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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications Leak down test results
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      07-15-2022, 11:11 PM   #1
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Leak down test results

Here we go boys…

1 5% - pistons
5 6% - pistons
3 5% - pistons
6 5% - pistons
2 20-40% exhaust port front valve, back valve good
4 7% - pistons

What are your thoughts… considering my next steps

This was done on a cold motor so I expected to see some leakage from the valve cover since the piston rings weren't expanded and warm but that front exhaust valve is definitely leaky…

I know the motor isn't 100% but is it good enough to go on until I can rebuild a replacement?

I did not do a compression test and went straight to the leak down because the car has no turbo on it so I cannot turn it over…
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      08-08-2022, 08:43 AM   #2
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