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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22727
Experience:  BEng hons Mech engineering, in auto industry 22 years
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There have a Porsche Boxster 2.9 2006 very low compression

Customer Question

Hi there have a Porsche Boxster 2.9 2006 very low compression on all cylinders 50-70 psi
One at 120.
Done a leak down test seems to be leaking past inlet and exhaust valves yes I had each piston up on each test.
Just seeing if you have any advice common fault or not.
Submitted: 2 years ago.
Category: Car
Expert:  Matt replied 2 years ago.
Hello to have all the cylinders this low I'd say its likely that the cam timing has slipped and you've had valve to piston contact on 5 out of the 6 I'd suggest a borescope / endoscope inspection would be the ideal next step if you can, going in though the plug holes, however access being tight this may not be possible this should show if the valves have touched so you would know whether or not to strip the engine