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      12-16-2012, 12:17 AM   #17
m7ammed's Avatar
Saudi Arabia

Drives: 335i
Join Date: Nov 2008
Location: Saudi Arabia

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Originally Posted by threewirefire View Post
The intake valve cleaning is not that big of a job. The only primary component that has to be removed is the intake manifold. After that comes the tedious task of cleaning each port where the valves are closed then rotating the engine over and cleaning the next set of closed valves. The cleaning procedure has to be done when the valves are closed so all of the carbon gunk and cleaner doesn't get washed into the combustion chamber. Most dealers charge the labor time for r&i intake manifold plus an additional 1.5-2 hours of labor for the cleaning.

Do you recomend I change everything, coils plugs anf injectors? Or just replace the defective ones?