What order do you use when installing a timing elt?

[hans747]

I'm ready to throw some dang tools over here. Please help...

Working on a 2004 XC70 with dual VVT cams.

I have the cam locking tool in place. I set up the cam hubs so their forward-most (clockwise) play aligns all the timing marks on the sprockets and the timing cover. I align the timing marks on the crankshaft.

I set the belt on the crankshaft, then tension, then water pump, then exhaust cam, then intake cam, then idler pulley.

By the time I go to tighten the tensioner, either the cams or to the crank has moved.

Questions:
Is there any trick to lock the three main pulleys in place while I'm setting up the belt?

What is the best sequence of pulleys to install the timing belt?

[hans747]

Nevermind! I found the answer myself.

1. Install the belt ont he crank pulley
2. Stuff a bundled up rag under the crank pulley to prevent the belt from falling off.
3. pass the belt up the right side, past the idler pulley
4. keep the belt tight as you wrap it over the intake cam
5. send it over the exhaust cam (making sure there is no slack in the belt between the cams)
6. go dowan around the water and then slip it over the tensioner pulley

The trick is to have an assistant whose entire job is holding the VVT cam sprockets in place as you route the belt. Those sprockets like to fall out of position.

[RickHaleParker]

The trick is to have an assistant whose entire job is holding the VVT cam sprockets in place as you route the belt. Those sprockets like to fall out of position.

You can lock the VVT sprockets in place with a Universal cam lock. The type that wedges between the two sprockets.
One MVS member solved the movement problem by using a Zip Tie to bind the two sprockets together.

Be sure to also install the Volvo camshaft lock on the backside so the camshafts will be aligned correctly.