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BMW · Diagnostics

BMW N54 Leak-Down Test

I'm doing a leak-down test on a BMW 335i N54 to get a better idea of how well the cylinders are sealing.

335iApr 18, 20212,090 views
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What you’ll see in this one

Before tearing into an engine, it's useful to gather evidence. This video shows one of the tests you can use.

A closer look at this job

An engine leak-down test can provide another piece of information about how well the cylinders seal. Here I'm using that test on an N54-powered BMW 335i. The point is to understand what the test involves and how results fit into an engine-condition investigation, not to judge an engine from a single number alone.

What the video covers

  • Setting up a leak-down test on the N54
  • Reading cylinder results
  • Using the test to evaluate engine condition

Related searches

BMW N54 cylinder leakdown335i leak-down testN54 engine health testBMW compression vs leak downcylinder sealing test N54

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Parts and topics mentioned

Topics mentioned

Setting up a leak-down test on the N54, Reading cylinder results, Using the test to evaluate engine condition

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