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  1. Car not staying at temp, bad thermostat??

    B5 Garage
    My new to me B5 Passat 1.8t is having some issues. The first drive of the morning the car takes FOREVER to reach the 190° mark on the coolant temp gauge. After it reaches that point it’ll stay there for a few minutes and then start dropping back down. The heat also blows “warm” but not by any...
  2. Temperature sensor problem (B5.5 1.9TDI, 96kW AVF)

    Volkswagen Passat B5 Discussion
    Hi, I have problem with temp. on dashboard. Suddenly, temperature drops. When I hooked up VCDS I have two different results: About 3 years ago, thermostat was changed. Thanks to all.
  3. Aluminium thermostat housing

    Volkswagen Passat B5 Discussion
    I was wondering if anyone knew what v6 2.8 passat/Audi came from factory with an aluminum thermostat housing. I'm working on timing my car and found a coolant leak at the plastic housing
  4. 01V 5HP19 additional trans filter, thermostat and cooler

    B5 Garage
    I have a 2003 Passat TDI with an 1.9 AVF engine and a 01V 5HP19 Tiptronic auto transmission. Purchased the car last year with 300K km and a bad transmission, reverse issues due to oil pump bushing and a broken drum but not the D-drum. I replaced it with a used trans and, after testing,removed...
  5. Thermostat stuck open - Add another one in a hose?

    B5 Garage
    OK - crazy idea time. Thermostat is stuck open in my 03 v6. 270K miles and not too long for the world...but still need it and the heat is only good at idle and I don't feel like tearing it open to replace the T-stat right now in the cold. Here's my idea....since the thermostat is stuck open -...
  6. How Risky is Driving with a Failing Thermostat on 2001.5 Passat GLX V6 ATQ?

    Volkswagen Passat B5 Discussion
    Symptoms: On a road trip, my dashboard temperature gauge wasn't coming up to normal mid-dial 190 degrees F. It was fluctuating at lower temps. I could still get adequate heat in the car, but I might have had to set the temperature higher than usual. A short time later I got a Check Engine...
  7. 2004 VW Passat GLX 4 Motion 2.8 litre, Thermostat question

    B5 Garage
    Greetings- Finishing up the timing belt job and one thing that I can't remember, does the thermostat O-ring gasket fit behind the thermostat or in front of it? Thank you, Paul
  8. "Big spark" when removing thermostat housing

    Volkswagen Passat B5 Discussion
    My thermostat housing had a crack and was leaking. When I try to remove the first of the two bolts holding the housing, a big spark came out and almost damaged the hex bit. I was not sure if the wrench occasionally touched the alternator. Tried again and made sure not touching the alternator, it...
  9. FS: ECS assembled Ultimate timing Belt Kit with thermostat

    Parts For Sale
    Bought this timing belt kit but didn't install it before selling the car. $350 new with free shipping through ECS. For a 2008 BPY B6 Passat. I'd like to get $300 OBO. Will cover up to $40 of shipping costs. It's fairly heavy, so...
  10. 2.8 v6 thermostat replacement (No TB removal)

    Volkswagen Passat B5 Discussion
    I haven't found anything on the passat forum regarding the removal of the thermostat without removing the timing belt, so I figured I'd shed some light. You do the normal procedure in removing the front end down to the TB. Here are the videos I've found on our 2.8s that shows the step by step...
  11. 1.8T not warming up past 90 degrees. Thermostat?

    Volkswagen Passat B5 Discussion
    If I recall correctly, it's supposed to run at 190. I assume this is a bad thermostat.?.. Of course, there's little heat inside the car... kinda like driving an old Beetle. I flushed my coolant... 14x, so that's good. And I flushed my heater core until clear.
  12. Does the 1999 V6 thermostat have one or two orings?

    Volkswagen Passat B5 Discussion
    This deserved a separate thread because AndreasPassat and I are discussing an issue that is puzzling. He's convinced that there are two orings, and I only have one. I have one on the old one I removed, and only one came with the new one I'm about to install. It mounts on the outside of the...
  13. Thermostat housing leaking - how difficult to repair ?

    Volkswagen Passat B5 Discussion
    Hello all. As the title states, my 2002 V6 has developed a coolant leak. It only leaks after the engine has warmed up, and continues leaking after the engine is no longer running. From what I can see, the leak is coming from right below where the lower radiator hose connects to the housing...
  14. B5.5 1.8t new thermostat overheating

    Volkswagen Passat B5 Discussion
    So long story short, 2002 Passat 1.8t with 134,000 miles had a bad thermostat that was stuck open, it would take forever to warm up and would never warm up in the cold. The PCV pipe was broken under the intake manifold so it stunk up the vents really bad. Multiple vacuum leaks and it was getting...
  15. 2007 2.0t Cooling fans not coming on, fcm and fan replaced. Thermostat replaced

    Volkswagen Passat B6 Discussion
    So this saga begins with the overheating of the car. No spray or steam (ie, hoses intact) and coolant level fine. Had the car towed to the house. First thing everyone says is to replace the thermostat. In this car you have to take off the alternator, etc. etc. and then you replace the whole...
  16. Why cant anyone tell me whats wrong with my 2003 Passat?

    Volkswagen Passat B5 Discussion
    In July 2003 Passat with 1.8V engine, suddenly started smoking under the hood and all radiator fluid poured out. Backyard mechanic said a hose had come off and we needed a new one, the one on the bottom from the radiator. Also claimed a thermostat would be needed. Said he would come back the...
  17. I replaced thermostat on 1.8T AWM. Please chime in

    Volkswagen Passat B5 Discussion
    03 B5.5 1.8T AWM 208kkm (130kmiles) I was getting the P2181 code, and on the highway the temperature would range between 58-62 centigrade, idling it would get closer to 85. Operating temp is in the 90's. I bought the thermostat and replaced it last night. I drained the coolant, and the...
  18. MK6 2010 Passat B7 TDI running cold - Please help

    Volkswagen Passat B7 Discussion
    Hi, I'm looking for some assistance in trying to diagnose my 2010 B7 3C 125TDI CFGB engine Passat which is running cold. Initially I suspected the thermostat because even after an hour running along the freeway, the temperature would float around 50-60c (outside temperature between 5-15c)...
  19. changed thermostat, now its overheating and no heat

    B5 Garage
    I just changed my thermostat in my 03 passat 1.8t with 106k miles. I bought a new thermostat at Advanced Auto, came home and changed the thermostat out. Filled up the coolant tank and closed the cap. Then started the car, ran the heat and then after about 10 min, the temp started raising 200 and...
  20. Passat b5.5 2005 TDI overheating

    Volkswagen Passat B5 Discussion
    The car started overheating just as winter is ending anytime I get on the highway. It will float from 90C up to about 115C going back and forth depending on how Im driving. There is hot air blowing out of the vents at all times. This is what made me think it is the thermostat, but when I...