How to turn over 4.0L V6 D3 engine without starting engine?

[nivekau]

I've just changed one of the timing chain tensioners on my 4.0L V6 D3 and want to turn the engine over without starting it to prime the new tensioner with oil. Would it be okay to disable the ignition by removing a fuse such as the one for the ignition coils?

[PerthDisco]

Disconnect battery and put a socket on crankshaft bolt after removing cooling fan and radiator shroud

[DiscoJeffster]

Just put a socket on the crank bolt and turn it clockwise, with the ignition off, nothing will happen. Even if the ignition was on, you’ll never wind it fast enough for it to do anything.

[josh.huber]

He'll be turning for a while.. Oil pump won't do good at 2rpm. Turn over once to make sure it clears, best method is to pull the spark plugs out so the engine has no load when priming

[DiscoJeffster]

He'll be turning for a while.. Oil pump won't do good at 2rpm. Turn over once to make sure it clears, best method is to pull the spark plugs out so the engine has no load when priming

I just re-read why we’re discussing this. In all honesty there’s no need to bother. Just put it together and start it. It’ll be fine. What difference is turning it over without starting versus with starting (at similar RPM)?
If the tensioner isn’t happy it’ll skip a tooth either way whether it starts or not.
I’ve never done this and have replaced numerous tensioners in other cars, but hey, OP, you do you.

[nivekau]

I just re-read why we’re discussing this. In all honesty there’s no need to bother. Just put it together and start it. It’ll be fine. What difference is turning it over without starting versus with starting (at similar RPM)?
If the tensioner isn’t happy it’ll skip a tooth either way whether it starts or not.
I’ve never done this and have replaced numerous tensioners in other cars, but hey, OP, you do you.

Yeah well it's been running just fine with a failed tensioner so I guess running it again while the new one primes isn't going to make a whole lot of difference.

Just to be clear on what has been replaced I have attached a photo - not sure if this part exists on any engine other than the 4.0L V6

181029

[nivekau]

I started it and there was no more than a second of clatter from the timing chain and then it came good. The tensioner obviously primed immediately. I'm relieved that's all that was required, just wish I had known that tensioner existed when I first heard the rattle from the timing chain!