Hello everyone... Something a little different here today. This isn't a how-to aimed at fixing something particular on your DeLorean. Rather it's a how-to to make a device to help you ferret out nagly little leaks in your engine... The dreaded VACUUM LEAK!
Now there are machines available to do this but they are expensive to buy. You may be able to rent one in your area. The third option is presented here - Build your own. I built this one for less than $25. Of course that doesn't include the cost of an air compressor which you will need but there are inexpensive alternatives like the little 12 volt ones that will work just fine.
Here we go...
All the materials you will need.
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(Counter-clockwise starting with the bucket)
2 Gallon paint bucket (It remains to be seen if this will work - It's possible the plastic may be problematic with the heat)
10' of vinyl tubing - 1/2" O.D. x 3/8" I.D.
5/8" Cut washers (I bought 3 but only ended up needing 2)
3/8" x 3/8" Brass adapter
1/2" x 3/8" Coupling flare
1/2" Cut washers (I bought 3 but only ended up needing 2)
1/2" x 1/4" Reducer
1/4" x 1/4" Universal coupler
I'm lucky enough to have a central air system but none of the connections had regulators on them so I bought one. You won't need to if your compressor has an easy to access regulator.
Making the Lid
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As you can see the brass fittings are tapered so we have to make up some slack. That's what the washers are for. They also help make for a tighter seal.
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If you size your drill bit correctly you will have to work to get the fittings in which should help make things nice and sealed.
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Now for the coupler on the bucket.
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And here's how everything looks together.
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...and the new regulator.
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So... from here the idea is to add some sort of combustible to the inside of the bucket. That's what makes the smoke. I have seen it done two ways.
- One involved a charcoal briquette that you heat with a propane torch to get it going. You then place it inside a glass container of some sort and add a few pieces of heavy cardboard on top. The heavy cardboard is slow to ignite so it just smolders and makes smoke. I'm a little concerned with the amount of heat this method makes and how it will affect my plastic bucket. If I had gone with metal it would be less of an issue but I couldn't find a metal can with a lid that was easy to take on and off - a paint can would require a mallet to put on and a screw drive to remove. Could be an issue if the fire got out of hand.
-The other method involves using a wick from one of those backyard tiki torches. You shove it on the end of a soldering iron and soak it in baby oil. The iron heats it enough to get it smoking.
Regardless of the method - the the air enters the bottom of the bucket and exits the top carrying the smoke with it.
That's it for now. I'll be back hopefully some time this weekend with more pics as I test the smoke generating methods and the eventual search for vacuum leaks on my car.
Please stay tuned...