Time to find a new place to service the sled. If he has never heard of doing leak down on a 2 stroke he should go be a greeter at wal mart because his current job has outpaced his knowledge.I talked to another service manager today and he said how he’s never heard of a leak down test on a 2 stroke snowmobile. He has heard of doing them on 4 strokes. Does the leak down test go by a different name? Maybe I’m describing it incorrectly
There is nothing hard or technical about doing leak down tests. It is just a more accurate measurement of how much is getting past the rings because the engine is static while testing. Compression test requires turning the engine over to get results. That is where it starts going wrong with regards to results. There are too many variables that can mess it up.
On four strokes they do leak down mostly to confirm valve seal because that is a more common failure point than rings. 2 strokes do not have valves and the procedure is for ring seal. Different in that way but the procedure is the same and in both cases the results are much more useful than compression tests.