[335i 07]

Can't find any good info on how to get my AT 335i pistons to TDC for a valve cleaning. Do I just turn the crank by a nut? Where is the nut? Do I have to take the plugs out? Car in neutral? Any help would be great.

[KyLu II]

You can turn the crank with a wrench.
they way i did it, I unplugged the coils and taped the start button as if I were to start it. Don't hold in the button just a tap*
I don't recommend this method tho, but is what I did n worked...

[335i 07]

Did you clean the valves as well? You method seems legit. Can anyone else chime in on this?

[ErvGotti]

Originally Posted by 335i 07

Did you clean the valves as well? You method seems legit. Can anyone else chime in on this?

I've never done it on the N54, but on the Diesel generators I work on this is how we get it to TDC for tune up's. Just make sure it is relatively free spinning (it will be a little tough to turn) and go clockwise, if it doesnt turn over do not force it.

[KyLu II]

Originally Posted by 335i 07

Did you clean the valves as well? You method seems legit. Can anyone else chime in on this?

Yea some 2-3 months back. I was able to close the open valves, it moves very quickly but I was able to do it. Having a second set of eyes always help

[mithiral67]

Sub

[335i 07]

Originally Posted by KyLu II

Yea some 2-3 months back. I was able to close the open valves, it moves very quickly but I was able to do it. Having a second set of eyes always help

Did you turn it left?

[raceyBMW]

Just have someone tap the start button while you are looking at the way the crank pulley spins...this is the direction you want to turn the crank pulley.

Set parking brake, put the car in neutral, pull the spark plugs (it will ensure their is no compression in the cylinders), squirt some oil in the cylinders, and it should be relatively easy to turn...it was in my E34 with 2 more cylinders. Not sure if you can get to the crank bolt from above, if not you will probably need to put it up on jack stands or ramps to get at it from below.

[335i 07]

Anyone got the socket size for the crank pulley?

[2wheelsrbetter]

22mm

Originally Posted by 335i 07

Anyone got the socket size for the crank pulley?

[MilehighM3]

Always turn it clock wise. Also tere will be multiple cylinders at or near TDC so you can do 2-4 cylinders at a time. Just take a good look in there and then clean away. It will reduce the amount of engine turn overs you need to get the job done and make it go much quicker. Having the engine hot will make the cleaning easy as well, FYI...

[335i 07]

I just ended up hitting the start button and was lucky enough to get three ports shut at a time. I could not reach the bolt on the crank so this was the only method I was left with. If you do use the start button disconnect the electrical connector from the coils. Make sure area is clear of rags and other object that my suck into intake. That would make things very expensive.