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Here is one possibility but cant find temp or pressure specs.

https://www.motion.com/products/sku/04883066?rrec=true

Yes, specs would be nice. I always love an illustration showing measurement points and then providing no numbers. Of course with an A to B distance on a container you know it will fit.

Nice fine, might have to write for specs.

Richard

 

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Ordered in Candy Red. Of course.

Rob,

Sometimes when you, Gadget and John get going on the wonderful additions to these cars I am reminded of Jack Nicholson, as The Joker, in the Batman series movies where he muses, "Where does he get all these toys?"

This stuff only keeps getting better. The rabbit hole entrance is this way...(and there goes the morning). Thankfully there are rainy Saturdays!

And I just replaced Elsie's surge tank with new OEM. Damn, saved $140.00 but got translucent plastic. Sigh...

Richard

 

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Also there is this from DDM works but they have welded a nut on their tank.. sigh

Sight glass for Polaris Slingshot Coolant Tank by DDMWorks-D

www.ddmworks.com

If you go to the Amazon link Rob posted, you will see sight glasses also listed in the surrounding "look at this other similar stuff " side pieces. If you were concerned about blowing out a sight tube, installing one, or two (upper level/lower level), sight glasses would be an alternative. Seems it would depend upon the thickness of the tank metal to accept drilling and tapping for screwing in the sight glass. Another option, provided the threaded portion is long enough to place a nut on the inside and an o-ring outside (?) for sealing, the sight glass should be very easy to install. Given acceptable tolerance to pressure and temp, the tube is visually more accurate, but two sight glasses could serve the same purpose. Think about the oil level sight glasses used in motorcycle crankcases, visually, for example.

My 1.999 cents worth.

Richard

 

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On Gadget's finger in the tank approach...

While I do have long fingers, I might choose to:

Go through the cap opening with right angle long needle nose pliers inside the tank holding the nut...thinking about where you want the sight glass(es) and have drilled your entry hole. Then insert the sight glass, with an appropriate seal and washer, if needed, to thread into the nut. Notice the sight glasses have six-point bases to allow tightening down. At least that's how I'd do it...I think.

An alternative is to have a .25 aluminum plate welded to the side of the tank, drilling and threading there...or the bung idea John mentioned would surely work as well.

Standing away from the screen now.

Richard