Cylinder head, valves, leak check S14

# Checking valves for leakage

Remove cylinder head |
Turn head upside down, with spark plugs still installed. |
Fill combustion chambers with gasoline or a similar thin liquid. |
WARNING: Do not use Silicone fluid, this will lead to oxygen sensor damage after installation of cylinder head.
If liquid runs past the valves, inspect valves and valve seats. |
Remove and install valves |
If required, machine valve seats |

E30 M3 Repair Manual V2.7. Copyright ©1999-2001 Koala Motorsport & Brett Anderson