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Author Topic: Is the thickness of an O-RING typically oversized?  (Read 548 times)

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Offline Stoli

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Is the thickness of an O-RING typically oversized?
« on: April 10, 2013, 11:04:23 AM »

If I check the thickness of a new O-RING that is supposedly 18x3, should it measure exactly 3mm or do they typically oversize them a little? I just took one out of the package and it measures a solid 3.5mm before it starts to compress.
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Offline brooze72

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Re: Is the thickness of an O-RING typically oversized?
« Reply #1 on: April 10, 2013, 11:10:23 AM »
My understanding of "O"Rings is no, they shouldn't be over/undersized on the thickness or the ID or OD will be off spec.
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Re: Is the thickness of an O-RING typically oversized?
« Reply #2 on: April 10, 2013, 11:17:23 AM »
+1 to what Brooze said
Hondaman had some comments about rebuild/gaskets and their Orings a while back...
gist was most were too large...
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Offline Stoli

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Re: Is the thickness of an O-RING typically oversized?
« Reply #3 on: April 10, 2013, 11:34:21 AM »
Hmmm. Interesting...

I have a couple of brand new Honda rings which are listed as 18x3 (part# 91307-030-000) and the width of the ring portion measures exactly 3mm but the height measures 3.5mm and I believe it is enough to keep my neutral switch from seating properly.
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Offline Stoli

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Re: Is the thickness of an O-RING typically oversized?
« Reply #4 on: April 10, 2013, 12:24:46 PM »

Refer to new thread for a more applicable discussion on this issue:

http://forums.sohc4.net/index.php?topic=120094.0

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