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    Thread: What did you do to your mk1 today?

    1. Member
      Join Date
      Dec 22nd, 2008
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      3,945
      09-17-2020 03:11 AM #10026
      New rad fan arrived. We’ll see if it helps with temps at all.

      eBay special top, new SPAL below.


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    3. Member
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      Apr 24th, 2007
      Location
      Kailua, HI
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      79 VW Rabbit/13 VW GTI/ 09 Daytona 675
      09-17-2020 11:43 AM #10027
      Quote Originally Posted by thegave View Post
      New rad fan arrived. We’ll see if it helps with temps at all.

      eBay special top, new SPAL below.

      Issues still? I’m gonna try and fab something up like oem to try and keep the airflow straight on the radiator.


      Sent from my iPhone using Tapatalk

    4. Member
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      Dec 22nd, 2008
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      09-18-2020 01:49 AM #10028
      Yea I’m hoping it’s just an airlock but more likely the new oil cooler is still blocking too much of the rad for it to function effectively. Right now the oil cooler is sealed to the rad so any air passing through the oil cooler has to go through the rad. I may try removing those baffles to see if that helps.

      I created baffles for the sides and top of the rad so all air is being drawn from through the grille.

      The problem of course is that summer is over and I don’t think I’ll be seeing any triple digit days for stress-testing til next year.

    5. Member fourmotioneer's Avatar
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      May 15th, 2009
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      88 Milano Verde, 13 Abarth, 04 Maserati Coupe 6MT, 04 Passat wag 4mo 5MT, 19 Alltrack 6MT, 81 Caddy
      09-18-2020 09:09 AM #10029
      Quote Originally Posted by thegave View Post
      Yea I’m hoping it’s just an airlock but more likely the new oil cooler is still blocking too much of the rad for it to function effectively. Right now the oil cooler is sealed to the rad so any air passing through the oil cooler has to go through the rad. I may try removing those baffles to see if that helps.

      I created baffles for the sides and top of the rad so all air is being drawn from through the grille.

      The problem of course is that summer is over and I don’t think I’ll be seeing any triple digit days for stress-testing til next year.
      Problem at idle? Many variables, but my guess is that the vehicle speed-based airflow exceeds fan-driven airflow at somewhere between 5-10mph with a fan that size. Baffles will almost certainly hurt the fan flow but could definitely help the airflow at speed

    6. Member fastinradford's Avatar
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      Aug 2nd, 2010
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      West side of Oregon
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      81 caddy VNT MTDI 02a.
      09-18-2020 11:16 AM #10030
      I let my cooling system drain 100% over the course of 3 weeks.

      Upon filling I burped the coolant for half a day.
      Drove it, overheated.
      I ended up having to remove the upper radiator hose until coolant began to flow out.

      The reservoir was FULL but no amount of driving could purge the bubble.

      Just a little story of my efforts.
      And I have a big radiator and stock fan bypass (fans were little help)

      And my truck has always been cool as a cucumber.

      I took it through Death Valley on a 120f day and unless I idled for significant time, the rad fans didn’t even kick on.
      Stayed right at the thermostat rating.

      It was exciting to overheat.
      I hadn’t had a single problem in- forgot when.
      smiles per gallon in a tdi rabbit are unreal

    7. Member
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      Dec 22nd, 2008
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      09-18-2020 06:53 PM #10031
      No problems at idle. Gets hot cruising around town at low boost unless I turn on the heater fan at max speed and fully open the heater matrix. Which makes me think it’s not an airflow problem at all but limited heat shedding capacity. Does that sound right? If so then the fan was unnecessary.

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