2000 Golf overtemp

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2000 Golf overtemp

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2000 Golf overtemp - 4/17/2008 7:11:10 PM

erndogy

Posts: 4
Joined: 4/17/2008
Status: offline

Hi all,
On the way to work today the coolant overtemp light came on and I noticed the temp was almost maxed out. I turned on my heater full blast and stoped. Checked for leaks and coolant level and found no leaks and level was perfect. The fans were on and the serpanteen(?) belt is on and good. I turned off the engine for about 5 min. I decided to try to get off the freeway. When I turned on the car the temp was in the normal range with the needle right in the middle. So I thought the overtemp condition could have been an false reading. After about a minute the temp just shot up to almost max. Made it off the freeway to a gas station.
Double checked everything and all looked good except I could hear what sounded like water boiling. So the car is actually overheating.

Let the car sit a bit opened the reservoir. Coolant level was normal until I took the top off. Then it overflowed. Checked the water hose coming from the bottom of the radiator and it seemed to be warm, but not hot. Also it seemed to be thinner than it should be like it was under vacuum. I turned the car on and temp was ok for about 5 minutes then it started to go up again. Got towed home.

My questions are what should I look for? I think either the thermastat is stuck or the water pump failed. Does anyone know how I could check them? Also the car has over 103k miles and is close to needing a belt replacement. If it is the water pump is it too much more work to replace the timing belt? Does any one have or know where I can get a procedure for it? What repaire manual is recommended for this car?

Thanks in advance for your response.

Ernie

Post #: 1

RE: 2000 Golf overtemp - 4/17/2008 7:15:22 PM

Jrailer

Posts: 177
Joined: 12/8/2007
Status: offline

probably the water pump
they have plastic impellers on them
with the car coold down pull the small hose to the resivor bottle off and have her start the car see if the coolant flows out of the hose
if it dosnt the pump is bad
if it does rev it up a little and see if it flows faster or stops flowing
if it stops flowing the impeller has just started to come apart

(in reply to erndogy)

Post #: 2

RE: 2000 Golf overtemp - 4/18/2008 2:16:24 PM

emagdnim

Posts: 131
Joined: 7/24/2006
Status: offline

yeah or thermastat, if it failed while closed, the hot coolant has no where to go to cool off. just continues to heat up

(in reply to Jrailer)

Post #: 3

RE: 2000 Golf overtemp - 4/18/2008 3:28:36 PM

bagel

Posts: 1024
Joined: 8/16/2005
Status: offline

Yea I would agree, it's a good idea to change your thermostat every so often anyways. It's easier then changing the water pump I would say.

_____________________________

'00 Jetta VR6 GLS 12V 2.8L
Magnaflow Exhaust
Custom Cold Air Intake
Eurosport Underdrive Pulley
GIAC Chip
Diamond Mesh Grill--Front
Smoked Euro Tail Lights
18" ADR Rims On Toyo Proxes
Pioneer Deck, 2400W Rockford AMP, 2-12" Alpine Type

(in reply to emagdnim)

Post #: 4

RE: 2000 Golf overtemp - 5/2/2008 11:13:56 PM

erndogy

Posts: 4
Joined: 4/17/2008
Status: offline

OK so here is what happened. I tried what Jrailer suggested and nothing came out. I figuered, car has 100k+mi and will need a timing belt. While in there might as well replace the water pump and thermastat and drive belt.

That was a job and a half! Lift the engine, remove the motor mount, work from the passenger side wheel well...

Found the pump was the problem. Impeller was broken in half. Replaced timing belt, water pump, and thermastat. Flushed the cooling system and installed new coolant. To top it off I removed the #1 cylinder to hook up the pressure checker to find tdc and damaged the wire. Ended up replacing the spak plugs and wires......Not cheap.

Oh well....Replaced wipers. Got air filter and oil and filter also. Will do that this weekend.

I have a question for you guys. Volkswagen says to use only the red extended life coolant. The couple of parts stores I went to adviced me on using the extended life green coolant. I did but I want to know if I did the right thing. Should I worry about and flush and replace again or will it be ok? Are extended life green coolants coprable to the red stuff?

Ernie

(in reply to erndogy)

Post #: 5

RE: 2000 Golf overtemp - 5/3/2008 8:46:51 AM

bagel

Posts: 1024
Joined: 8/16/2005
Status: offline

The Green stuff gels up the sytem. I ALWAYS get my coolant from VW dealer, little expensive but less than changing coolant system. I get everything from the dealer just to be safe.

_____________________________

'00 Jetta VR6 GLS 12V 2.8L
Magnaflow Exhaust
Custom Cold Air Intake
Eurosport Underdrive Pulley
GIAC Chip
Diamond Mesh Grill--Front
Smoked Euro Tail Lights
18" ADR Rims On Toyo Proxes
Pioneer Deck, 2400W Rockford AMP, 2-12" Alpine Type

(in reply to erndogy)

Post #: 6

RE: 2000 Golf overtemp - 5/3/2008 10:37:33 AM

Jrailer

Posts: 177
Joined: 12/8/2007
Status: offline

glad to help
you should be ok it just dosnt last as long (extended life) but it still does the job

(in reply to bagel)

Post #: 7