Results 1 to 4 of 4

Thread: Hot 200Tdi, Viscous fan?

  1. 14th May 2009, 03:43 PM #1
    Poida4x4
    Poida4x4 is offline Master Supporter
    Join Date
    Jul 2008
    Location
    Launceston, TAS
    Posts
    129
    Total Downloaded
    0

    Hot 200Tdi, Viscous fan?

    Gudday

    My 200Tdi Disco usually runs just under half around town. When I drive on the highway for a few days it will regularly go over half and almost to 3/4 when I will pull back a bit and take it easy. It's never been that much of an issue.

    But last week I bought a boat and while I was towing it home it got up to nearly 3/4 very quickly. The trailer tyres were flat so I pumped them up but it still ran a bit hot. It has thermofans on the front that I noticed weren't working so I took the grill off and had a look but I couldn't work it out so I took it into a radiator place to get it flushed out and investigated.

    They flushed it out, found that the thermofans come on when the aircon is on, and said that the viscous fan is no good. So I did a bit of research and got a bit of hose to test the viscous fan out with. From what I understand, when the vehicle is at running temp the viscous fan should be hard to stop with the hose but this isn't the case for mine. It's not exactly easy either, and I'm pretty sure I noticed a difference from below running temp (ie - easier to stop it warming up to running temp than at running temp).

    The thing is, I hooked the boat up to test it out and I couldn't get the gauge up to half no matter how hard I tried. It just stayed cool, so I was able to stop the fan with the hose.

    Problem solved? I hope so. Can you guys stop your fan at running temp? Also, bear in mind that the grill is still off and this will effect cooling. It'll go back on as soon as I get a chance....
    Reply With Quote Reply With Quote
  2. 14th May 2009, 05:05 PM #2
    PhilipA
    PhilipA is offline Swaggie Subscriber
    Join Date
    Jan 1970
    Location
    Avoca Beach
    Posts
    14,152
    Total Downloaded
    0
    If you ar eoverheating on the highway it was the blocked radiator, not the fan.
    Overheating at low speed is caused by the fan.

    The fan reacts to the temp of the air through the radiator . When cool a mettalic strip is contracted. When hot air comes through the strip expands and cuts off an internal oilway to stiffen the fan.

    The fan could also be crook, but your prime problem would appear to be a blocked rad.
    Regards Philip A
    Reply With Quote Reply With Quote
  3. 14th May 2009, 05:44 PM #3
    Hymie's Avatar
    Hymie
    Hymie is offline Wizard
    Join Date
    Jan 2007
    Location
    Warragul, Victoria
    Posts
    1,989
    Total Downloaded
    0
    I'd say radiator as well.
    I had a waterpump on my 200Tdi replaced in Darwin, when they topped up the coolant the mix was too weak and I ended up with a fair bit of corrosion inside the engine which blocked the core internally.
    Get the radiator tubes rodded out, clean the fins and bung 'er back in.
    Reply With Quote Reply With Quote
  4. 15th May 2009, 09:17 AM #4
    jddisco200tdi Guest
    If its been driven in bogholes you need to remove the radiator to get the mud out from between it and the aircon condenser. No amount of flushing thru will clean it.
    A new genuine thermostat is worthwhile as well.

    Regards

    John D - Defender 110 2.4
    Reply With Quote Reply With Quote
« LT230 Transfer Wear (Input Gear????) | Leaking transfer input on D2... »

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Search AULRO.com ONLY!
 Search All the Web!