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Ben Lipman Goo Roo SA Soarer TT manual, plus TT track car, plus a spare shell
Posts: 3635 Reg: 04-2006
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Saturday, January 18, 2014 - 05:14 pm, by: Ben Lipman(Ben12a)
Cheers Michael. We are still pursuing it.
Got the car off the trailer and into the garage today. Warmed the engine up and did a leak down test on all cylinders. The results were a little surprising, so I redid the compression test with the motor warm.
I was hoping to find a smoking gun. I did not. I am now more confused as to what the noise is. Basically all cylinders have 20% leakage, which is at the low end of the 'good' scale. All cylinders have 150 psi (hot) except number 6 which has 130 psi. So compression is still low in number 6, but the leak down test doesn't show a leak.
Is it possible that there is a leak via the valve before the cylinder hits TDC? Like it is a bit sticky and the compression helps close and seal the valve?
