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Steve Tinker · 03-05-2016, 06:40 PM

How much oil did you put in the engine when you replaced it? If you have hydrolocked a cylinder, you would have put a lot of "extra" oil in the sump...
The clunk you heard when you switched off the engine is not a good sign. Now the plugs are out, it will pay you to try to do a compression test, turning the engine on the starter motor. And yes, you should be able to turn the engine by hand without the plugs in place, but I suspect the damage has already been done, if it was caused either by overfilling or a blown AOS.

03-05-2016, 06:40 PM	#5
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	How much oil did you put in the engine when you replaced it? If you have hydrolocked a cylinder, you would have put a lot of "extra" oil in the sump... The clunk you heard when you switched off the engine is not a good sign. Now the plugs are out, it will pay you to try to do a compression test, turning the engine on the starter motor. And yes, you should be able to turn the engine by hand without the plugs in place, but I suspect the damage has already been done, if it was caused either by overfilling or a blown AOS. __________________ 2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley. 2001 MV Agusta F4.