Sky InsuranceMonster Motorsport
Results 1 to 6 of 6
  1. #1
    Reverse Gear

    Status
    Offline
    Join Date
    Jan 2010
    Posts
    1

    Overheating 2001 s3

    hello all,
    right this all started about a month ago when it got cold. the coolant temp warning light came up on the dash, turned the ignition off and back on again, it was fine. this happened twice more about 2 weeks apart. it has always sat at 75 - 85c on the dash temp gauge with normal driving. but this day i got a light whilst driving, looked down to see the gauge nearly off the scale! pulled over only to be greated with a warm engine not really hot. i went to a mates, car was fine. left 1 hour later and drove for 2miles then then the warning came on.
    these are the probs:
    1. the fans do not come on when the aircon is switched on
    2. changed the thermostat
    3. the top rad hose is hot the bottom is cold
    4. the heater blows cold until the temp gauge reads 100+ then its only luke warm
    5. no gunk to be seen under the oil cap
    6. the waterpump seems to work as you can see the water returning to the expansion tank

    anyone out there who can help

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    Reverse Gear

    Status
    Offline
    Join Date
    May 2009
    Posts
    28
    Have you lost any coolant during this time?
    The water you see returning to the expansion tank could just be convection currents and not necessarily confirmation that the water pump is working properly. Water pump blades failing on the 1.8T engines is a known issue, it could be your problem. When was the water pump last changed and how many miles have you covered? I don't have any first hand knowledge of what the symtoms are for water pump blades failing, but it sounds like this is most likely to be your problem...

  4. #3
    MIKE GTR's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2009
    Location
    WICKFORD, ESSEX
    Posts
    366
    The impellers on standard water pumps are plastic and therefore break 1 by one overtime rather than an all out failure like most waterpumps. I'd get the system blown thru with compressed air, most garages have a tool that can pressurise the system, it may just be a blockage, or it could be a bugger rad

  5. #4
    mk1chopper's Avatar
    Missing the S3

    Status
    Offline
    Join Date
    Oct 2006
    Location
    Bedford
    Posts
    1,095
    The coolant temp warning coming on when your first start the car then goes away or if you turn off the the car and restart doesnt comes back will be the coolant level sensor in the coolant exspansion tank, unfortunatly you cant replace the sensor you have to replace the whole tank, its not expensive just a bit of a ball ache. I'd read you can clean the sensor too which sometimes solves the problem. As for the other issue does sound like your pump blades might have failed if you've changed the thermostat and its still not circulating properly.

  6. #5
    golf's Avatar
    ***** rent boy

    Status
    Offline
    Join Date
    Jan 2007
    Location
    London
    Posts
    1,553
    Nearly 90%* of all overheating problems on the 1.8T block is down to the crappy water pump VAG insist on fitting.








    * 90% figure is entirely made up, but it's very, very common.

  7. #6
    Welly's Avatar
    VX220 SC Driver :)

    Status
    Offline
    Join Date
    Aug 2009
    Location
    Gloucestershire
    Posts
    10,695
    Quote Originally Posted by golf View Post
    90% figure is entirely made up, but it's very, very common.
    LOL. Brilliant! It's OK, 60% of statistics are made up on the spot....

    Not a dicky thermostat and CTS? Never heard of one going up to 100+ though I must admit...

    Maybe that thermostat is stuck closed?
    Last edited by Welly; 14th January 2010 at 16:00.
    ------------------------------------------------------------------------------------------
    "Marriage is like a coffin and each kid is another nail."
    Homer Simpson





 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO