View RSS Feed

Today at Atelier Kaz - Private NSX Enthusiast, ex-Honda R&D engineer with F1, Indy/CART background

Eng Refresh + LMA, Brake OH, etc 24

Rate this Entry









Shiny.....











TB installed and all timing markings triple checked.
Also, it’s good time for hand cranking the engine many times as you never know how much condensation were built up at the block side that was not opened this time.









On our NSX, TB tension is not continuous automatic adjuster type.
It will be adjusted just once at the time of TB service and you are going to rely on it until the next TB service so very important to adjust it properly.
Not too tight and definitely not loose.
The 1st photo is just showing the preparation of removing the slack and not the actual tension adjusting process.
You do it by the force of spring and the specific timing of camshafts.








Tension adjusted.
The last time you can see the entire TB so double checked everything again.
















Comments

  1. ozon02's Avatar
    Hi,
    Do you have any tips while tension belt -arising out of your experience - or just stick to the repair manual.
  2. Kaz-kzukNA1's Avatar
    Use decent pulley holder like in 4th photo, period.
    It will assist you a lot although you are going to have big time using it on the rear bank exh cam if you are keeping the engine inside the bay.
    After removing all the slack (very important), follow 9 cam teeth sequence as per manual.


    Kaz
  3. nikey22's Avatar
    Kaz, in your videos (~4/2013), you showed 9 cam teeth after #1 TDC; but then you showed another video with 9 cam teeth after #5 TDC.
    The video corresponding to #5 TDC demonstrated that you eventually were able to move the water pump pulley with ease which meant that the tension wasn't correct. I am assuming then you backed off the tension bolt 180degrees and let the spring tension it again, then retorqued the bolt.
    Why did you do this procedure for both #1 TDC and #5 TDC, just to make sure? Thanks.
  4. Kaz-kzukNA1's Avatar
    I took these video for one owner on NSX Prime who was doing DIY TB service in 2012.
    For some reason, he got wrong advice from somewhere and very likely adjusted the TB tension at #5 TDC.
    He claimed that the TB was so loose that he can spin the WP with just one finger.

    Should be done only at 9 cam teeth from #1 TDC.

    For the clarification, you never adjust the TB tension from #5 TDC.
    Because I couldn't re-create such loose TB tension using proper method, the #5 TDC video was taken in order to point out the mistake.

    So, it was not for 'to make sure' purpose like in your question above.
    If one made the mistake, one should do the whole process from step 1, ie; remove the slack and then adjust the tension at 9 cam teeth/blue marking from #1 TDC.

    Found the old post on NSX Prime. If you read the whole story, you will understand the background of these two videos;
    http://www.nsxprime.com/forum/showth...=1#post1658743

    Kaz