Lee, thanks for the reply. I'll check out the Snap On camera. Looking to see what a 300,000 mile engine looks like. It has been treated for quite awhile with Orion 5000 EL. It is a synthetic engine and fuel lubricant.

Can anyone tell me what the opening size in mm is of the spark plug hole on the 94-850 turbo 5 cyl is? I'm looking to buy a snake camera with a 9mm cable in order to look inside the hole. In other words will the 9mm fit? Thanks,