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Haloruler64's 2000 MR2 Spyder build thread  

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dev
 dev
(@dev)
Just a member. Moderator

Thanks for showing us a smart way of diagnosing. In time all of these little plastic and rubber fittings will fail and I always thought diagnosis in this area is a nightmare.

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Posted : April 28, 2020 8:59 am
haloruler64
(@haloruler64)
Honorable Member

Haha the gasket is cheap. I'm just trying not to throw money at parts that aren't bad. Plus the smoke machine can be used in the future, borrowed by other local Spyder owners, etc. 

$60 or so on eBay. Want a link? It's done a good job so far despite being a little "homemade." Well made though! I considered inviting some weed smokers over but... all the smoke might have hurt my diagnostic abilities. Or improved them. I haven't decided. 

2000 Toyota MR2 Spyder, 2017 Lexus CT200h F Sport

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Posted : April 28, 2020 9:21 pm
CSPIDY
(@cspidy)
Estimable Member

Yes on the ebay link, one tool that would be nice to have. For that price if I buy and never need it will be money well spent. Like voodoo you do something’s to ward of other things from happening.

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Posted : April 29, 2020 7:59 am
haloruler64
(@haloruler64)
Honorable Member

Sure thing, here ya go. Uses baby oil https://www.ebay.com/itm/EVAP-Smoke-Machine-Diagnostic-Emissions-Vacuum-Leak-Detection-Tester-NEW/221913989725

2000 Toyota MR2 Spyder, 2017 Lexus CT200h F Sport

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Posted : April 29, 2020 8:47 am
haloruler64
(@haloruler64)
Honorable Member

RIA, I did exactly as you said. Hopefully this works! 

I grabbed a $7 gas cap from O'Reilly Auto along with a $5 set of hose barbs. I took the cap apart: The white part is what actually seals, while the black part is just the cap that ratchets on the white part. There is no seal between the black and white parts. First I gutted the seal from the inside of the white part so there's a hole in it.  

IMG 20200429 163223

Then I drilled a hole in the cap and inserted the correct size barb. 

IMG 20200429 170320

Then I threw on some tape and reinforced the top with JB Weld.

IMG 20200429 190320

I filled the area around the barb inside with black RTV, since it should be fairly chemical resistant. I then laid down a bead of the stuff into the black cap and reinstalled the white section. Afterwards I filled the area with RTV. 

IMG 20200430 003022

Final result! Sealed gas cap that will let smoke into the fuel tank without venting it out. Yes the ratcheting mechanism doesn't work anymore, so installation will have to be careful. It's only held together with RTV. But it only needs to seal well enough to hold a couple PSI at most, the smoke tester self regulates to one PSI. I'm excited to try it! $13 total.

IMG 20200430 002927

2000 Toyota MR2 Spyder, 2017 Lexus CT200h F Sport

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Posted : April 30, 2020 7:16 am
CSPIDY liked
haloruler64
(@haloruler64)
Honorable Member

The cap seems to have been a waste of time, leaked around the edges. 

2000 Toyota MR2 Spyder, 2017 Lexus CT200h F Sport

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Posted : May 17, 2020 12:35 am
RIA
 RIA
(@ria)
Eminent Member

@haloruler64 Ahhh I was so hype too! Sorry to hear it didn't work out. Another idea, maybe buy a large diameter cork from ace hardware and put a hole through it? Or, you could get a flat rubber gasket and put it on under the cap. Idk. Hope you get this smoke test thing sorted out soon.

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Posted : May 17, 2020 8:45 pm
haloruler64
(@haloruler64)
Honorable Member

In my quest to spend even MORE money on this, because I'm not broke enough, I picked up this. It's relatively cheap. https://amzn.to/3dOGtwK

Thanks RIA

2000 Toyota MR2 Spyder, 2017 Lexus CT200h F Sport

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Posted : May 17, 2020 9:04 pm
dev
 dev
(@dev)
Just a member. Moderator

It just amazes me the kind of stuff you find on Amazon these days.  I never know some speciality items even  existed. 

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Posted : May 17, 2020 9:18 pm
RIA
 RIA
(@ria)
Eminent Member

@haloruler64 hahahaha that's perfect. If you have leak issues still, try putting some grease on it or wrapping teflon tape around it before pressure fitting it into the opening. Looks promising. Hopefully it is the advertised size 

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Posted : May 17, 2020 9:45 pm
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