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No thermostat....open flaps?

Discussion in 'Engine & Transmission' started by Ian and Shelley, Sep 7, 2019.

  1. Ian and Shelley

    Ian and Shelley Active Member

    Messages:
    190
    Location:
    Umina Beach
    Hello..

    The ongoing..what's that...and
    why is that missing continues...

    The thermostat that operates the oil cooling flaps is missing, guess it's been missing for ages...

    I understand flaps open when engine heats up from expansion of thermostat....

    Questions are

    How can I confirm flaps are staying open ?

    Do I even have flaps?

    It appears the connecting rod to both flaps is also missing so I HOPE AND ASSUME previous owner removed thermostat and flaps...

    Is inspection and Replacement only possible through engine removal..

    When driving oil temp is around 100C so I don't think it's over heating..but would like to confirm flap.position if possible

    Thanks to all
     
    Mr Beckstar likes this.
  2. cbus

    cbus Well-Known Member

    Messages:
    11,760
    Location:
    sunshine coast
    If you do not have the cross bar then won't have the RHS flap. No problem .
    If bar IS there then usual default position is open.

    There may?? Be a lhs flap stuck in place ??
    It seperates airflow between engine and oil cooler.
    It won't block airflow to engine in open or closed position.

    If oil temp has a max of 100 then it's reasonable assumption that there's enough air diverting to oil cooler.

    Slower warmup seems only issue currently.

    It is possible to remove the fan housing for access with engine in situ.

    Easiest check would be an inspection camera thru the holes that normally take the cross shaft of flaps.
     
  3. Ian and Shelley

    Ian and Shelley Active Member

    Messages:
    190
    Location:
    Umina Beach
    Thank you for advice and confirmation...

    Another job to add to the to do list when I finally get to pull the motor out!!

    Thanks again
     
    Mr Beckstar likes this.
  4. tintop

    tintop Well-Known Member

    Messages:
    501
    Location:
    Canberra
    Number 2 & 4 spark plug holes give a good angle for an inspection camera too
     
    Mr Beckstar, Grantus and cbus like this.
  5. Mr Beckstar

    Mr Beckstar Well-Known Member

    Messages:
    1,021
    Location:
    Bateau Bay, NSW
    Here’s a video I made showing how they work. As the saying goes, I’ve got a great head for radio.
     
    oldman, tintop, 68BUS and 2 others like this.
  6. Mr Beckstar

    Mr Beckstar Well-Known Member

    Messages:
    1,021
    Location:
    Bateau Bay, NSW
    It’s a common misguided modification to remove the shaft and the right flap and to pop rivet the left flap down into the maximum cooling position. I say misguided because the resulting slow warmup time is not good for the engine. If the left flap is completely removed, it’s even worse because you don’t get proper air flow to the oil cooler.
     
    Mordred, Wayne murray and David H like this.
  7. David H

    David H Well-Known Member

    Messages:
    4,831
    Location:
    newcastle
    Great video for helping understand what happens Chris:cool:. & thanks for always talking to me like I understand Kombi engines:). I'm an owner/enjoyager with a good mechanic for 40 yrs;). Starting to understand a little more with your explanations.
    Cheers
     
    Wayne murray and Mr Beckstar like this.

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