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Wednesday, March 16, 2011

I Will Never Understand Plumbing

I've been looking for a solution for my speedometer relocation.  I needed to find a way secure my trim ring that will hold the indicator lights.  I was looking for some sort of o-ring, gasket, or something with a 3 3/8" internal diameter.  I went to the plumbing department of a local hardware store and found this thing.

I don't know what it's called but it looks like a way for connecting two pieces of pipe.  It's a big rubber ring surrounded by corrugated metal and two worm clamps.

The part was marked 3" but the inside diameter of the rubber ring was a perfect 3 3/8".  I'll never understand plumbing measurements as I had a similar issue when buying a PVC cap for my ignition switch relocation.

I was able to cut the rubber ring into strips that should work perfectly.  They fit nice and snug around the speedometer.  More on that later.


Anonymous said...

I have a question about Rubber Ring size.
I live in Japan, and sizes are Metric system.
I found 90 mm ring (3.5"). So it's little bigger than the one you get. Do you think it can fit for same install as you (without indicator lights bracket ) ?
Also, did you put any joint between back cover and rubber ring ?
Thank a lot !

Gophers and Cheese said...

I think 3.5" will be loose. The one I got was a perfect fit at 3 3/8" You can find links to a few different posts showing my speedometer modification if you go to my recap post on May 16, 2011. The rubber ring that I cut from the plumbing part was just to close the gap between the clamp and backing plate. It wasn't technically needed (I could have just painted the speedometer) but I thought it looked a lot better visually. Take a look at my post on Feb 3, 2011 to see the gap for yourself. Good luck!

Anonymous said...

Thank you for always quick answer and for you help.
I already saw both of your related post before : great work !
I will continue looking for perfect fit rubber ring then ( hopefully for cheap price). I think like you it will be better with (better look + protection)… but if I can't find I will do without.
Anyway, thanks again !

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