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Smoker for detecting vacuum leaks?
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#1
12-30-2025, 03:16 PM
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Smoker for detecting vacuum leaks?
I'm in the process of putting the '70 911 back together and before I install the engine I wanted to try and identify the issue where the RPM gradually increases once warmed up. Things are pointing to the WUR or a vacuum leak somewhere and wondered if anyone had tried a smoker or some other solution for tracking them down. Any advice appreciated!
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-Fritz '93 C2 Cabriolet - That cool Amazon Blue-Green Metallic color '70 911T, sorta - '70 Chasis, '77 shortnose, 3.0L CIS engine, and SC fenders 
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#2
12-30-2025, 06:50 PM
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I fought with some vacuum leak issues in our E36 two summers ago and bought this smoke machine which immediately found the problem. I regret not buying it sooner.
https://www.amazon.com/gp/aw/d/B0CGX...6-d7de6607977f It's more expensive than others (I'm not sure if it had extra parts or not) and it doesn't have the smoke oil which isn't that expensive. I'm happy to have bought it and, if nothing else, I think smoke machines are worthwhile tools for anybody with an old car.  BB.
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Some say "My car is a Porsche!" I say "My Porsche is a car!" and I drive the hell out of it. '87 Porsche 944; '10 BMW 328i xDrive (her's); '98 BMW 323is (ours)
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#3
12-31-2025, 10:22 PM
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I have the same smoke machine as @BeerBurner, and it worked quite nicely.
You are welcome to borrow it, if you feel like driving out to Silver Spring one day.
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2016 GT4 warp 7 1999 SPB warp 2, maybe 1973 914 2.0 1/2 impulse now out of space dock! Previous: 1973 914 1.7 1/4 impulse 2012 Cayman R warp 4 2006 Cayman S warp 3 1999 SPB warp 2, maybe 1966 911 warp 1.5
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#5
01-01-2026, 12:25 PM
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I thought the best smoke machine for air-cooled 911s is Charlie Murphy
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David D. '87 Targa - 2024 was the year, beeches...
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#6
01-02-2026, 12:38 AM
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Quote:
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Peter (not "Pete") K. 2026 Lucid Gravity Grand Touring (EV Tow Vehicle) 1997 Spec Boxster #671 2016 Cayman S 2016 Toyota Highlander--wife's DD 2017 VW GTI SE (DD) Gone and missed: 2003 Miata ("SM") race car 1992 Miata ("SSM") race car 2009 911 C2S Coupe 2004 Toyota Prius - sold to son's girlfriend 2006 Dodge Durango 2003 Acura MDX 86 Black 911 Coupe race car 86 Gold 911 Targa 82 WineRedMetallic 911 Targa
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