Hi my name is mike and I'm new to this site so forgive me for asking dumb questions lol. I have a 2001 s40 and i took the cam sprockets off without marking them and don't know what to do about getting it back together right. I'm sure someone on here has done this before. Please let me know if someone can help me.

 

Welcome to the Forum!

Having made this mistake I can tell you it's a royal PITA to fix it. The intake cam gear is easy enough, it only mounts one way.

The exhaust CVVT gear is the problem child though because the gear can be mounted in any position. The easiest method is buying the Volvo cam holder tool. It's not the cheapest though; VOLVO CAMSHAFT ALIGNMENT GAUGE

What I did was make my own tool out of scrap steel. Then it took 4 tries before I got it close enough so the check engine light did not come on for the cam advance being out of tolerance. 10* of physical cam movement is a tiny mistake to make but it's huge for the ECM and will set the check engine light.

You basically set the horizontal cut on the drivers side of the cam to exact level with the parting line where the cam holder meets the head. Notice the cut is not exactly in the middle, it's below the horizontal plane such that one edge is even with the parting line and the other falls below it. After several "eyeball it" errors I cut down a wooden paint stick to align the cut with the parting line exactly. Then I made the metal cam holder to secure the cam and then bolted on the CVVT gear. The 80lbs torque on the CVVT bolt means the cam will try to move.

Once back together always turn the engine slowly by hand to see if the engine rotates freely. This is an interference engine and you could bend valves if the cam is 180* out. I bent 8 exhaust valves with a slipped timing belt. That's what got me into the CVVT mess to begin with.

 

Thanks for your help. I have to master volvo timing set. So all i have to do is use the drivers side cam tool? This car is more difficult than working on my ls1 camaro. Thanks

 

I know the feeling. I have a 3.4L V6 out of a 1995 Camaro that I put in my 1986 Fiero. The good old Chevy pushrod engine is reliable and easy to find replacement parts.

Yes, if you use the cam tool to line up the cam then bolt on the CVVT gear with the timing mark lined up with the plastic cam gear cover, then all should be well.

Here is a link with good pictures and explanations on a 850 engine. It's similar to what you are looking at:
Replacing The Head Gasket On A Volvo 850

 

Thanks buddy you have been a great help