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      12-07-2012, 01:14 PM   #35
Phil325i's Avatar
United Kingdom

Drives: E92 325i MSport Coupe
Join Date: Apr 2012
Location: UK South East

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Originally Posted by idnan View Post
I did a manual clean on mine with a set of rifle cleaning brushes a month or two ago. My car has done about 85k, with me doing the last 25k of them modified. My valves had hardly any carbon buildup on them at all. I don't know if it was a combo of the fact I drive my car hard, have an OCC, occasionally run meth and have had a new valve cover fitted recently. I heard a 135i race car had a valve cleaning done on the other side of the forum and despite average mileage, the valves were pretty clean.

The process didn't take too long because they weren't too bad and honestly speaking, it felt exactly the same and it still has a very slight stutter on idle.

Oh and I managed to completely ruin my hoover in the process.
I reckon your OCC is your saviour...
E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; BMS clutch stop; BMS CDV; RE g/box mounts; Saikoumichi OCC; K&N; Cyba scoops; BMW Perf Exhaust; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front