Quote:
Originally Posted by cheshired5
On a running engine, you can check the vacuum pump directly with a tester with the brake booster attached and again with the brake booster connector removed but the brake booster hole on the vacuum pump securely blocked off.
If the result is the same steady, full vacuum, the booster vacuum seals are fine.
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I’ve just changed the crank case breather valve, part no 8642424, transformed the breathing and pressure. I guess this had caused excess pressure that resulted in oil being forced into the combustion process and causing issues with the DPF filter. Now to clean that!