Engine Temperature + thermostat issues (LOTS OF CONTENT) - Page 3 - VW Forum :: Volkswagen Forum
MK3 Discussion area for the third generation Golf III and Jetta III produced from 1993 to 1999 including Cabrio models.

Reply
 
LinkBack Thread Tools Display Modes
post #31 of 97 (permalink) Old 07-15-2010, 07:03 PM
Member
Points: 623, Level: 12 Points: 623, Level: 12 Points: 623, Level: 12
Activity: 0% Activity: 0% Activity: 0%
 
ChrisMk3's Avatar
 
Join Date: Jul 2010
Location: Vancouver, BC
Posts: 94
How would one go about figuring out if they had a bad ECT sensor or thermostat which is stuck open?

My car rarely goes above 70*C, unless I'm sitting in traffic. It takes a while to even move the gauge off the pin. I'm thinking my thermostat is probably stuck open, but is there a possibility the ECT sensor is faulty? I'd hate to go to the trouble of ripping everything apart to replace the thermostat, only to find it isn't stuck open.

93 Jetta GL 2.0 MT
ChrisMk3 is offline  
Sponsored Links
Advertisement
 
post #32 of 97 (permalink) Old 07-15-2010, 11:22 PM Thread Starter
Moderator
Points: 15,731, Level: 80 Points: 15,731, Level: 80 Points: 15,731, Level: 80
Activity: 12% Activity: 12% Activity: 12%
 
mcrow's Avatar
 
Join Date: Jun 2009
Location: Calgary, AB
Posts: 2,664
Sounds like a stuck open thermostat.
mcrow is offline  
post #33 of 97 (permalink) Old 07-16-2010, 12:05 AM
Member
Points: 623, Level: 12 Points: 623, Level: 12 Points: 623, Level: 12
Activity: 0% Activity: 0% Activity: 0%
 
ChrisMk3's Avatar
 
Join Date: Jul 2010
Location: Vancouver, BC
Posts: 94
I think you're right, because my fuel mileage sucks. The first tank of gas I got about 28 mpg, and this past time I filled up I calculated it to about 21 mpg. Guess I'll go ahead and change the thermostat. mcrow, do you know a good place to get one? Do you guys have Lordco out there in Alberta?

93 Jetta GL 2.0 MT
ChrisMk3 is offline  
 
post #34 of 97 (permalink) Old 07-16-2010, 12:06 AM
Member
Points: 623, Level: 12 Points: 623, Level: 12 Points: 623, Level: 12
Activity: 0% Activity: 0% Activity: 0%
 
ChrisMk3's Avatar
 
Join Date: Jul 2010
Location: Vancouver, BC
Posts: 94
And the thermostat housing is a dealer-only part I assume?

93 Jetta GL 2.0 MT
ChrisMk3 is offline  
post #35 of 97 (permalink) Old 07-16-2010, 07:20 AM Thread Starter
Moderator
Points: 15,731, Level: 80 Points: 15,731, Level: 80 Points: 15,731, Level: 80
Activity: 12% Activity: 12% Activity: 12%
 
mcrow's Avatar
 
Join Date: Jun 2009
Location: Calgary, AB
Posts: 2,664
Yeah we have lordco here but never bought anything from them. I buy all my stuff from Concept 1. A local VW shop here, better prices than dealer. They carry a ton of OEM parts, they just dont list em on the site.
mcrow is offline  
post #36 of 97 (permalink) Old 08-17-2010, 08:47 PM
Member
Points: 2, Level: 1 Points: 2, Level: 1 Points: 2, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Aug 2010
Posts: 1
Thermostat removal

I am in the process of try to get out the thermostat. I have already removed the power steering pump and bracket but there is still a bracket in the way that appears to be attached to the alternator. Do I have to remove the alternator to get this bracket off or am I just missing something? I looked at your diagram but I'm still a little confused, I'm gonna take another look in the morning but any help would be appreciated.
Nicterk is offline  
post #37 of 97 (permalink) Old 08-17-2010, 08:51 PM Thread Starter
Moderator
Points: 15,731, Level: 80 Points: 15,731, Level: 80 Points: 15,731, Level: 80
Activity: 12% Activity: 12% Activity: 12%
 
mcrow's Avatar
 
Join Date: Jun 2009
Location: Calgary, AB
Posts: 2,664
There is no need to remove anything to do with the alternator, just power steering. Its tight to get up at the thermostat but doable.
mcrow is offline  
post #38 of 97 (permalink) Old 09-23-2010, 11:51 PM
Member
Points: 921, Level: 16 Points: 921, Level: 16 Points: 921, Level: 16
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Jul 2010
Location: Lake Havasu City, AZ
Posts: 7
coolant quest

