Sorry about the simple question, but my Haynes manual is in my friend's garage and I can't get ahold of him.

I have my valve cover off and everything but I forgot which valve is the intake and which is the exhaust...

Could someone please fill me in on which is which if I am standing in front of the car looking down at the engine.

Thanks in advance...Joe

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1987 250D
1984 300TD
1983 300D
2002 Chevy 2500HD Diesel
1995 Dodge 12 valve Cummins Dually
All Biodiesel Powered