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Thread: Jass flip oil filler cap

  1. #1
    2,000 rpm - light wheelspin, no bog here! Infedora's Avatar
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    Jass flip oil filler cap

    Curious if anyone has seen one of these or something similar in the wild. Thoughts? Opinions?

  2. #2
    Supporting Member Hammerhead's Avatar
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    I have a couple of these caps, but the original (Millen, I believe) ones. The Jass one looks like a good copy. If you like it, go and buy it. It's only $125 USD and is far less expensive than the originals which had a very limited production run.

  3. #3
    2,000 rpm - light wheelspin, no bog here! Infedora's Avatar
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    Not that it probably matters, but how do you find them to use?

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    Admin / Pit Boss / Miataholic Phatmiata's Avatar
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    I think the original was from Simpson Design

  5. #5
    5,000 rpm - there be torque here! Greasemonkey2000's Avatar
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    I had Simpson Design and loved it! A well built piece and matched the Zoom Engineering fuel lid!
    '01 NB2 aka MisF1re: http://mazdaroadster.net/showthread....218#post207218
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  6. #6
    Supporting Member Hammerhead's Avatar
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    Quote Originally Posted by Phatmiata View Post
    I think the original was from Simpson Design
    That's it - Simpson Design!

    It's got a spring loaded latch mechanism that you squeeze with your fingers to release the hinged cap. The cap flips open and out of the way. Its a pain to open if the engine is hot and you have no gloves, but otherwise, it's a very nice piece of kit.

  7. #7
    Idling - Listen to it purr... TheJackel2013's Avatar
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    I have one on my car. Well built but it won't line up straight unless you 'shim' the rubber gasket. This could bother some people more than others

    fullsizeoutput_2b25.jpg

    fullsizeoutput_2b26.jpg

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    Demon I Am (04-26-2019)

  9. #8
    6,000 rpm - mere mortals would shift HarryB's Avatar
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    Your engine bay is so damn clean!

  10. #9
    Idling - Listen to it purr... TheJackel2013's Avatar
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    Quote Originally Posted by HarryB View Post
    Your engine bay is so damn clean!
    47,000 kms or 29,000 miles, and it's usually in the garage under a car cover. Sadly.

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    HarryB (04-26-2019)

  12. #10
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    I want one, but the not lining up thing would bug the crap out of me. Looks polished. I thought they were chromed. Why didn't they chrome it. Chrome is so much easier to clean!

  13. #11
    2,000 rpm - light wheelspin, no bog here! Warhammer's Avatar
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    LOL, the first thing I thought when I saw that was, "cool, but it needs to be clocked correctly."
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  14. #12
    Supporting Member Hammerhead's Avatar
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    Quote Originally Posted by TheJackel2013 View Post
    I have one on my car. Well built but it won't line up straight unless you 'shim' the rubber gasket. This could bother some people more than others

    fullsizeoutput_2b25.jpg

    fullsizeoutput_2b26.jpg
    I used a spare CAS o-ring gasket.

  15. #13
    Idling - Listen to it purr... TheJackel2013's Avatar
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    Quote Originally Posted by Hammerhead View Post
    I used a spare CAS o-ring gasket.
    Excellent suggestion. Will do it.

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