Cam Timing Issue

Robert Johnson · Post by **Robert Johnson** » 09 Jan 2012, 21:49

I have a 2003 S60 with the 2.4T engine. It has 104,000 MI and runs fins. I changed the water pump and timing belt as PM. The crank had no timing mark that I could find. So I lined up the marks on the cams. Marked the crank referenced to the block with a tire crayon and removed the belt. I put a dial indicator in #1 spark plug hole and rotated the crank to exactly TDC. This was a little beyond the crayon mark. Put the belt on, checked the marks on the cams. Rotated the engine a few turns and rechecked the alignment at TDC. Everything was spot on. Road tested the car and it ran fine. Now I have the dreaded P0016 code. I reset the code but it came right back. I can reset the belt again to the origional crayon marks. But I have never seen an Engine where the crank is not set at TDC when the cam marks are lined up. Can this be right? Is there a crank mark I'm missing? Can the cam position sensor be reset? Did something go wrong with the VCCT set up on the exhaust cam? How do I check it? Where do I start. The car runs fine but the "Check Engine" light is on all the time because it is throwing the P0016 code.

Post by **erikv11** » 09 Jan 2012, 21:53

I usually post in the 92-00 forum, so I don't know your engine per se but over there, the white blocks are all the same: when the crank and the cam gears are on the mark, #1 is a couple cm shy of TDC. The other pistons are well off TDC, of course. Volvo did it this way so that you can put the crank on the mark, lock it there, and safely spin the cams if/as needed, without valve interference.

So likely your engine is the same but I dunno, somebody will chime in soon I am sure ...

Post by **jimmy57** » 09 Jan 2012, 22:15

Not timed at tdc.
The crank gear has two markings. If you look at the hub where the balancer/serp. belt pulley attach you will see a cast line sticking up. The other is a set of marks on each tooth at back of the teeth straddling the depression that is the aligned point.

You marked it right and it would have been spot on if you left the crank where it was.

Robert Johnson · Post by **Robert Johnson** » 10 Jan 2012, 20:29

Thanks for the reply. I will put it back at the mark.