Quote:
Originally Posted by Alvy
What?!? Really??? Leak down tests and testers have been around a lot longer than 15 years. This supposed waste of time according to you will tell you exactly what's going on inside the cylinder whether it's a single cylinder or Multi cylinder engine, period. A compression test will reveal a weak cylinder but a leak down test will tell you way more about what's making it weak.
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I know they have been around longer than that Mike..... but they didn't start showing up on "book" tests until just the last couple years.
No, they don't tell you anything more about an engine. Like Don said, a rubber tipped blow gun in the plug hole is as effective as a leak down test. The leak down test does not "tell" you anything except that the cylinder looses pressure, and how fast. It doesn't jump out and say it's a valve, or rings, or whether it's intake or exhaust.
IT IS A COLOSSAL WASTE OF TIME. (Almost as much as debating this.) Blow gun, 5 seconds, it's done. I can pull the head off of a Kohler faster than anyone can run a leak down test on one. Now, if I had a $9K pulling engine and I wanted to monitor the wear (like Don stated) yeah, I'd do one. That's about the only time I would ever consider it. Do them if you want. Not me.