How to install harmonic balancer/crank pulley?

[beewstew]

What's the preferred method for installing the Harmonic Balancer aka Crankshaft pulley on a 2003 Volvo xc70 w/ 2.5T?

There are 4x 10mm bolts on the face of the pulley, tightened to 25Nm then 60 degrees
There's also a ~ 30mm center nut that's supposed to be tightened to 180Nm

1. How do you hold the engine still to apply that much torque to the center nut (with a torque wrench of course)?

2. Is it better to torque the center nut or the 4x face bolts first?

[jonesg]

theres a lock tool for pulley removal, totally over priced.
the removal tool bolts up to the pulley face.

and a different lock tool for install.
the install tool requires removing the starter.

I have neither locking tools, opted to use impact wrench instead.
with blue loctite on the 32mm crank nut.
its been 2 or 3 yrs no problem.

[dikidera]

I use an impact wrench for install and removal.

[abscate]

I use a 18 inch breaker with a good strong shoulder pull once the timing belt is back on, car in gear. It’s a non critical torque.

[vtl]

Impact wrench here as well.

[leapdragon]

Hi guys, I am about to tackle this as one of my wagons has clear runout on the pulley (just spotted yesterday doing an oil change).

I presume that the pulley can be removed without removing the timing belt, just by removing the four bolts that hold it to the timing gear? Hoping my midrange impact can handle the job.

However, I'm a little more worried about reinstall. So based on the above it sounds like it's not super critical to torque to spec but what I'm really worried about is damaging the timing belt. If I apply a lot of torque, is there not a risk of damaging the belt or the teeth?

On the other hand, if I just use an impact to tighten, what is the risk of undertorque?

[vtl]

You need a bigger impact to deal with the 32 mm bolt. 11 Amps was always sufficient for me, I did it many times on many P2s.

[leapdragon]

Okay, have ordered the 1/2 700 ft lbs guy.

Still same concern... If I use the ugga dugga tool to get it off...and then back on... Will I kill the timing belt? Do you usually replace that as a matter of course when replacing the crank pulley for that reason?

[volvolugnut]

The mass of the crank and pistons resist the motion of the impact wrench. The timing belt does not stop the crank from rotation. I would have more concern about over tightening the crank nut. Be careful not to keep hammering away after the nut is tight.
There is a tool you can make to resist crank turning, but I cannot transfer my phone photos at this time.
volvolugnut

[volvolugnut]

These photos show how I made a tool to hold the crank hub to torque with a manual torque wrench.
volvolugnut