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  • Users: Dave21426
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  1. Dave21426

    Smoke tester

    Thank you.
  2. Dave21426

    Smoke tester

    Forget the diagram I sent you with the bladder, its a hybrid. Regardless, if the intake purges the fumes you have to have a vent. On my car that valve is in the air cleaner and brings fresh air thru the evap system. All smokers pressurize the evap system. read the manual I attached. Also watch...
  3. Dave21426

    Smoke tester

    Ok that PDF is for a hybrid, hence the bladder. Depending on the purge conditions they may not go thru the tank, just the canister, what is your point?
  4. Dave21426

    Smoke tester

    Thats a generic diagram, hence where you are getting the term bladder but if you look at page 3-13 do you see where fresh air is coming in thru the tank and out thru the intake. My car has the CCV in another place. Different manufactures call it different things. Regardless, its fresh air into...
  5. Dave21426

    Smoke tester

    Bladder, what are you talking about here. Smokers inject smoke into the emission service ports (usually under the hood of the car).
  6. Dave21426

    Smoke tester

    The CCV is normally open, ie car off, it vents to air. Car started it closes and creates a vacuum in the system. When the system purges it needs to open to release the vacuum, like the vent on your gas can or pool chlorine jug. Quick education: http://www.autoshop101.com/forms/Hybrid13.pdf I...
  7. Dave21426

    Smoke tester

    In a round about way yes. They want to use nitrogen (some manufaturers). 1st Air is 78% nitrogen 2. if you are buring mineral oil to get smoke you must need air for combustion 3. Gas and air are mixed together in an auto fuel system via the CCV all the time.
  8. Dave21426

    Smoke tester

    The original question pertains to the emission control system. The closed Canister Valve is part of that system along with fuel and fuel vapors. When you put a smoke tester into the CCV valve or anywhere in the emission system..... then open the FUEL tank cap, what do you think will come out?
  9. Dave21426

    Smoke tester

    I wonder if you could close the purge valves and let the car pull a vacuum on the emission system then monitor it with a vacuum gauge. Seems simple and safe.
  10. Dave21426

    Nitrogen and Fuel

    That is an interesting thread. Still with the use of nitrogen you have to air somewhere in the system to create the smoke, an element to ignite the mineral oil(which to me is the actual danger). Asphyxiation in a ventilated shop environment would never happen. If you were in the car with the...
  11. Dave21426

    Nitrogen and Fuel

    Matt, I emailed those companies and they have not replied. Guess they dont want to be locked into that question. The emission system is (fuel system) has air and fumes all the time. When it purges it introduces AIR into the system. Any ignition source, smoker or not will create a bomb. Emission...
  12. Dave21426

    Nitrogen and Fuel

    This company uses compressed air in their smoke systems. Guess its not a problem. http://www.youtube.com/watch?feature=player_embedded&v=ztKF5Xz5dWk
  13. Dave21426

    Nitrogen and Fuel

    Ford Engineers are just on edge after the pinto incident and F-150's that blow up.
  14. Dave21426

    Nitrogen and Fuel

    "air and gasoline vapors can form an explosive mixture"....Really? I guess that was the day I slept in my college chemistry glass. "Air" is not only in an auto fuel system but fresh air is introduced via the purge valve not to mention the fuel cap and fuel changes. I have a coleman lantern that...
  15. Dave21426

    Nitrogen and Fuel

    I posted a question over in the auto fuel section but would like to know from the Chemical Engineers exactly what problems (if any) arise when intoducing air to gasoline vapors. The companies that make these testers have a warning against using air but I dont see the problem especially since all...
  16. Dave21426

    Smoke tester

    I have noticed that some emission control smoke testers warn against using a supplied air source to test for leaks within the fuel system. They are afraid that the oxygen, as low as it is in air, with ignite some how with the fuel and blow up the car. They recommend an inert gas like argon. But...
  17. Dave21426

    Sealing a tight fit

    A sleeve with .00025 wall, good luck with that. Loctite 200 series is the only stuff like wicks so I may try that. Back in the day, 1940's, they used 600w oil but I am not sure where to buy a small amount of it.
  18. Dave21426

    Sealing a tight fit

    Well 609 has a low viscosity, that would be a good thing. Corypad, yes the intermediate gears turn but in this case the intermediate gears have needle bearings that ride on the shaft. The shaft just supports the stuff. Common place for non syncro transmissions pre-60's.
  19. Dave21426

    Sealing a tight fit

    Of those 3 loctite which would be best for this application. They look similar in nature. mfgenggear, I had the same idea but dont want to take it apart.
  20. Dave21426

    Sealing a tight fit

    I tried RTV, too thick. The intermediate shafts are stationary, gears have needle bearings and the gears rotate and slide back and forth on the shaft via the shift forks. Ever have an old erector set?

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