SPONSORED LINKS

Replaced coolant flange, coolant temp sensor.

Tiny
LOUSIMPSON
  • MEMBER
  • 2000 VOLKSWAGEN JETTA
  • 10,500 MILES
Replaced coolant flange, coolant temp sensor, and thermostat. Drove fine for a few days, now car overheating, coolant leak under passenger side, no heat coming out of vent. What should I check next? 2000 vw jetta
Wednesday, October 24th, 2012 AT 7:37 PM

11 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
I would start with finding the leak. Top off the cooling system and apply some pressure to it.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, October 24th, 2012 AT 7:41 PM
Tiny
EXOVCDS
  • MECHANIC
  • 1,883 POSTS
Water pump impeller is broken, replace water pump and timing belt kit..

http://www.youtube.com/watch?v=WJlS7MvfRXo&feature=plcp

Thomas
Was this
answer
helpful?
Yes
No
Wednesday, October 24th, 2012 AT 8:31 PM
Tiny
EXOVCDS
  • MECHANIC
  • 1,883 POSTS
2.0L timing belt removal video:

http://www.youtube.com/watch?v=4N3QpRgvYsQ&feature=plcp

Thomas
Was this
answer
helpful?
Yes
No
Wednesday, October 24th, 2012 AT 8:33 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
I guess your crystal ball sees things that mine doesn't
Was this
answer
helpful?
Yes
No
Wednesday, October 24th, 2012 AT 8:39 PM
Tiny
EXOVCDS
  • MECHANIC
  • 1,883 POSTS
I know VW & Audi. That's why I only post in the VW & Audi section.

Thomas
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, October 24th, 2012 AT 8:42 PM
Tiny
EXOVCDS
  • MECHANIC
  • 1,883 POSTS
Quick way to confirm water pump flow or lack of flow:

http://www.youtube.com/watch?v=thcwatH_BpI

This is me being helpful... not advertising my youtube channel.

Thomas
Was this
answer
helpful?
Yes
No
Wednesday, October 24th, 2012 AT 8:44 PM
Tiny
LOUSIMPSON
  • MEMBER
  • 3 POSTS
Thanks everybody for your responses. Thomas, I tried the water pump test in your video and I got no flow until I hit the accelerator. That seems to be the problem.
Was this
answer
helpful?
Yes
No
Thursday, October 25th, 2012 AT 12:51 AM
Tiny
EXOVCDS
  • MECHANIC
  • 1,883 POSTS
Hi, have you had a chance to see where the leak is? Passenger side of engine would be the water pump. Leak
would be dripping from under the crankshaft pulley. It is a 2 liter engine, yes?

If the leak is behind the engine (towards the firewall), then the leak is either a heater core coolant hose flange
or the heater core itself (leaking out the A/C drain).

Thomas
Was this
answer
helpful?
Yes
No
Thursday, October 25th, 2012 AT 1:57 AM
Tiny
LOUSIMPSON
  • MEMBER
  • 3 POSTS
Good morning Thomas. After I replaced the thermostat, the only leak I see is on the passenger side but further back, almost like the fluid is traveling along a line then dripping. As I stated previously, I tried the water pump test from your video and that might be the problem. The car runs fine, but no heat from the vent and when I took it around the block last night, the engine temp went up quickly. The hose that leads to the thermostat is warm; could it be something else maybe?
I understand that replacing the water pump can be a bit of a job.
Was this
answer
helpful?
Yes
No
Thursday, October 25th, 2012 AT 3:09 PM
Tiny
EXOVCDS
  • MECHANIC
  • 1,883 POSTS
No heat from vents is another verification that the pump is not circulating.

The upper hose always gets hot. The lower one will stay cool(er) when the pump does not circulate.

Thomas
Was this
answer
helpful?
Yes
No
Thursday, October 25th, 2012 AT 3:18 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Good to know
Was this
answer
helpful?
Yes
No
Thursday, October 25th, 2012 AT 6:09 PM

Please login or register to post a reply.

Related Coolant Temperature Sensor Content

Coolant Temperature Sender Replacement
VIDEO
Coolant Temperature Sender Replacement
Instructional repair video
Coolant Temperature Sensor Symptoms
GUIDE
Coolant Temperature Sensor Symptoms
An automotive engine coolant temperature sensor, (ECT) sensor, or sometimes called a cylinder head temperature sensor is used to generate feedback information to the PCM...
VIEW MORE

Sponsored links