 Vacuum leak, Detection |
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| ricardo |
 Dec 4 2016, 09:07 AM
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#1
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Newbie  Group: Members Posts: 47 Joined: 9-November 16 From: Lakeview, NY Member No.: 20,572 Region Association: North East States  |
Finally got engine running but I suspect vacuum leaks. Was wondering what the best way is to detect vacuum leaks without a smoke machine? Mi hu
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| Frankvw |
Dec 4 2016, 04:27 PM
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#2
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working on my first 914 ! Group: Members Posts: 653 Joined: 13-April 16 From: Holland, the Netherlands Member No.: 19,896 Region Association: Europe |
 for example with a vacuum tester tool. You can find them under 20 bucks which will be fine to test the hoses. You create a vacuum pumping air out while the other side is plugged and watch the gauge if you keep or loose the vacuum. you can also buy (instead of a tool) 20 bucks worth of vacuumhoses and replace the old ones.20 bucks will not be enough to replace them all. Keep in mind you cannot just use any hose for the stronger-vacuum ones.... good luck! |
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| ottox914 |
Dec 4 2016, 04:36 PM
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#3
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The glory that once was. Group: Members Posts: 1,302 Joined: 15-December 03 From: Mahtomedi, MN Member No.: 1,438 Region Association: Upper MidWest  |
Do you like cigars? They make excellent smoke machines.
You can use a propane torch, unlit, set to a low flow rate to hold in the areas you think you have a leak. RPM's go up, you found your leak. |
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| pete000 |
Dec 4 2016, 04:46 PM
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#4
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Senior Member Group: Members Posts: 1,887 Joined: 23-August 10 From: Bradenton Florida Member No.: 12,094 Region Association: South East States |
I made a smoker out of a paint can. Lots of how to do videos on You Tube. They also sell them on ebay if you don't have the time.
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| cary |
Dec 4 2016, 09:08 PM
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#5
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Advanced Member Group: Members Posts: 3,900 Joined: 26-January 04 From: Sherwood Oregon Member No.: 1,608 Region Association: Pacific Northwest 
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QUOTE(pete000 @ Dec 4 2016, 02:46 PM)  I made a smoker out of a paint can. Lots of how to do videos on You Tube. They also sell them on ebay if you don't have the time. What Pete said. Easy deal ..................... I built mine for a leak investigation on a 4.0 Ford. But we'll rework it for testing D-jets when we finish up Mark and Mike's engines. |
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| bdstone914 |
Dec 4 2016, 10:05 PM
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#6
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bdstone914 Group: Members Posts: 4,887 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Or use a water spray bottle and squirt suspected area. Idle will drop when it sucks in water.
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