I see on the first thread that my coolant should be filled "50/50" What are the two components? also my reservoir thing is old and the markings are worn. How can I tell when it is filled? Also is it common to have to fill this reservoir often? I live in AZ where the temps outside reach 100+ for two to three months and have filled it at least three times since February (less than a year). It is a 97.
Thanks
kermit41878 is offline  
post #39 of 97 (permalink) Old 09-24-2010, 12:20 PM Thread Starter
Moderator
Points: 15,731, Level: 80 Points: 15,731, Level: 80 Points: 15,731, Level: 80
Activity: 12% Activity: 12% Activity: 12%
 
mcrow's Avatar
 
Join Date: Jun 2009
Location: Calgary, AB
Posts: 2,664
It should be 50/50 with water and coolant. If the water level is about halfway up the bubble you should be fine. And no you shouldnt be filling it often.
mcrow is offline  
post #40 of 97 (permalink) Old 09-24-2010, 01:19 PM
Member
Points: 921, Level: 16 Points: 921, Level: 16 Points: 921, Level: 16
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Jul 2010
Location: Lake Havasu City, AZ
Posts: 7
One more quick thing

My bubble is so bad that I cannot even tell if it is full by looking through it. It is more like a yellow color than white/clear. If I were to google this part in order to replace it, what would I call it?

BTW you rock!
Thanks
kermit41878 is offline  
post #41 of 97 (permalink) Old 09-24-2010, 06:42 PM
Member
Points: 623, Level: 12 Points: 623, Level: 12 Points: 623, Level: 12
Activity: 0% Activity: 0% Activity: 0%
 
ChrisMk3's Avatar
 
Join Date: Jul 2010
Location: Vancouver, BC
Posts: 94
It's called the coolant expansion tank. Germanautoparts.com has it here for $17.

93 Jetta GL 2.0 MT
ChrisMk3 is offline  
post #42 of 97 (permalink) Old 10-08-2010, 04:19 PM
Member
Points: 6, Level: 1 Points: 6, Level: 1 Points: 6, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Oct 2010
Posts: 2
1996 Golf ABA 2.0L

There's an o-ring that's supposed to be changed every time you split the quick-connect between the lower rad hose and the thermostat housing (the one you pull the clip on). Any idea what size this o-ring is? Went to a VW dealer and they said they don't carry it, so am looking at an alternative.

Changed whatever the muddy green stuff was to G12. Just pulled the lower rad hose off the plastic elbow instead of pulling the clip to split the thermostat flange from the elbow.

Last edited by karmutzen; 10-08-2010 at 08:00 PM.
karmutzen is offline  
post #43 of 97 (permalink) Old 10-08-2010, 08:30 PM Thread Starter
Moderator
Points: 15,731, Level: 80 Points: 15,731, Level: 80 Points: 15,731, Level: 80
Activity: 12% Activity: 12% Activity: 12%
 
mcrow's Avatar
 
Join Date: Jun 2009
Location: Calgary, AB
Posts: 2,664
Are you talking about the thermostat o-ring? Because thats the only o ring down there.
mcrow is offline  
post #44 of 97 (permalink) Old 11-01-2010, 04:06 PM
Member
Points: 16, Level: 1 Points: 16, Level: 1 Points: 16, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Nov 2010
Posts: 5
Another Question...

New here, have a 96 Golf & Love it.
Just replaced the Coolant flange due to a small crack in it, and still over heating. Replaced the Thermostat (not ez) and have sufficient coolant in it. Still Overheating...Having read the temprature on different hoses could this be the water pump not circulating properly??? And is this a big job?
Any help appreciated.
JKad
jkad is offline  
post #45 of 97 (permalink) Old 11-01-2010, 05:26 PM Thread Starter
Moderator
Points: 15,731, Level: 80 Points: 15,731, Level: 80 Points: 15,731, Level: 80
Activity: 12% Activity: 12% Activity: 12%
 
mcrow's Avatar
 
Join Date: Jun 2009
Location: Calgary, AB
Posts: 2,664
are your fans turning on?
mcrow is offline  
Sponsored Links
Advertisement
 
Reply

  VW Forum :: Volkswagen Forum > Volkswagen Models > MK3

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the VW Forum :: Volkswagen Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 3 (0 members and 3 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Golf VR6 1999 - Engine Temperature stecoogan MK4 2 06-09-2009 09:38 AM
Engine temperature sensor prob (03 GT TDi 130) Si.M MK4 3 12-11-2008 10:23 AM
Engine Coolant Temperature (G62) wire lead broke at connector skinton MK4 1 09-15-2008 02:49 PM
2000 Passat - Issues with cabin temperature! delipete Passat 0 11-26-2007 04:55 PM
engine issues sleepergti94 MK4 14 11-21-2005 04:56 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome