restriction....replace rad.

Remove thermostat....fill thermostat housing with hose and watch for water flow at bottom rad hose.
Flush good.

Remove heater hoses.......flush back and forth until a good flow is present "With heater control set to hot" if no or poor flow....replace heater core.

Stop leak can plug everything.

Also.......not likely causing over heating....but ....at your mileage,if you do not know if the timing belt has been changed.....CHANGE IT NOW!
Water pump is optional at this mileage.

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If you're car has been running fine, then suddenly won't start, the cause is frequently that the fuel pump cutoff has been tripped. Open your trunk, and look for a label for a fuel pump cutoff switch. Locate the switch, press it in, and see if the engine will start.

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2002 V.W. Jetta 2.0 liter overheat


turn your heater on to max heat and high fan. then see if you can feel the hoses on the firewall for heat they should be hot. make sure that the fan unit on the radiatoris working if the upper radiator hose is hot the fans should be running if they are not that means that either the relay is bad the thermo sensor is bad or the fan unit is shot... please rate the solution..........thanks

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