Cylinder number 4 - no compression at all. Zilch. Nada.
I'm quite confused about what would cause zero compression on one cylinder, on a fairly new diesel.
Timing belt slippage highly unlikely. I've had an initial look, belt seems in good shape, and taught - and if it slipped enough to destroy a valve, it would have taken more than one cylinder out!
Being a diesel engine, I would think valve burnout or seat recession would be extremely unlikely.
The only hypothesis I can come up with at this time, is that something (bit of the end of a glow plug / swirl flap if this car has them) has dropped into the cylinder.
It's worthy to mention that the compression tester I have is really for petrol cars, and I used it in the injector holes, so I couldn't get a decent reading for pots 1-3 - as the diesel compression is so much higher than a petrol car is was trying to blow the tester out of the hole.
But, the test was enough that I can tell beyond doubt, that pot no4 is goosed.
I've taken the turbo pipe off, there doesn't feel to be any missing blades, and the turbo spins freely without undue play.
What tree should I bark up now?
I hardly ever work on cars these days, and I struggle with confidence with anything that's not an Omega V6, so apologies in advance if I ask lots of questions!
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