Honda Civic coupe vti 1999.

I bought this replacement cap and fitted it. Unlike the stock or other caps it doesn’t have a asteroid shape so it’s harder to screw down.

Anycase I screwed it in but I notice i can take it off with my left hand using a little bit of pressure. I tried to tighten more but as there’s no grip seems difficult.

Just wondering if it’s safe to use this cap on any car whenever I take the oil filler cap off I usually find I need to use a lot of pressure. If this is coming off with my left hand(I’m right handed) and a little bit of pressure is there something wrong? As I say there’s not much grip to keep tightening.


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  • Perhaps you can put a long bar through the holes and get it mega tight.
    – Solar Mike
    Commented Oct 4, 2021 at 15:49
  • With all those holes in it, it looks like a (supposedly) cool looking weight-saving gizmo intended for car modders or wannabe race car drivers, not for "normal use."
    – alephzero
    Commented Oct 4, 2021 at 16:20
  • If it comes off with a little bit of pressure it's not going to work.
    – GdD
    Commented Oct 4, 2021 at 16:40

1 Answer 1


If you feel it needs tightening a little, then put a long screwdriver all the way through the holes and tighten it. Don’t overdo it though. You will then need to make sure you have a screwdriver handy in case you need to remove it.

  • @JamesWilson - And if you attached the o-ring as I suggested and you do this, you'll tear it from the cap. If you're feeling any resistance when you un-tighten the cap, more than likely it is tight enough. +1 Howie, as this is about as good of an answer as someone can give. Commented Oct 4, 2021 at 19:25
  • Maybe this cap would have "felt right" in terms of resistance before you decided the O-ring wasn't fitted correctly and "redesigned" it. But it's too late to find out now.
    – alephzero
    Commented Oct 5, 2021 at 12:04

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