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Posted by: ricardo Dec 4 2016, 09:07 AM

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

Posted by: Frankvw Dec 4 2016, 04:27 PM

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!

Posted by: ottox914 Dec 4 2016, 04:36 PM

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.

Posted by: pete000 Dec 4 2016, 04:46 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.

Posted by: cary Dec 4 2016, 09:08 PM

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.

Posted by: bdstone914 Dec 4 2016, 10:05 PM

Or use a water spray bottle and squirt suspected area. Idle will drop when it sucks in water.