[mention]80stech [/mention] [mention]andrewwynn [/mention] Either of you or anytime else seen where an M54 head won't hold timing? I do the BMW timing procedure in ISTA, put the head faceplate special tool on, torque the bolts to 5 then 20 Nm, rotate crank by hand 2X, then try to put blocks back on the end of the cams, and it's off again, intake by 2.3 degrees this time, exhaust by 0.3 degrees. Did this 3 times.

I left it in time and checked compression, and it's 145 on cylinder 1, with a 90% loss on the leak down test. Still crank no start, although some of the injectors leaked, so I'm fixing that now but it doesn't even try to start.

I'm seriously thinking about buying a used head with all the valves in it.

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Donald Foss
2003 E53 3.0i, 5L40e (for now)
- self-rebuilt engine, valves, SL oil pump
- ported heads, both sides
- N55 intake manifold, 70 lb injectors
- GTX 2860R-clone 60mm top-mounted turbo
- progressive slip diff
- under chassis cats
- extra sensors wired to Arduino
- 15" touch screen dash-mounted