Valve cover

[porschedavid]

2005 Porsche996 c4s
HI
Want to reseal valve cover and change spark plug o rings.Can i just unbolt the valve cover or do i have to lock the timing up.In the later 3.6 engine i thought the camshafts is held on under the cover.So no need to lock timing.

[JFP in PA]

Originally Posted by porschedavid

2005 Porsche996 c4s
HI
Want to reseal valve cover and change spark plug o rings.Can i just unbolt the valve cover or do i have to lock the timing up.In the later 3.6 engine i thought the camshafts is held on under the cover.So no need to lock timing.

You are wrong, the cam cover holds the cams in place. You need to lock the engine at TDC, and install cam retention tools to hold the cams in place and prevent the valve spring pressures from breaking them. You need to do some research and acquire the tools you need before even attempting this. You need the tooling normally used when replacing the timing chains: