rotor filler cap
 

my new rotor temp filler cap

So it's telling you the ambient temp under the hood?

I knew someone would come up with another place to stick a gauge...lol!

(I'm working on a clock that goes in your exhaust pipe! :P )

it's screwed onto the thermostat housing so I'm sure it's measuring coolant temp...although not sure how accurate it will be. Interested in seeing temp comparisons.

I like it.

Thanks, it reads coolant temp, the cap on its own does not fit so i pulled it apart and got a spare cap and cut the tabs off, then purchased a rotor shaped brake fluid cap from 13b1 and lathed the thread down and a hole in the top and put all three together.
I have four exhaust pipes with a clock in each one, to read four different time zones :) so you can keep your one clock for yourself :):):)

I saw your interior and I think you are a great inventor
Keep the nice work , your inspiring others ;)

Thanks, lots more to come.

:lol::lol::lol::crackup::crackup::jump:

here are a few more, glad i could make you :lol: :crackup: :jump: look i can click on an icon too :nod:

Don't have any good pictures, but did something similar.
A vendor kept sending me the wrong size cap for my brake master. I gave up after the second one, but didn't have anything to do with the two wrong caps and the vendor didn't want them back. So I just dremeled one out and press-fit one onto the PS pump cap..with a little glue. More dremeling and a stainless machine screw to secure the dip-stick and I had one for the coolant overflow too. :)
http://i1126.photobucket.com/albums/...stall001-1.jpg
http://i1126.photobucket.com/albums/...h_ICC20121.jpg

I don't usually monitor coolant temps from under the hood though. :dunno:

^ :icon_tup: ps pump is up next. :)