Evap Service Port Adapter

[u118224]

I built a smoke machine and want to check for a large EVAP leak code on a 2008 Impala (probably gas cap leak). The cheapest I can find is the OTC CEA04 @ $39. Are the Evap Service port fittings a special size?

 

[mikeselky85]

im sure that it should be the same size as gm fuel pressure shrader adaptors.....i know we have the fitting at work cause i use it alot

 

[BRTM]

I built a smoke machine and want to check for a large EVAP leak code on a 2008 Impala (probably gas cap leak). The cheapest I can find is the OTC CEA04 @ $39. Are the Evap Service port fittings a special size?

The only time I see a large evap leak on an Impala is the vent valve. You can tap into the system in other places you don't have to use the schrader port.

 

[Fedwrench]

Are you sure you have an evap test port? Manufacturers did away with them so as not to have another possible leak source. We use adapters placed in series now.

 

[mikeburris]

Fyi the evap port is not the same as the gm fuel schrader valve, I have tried.

 

[Murphy4570]

A/C schrader valve tool fits those. Remember that they are left hand thread.

 

[u118224]

Thanks for all of the replies, I appreciate it!

 

[skulldrinker]

Does someone want to tell me why this little critter is $40? and is there a home made version that anyone has come up with?

 

[CrackedHead]

Anyone out there ever come up with something for this?

From what I see the thread appears to be M12x1.25.

So I think this would work:
Metric Fitting M12 M12X1.25 Female X Barb 3/8” 10mm Air Fuel Gas Oil Boat EG
http://www.ebay.com/itm/like/162302701122?lpid=82&chn=ps&ul_noapp=true


But it doesn't have the oring or a seal in the top of the fitting.

I would really like to find the fitting they are using with this guy as it pushes the schrader valve in when you screw it in.:

http://www.oreillyauto.com/site/c/d...ck=Search_N0980_1187568_-1&pt=N0980&ppt=C0192

Anyone have any suggestions?

 

[DeltaWye]

The only time I see a large evap leak on an Impala is the vent valve.

That's what it was on my Grand Prix and the part is so cheap and well-known to fail, in this case it's worth doing a parts-swap to see if it fixes the problem.

edit: To confirm it's the problem, you can just put 12 volts to it and listen for if the solenoid activates.

 

[CrackedHead]

For anyone that wanted to know about this, it is in fact the same thread as a R134a hose. I used an old feed hose I got from a friend, tested the threads, and then cut the hose in half. I now have a nice test port adapter.

 

[Mastermind]

i used to pull the core with an a/c core tool, then use a female air fitting and plug the hose onto it. 1/4 npt?

 

[jsaw]

Take the core out, then find a piece of flexible hose that slips over the fitting. Our smoke machine has a metal cone on the end of the hose that seals to the flexible hose

 

[skulldrinker]

Evap port adapter kit for smoke machine leak testers. Smoke test nozzle adapter
$16.99 with schrader valve removal tool included.


https://www.ebay.com/itm/222229593540

 

[CrackedHead]

That's a good find also.