[Wazman999]

Morning guys

I have a 2009 320d (N47)

My crank pulley (harmonic balancer) needs replacing - see photo....

I simply cannot undo the bolts...

Ive tried but it just spins the engine. tried impact gun no luck

Ive been advised to do it in 6th gear (manual) so the engine cant spin

The only threat i can find says to lock the engine with an allen key but that was a 335 engine, not my 320d N47....

Any help greatly appreciated

[Serf27]

They sell locking pliers with a chain on the end of them that wrap around big round things and hold them in place.
That will work.
Maybe some rust penetrant too.

[relative4]

A chain wrench will mar the pulley. That's fine if you're throwing it away, but for installing the new one, a strap wrench is better.

[relative4]

Maybe this?
https://www.ecstuning.com/b-genuine-...UaApW2EALw_wcB

[E92William]

Originally Posted by Wazman999

Morning guys

I have a 2009 320d (N47)

My crank pulley (harmonic balancer) needs replacing - see photo....

I simply cannot undo the bolts...

Ive tried but it just spins the engine. tried impact gun no luck

Ive been advised to do it in 6th gear (manual) so the engine cant spin

The only threat i can find says to lock the engine with an allen key but that was a 335 engine, not my 320d N47....

Any help greatly appreciated

I think a possible way you could do this is have a breaker bar with a socket and put it on one of the bolts, then keep the breaker bar in place maybe someone hold it or make it get stuck against the chassis whatever it takes to keep it from letting the engine turn. Then go around trying to undo the other bolts with another tool. for your own good and mental health.. soak those bolts in penetrant every 10 minutes you spent search on the forums also make sure the sockets are very well seated, you don't wanna strip one of those

[nsjames]

I am unfamiliar with that engine.

but on most things I would pull the starter a and jam a big pry bar into the flywheel teeth while a friend undid the bolts.

[mweisdorfer]

Kroil oil - soak them for 24 hours

Torch - yellow gas...

Also, I would not replace them with OEM bolts. You can get SS bolts to do the job. You just need the thread count

The problem is that e-Torx strip very quickly.

So, you will need back up plan for sure.

Irwin makes a good stripped bolt kit.


IRWIN Bolt Extractor Set, 5-Piece (394002) https://www.amazon.com/dp/B000QW6K8I..._admFEb9P4QWJK

Or find a small cutting tool for a dremmel you can get in there and sheer the bolt heads off. Once the flywheel is off, you can take the remaining bolt out with a set of lock pliers.

[Wazman999]

bolts off.......

just needed to be in 6th gear

thanks guys

[E92William]

That would have sucked with an automatic..