2005 v70 camshaft alignment

raubol · Post by **raubol** » 12 Aug 2015, 15:07

I removed the head for inspection and cant get the camshafts aligned upon reassembly.I removed the pulleys without marking the intake position prior to removal, I could see the marks on the exhaust cam and the intake is the cvvt I purchased the camshaft locking tool after the fact installed the camshafts so that both the intake and the exhaust valves were closed with the #1 cylinder tdc. I then started to rotate the engine to check the proper alignment of the marks and somethin stopped the rotation. Immediately I removed the cam cover for inspection. Can someone tell me the sequence the valves open and close or what valves are open and closed at tdc. I think my intake camshaft may have been in the wrong position even though I used the cam loc tool for installation Thanks,

Post by **chrism** » 12 Aug 2015, 21:18

Did you purchase the alignment tool that aligns the slots on the back ends of the camshafts?

raubol · Post by **raubol** » 12 Aug 2015, 23:17

yes I did . The tool seemed to fit only one way on the camshafts which put both the intake and exhaust valves in the closed position.

Post by **chrism** » 13 Aug 2015, 07:22

OK. Did you make note that the slots in the ends of the camshafts are slightly off-center? So to add to the wierdness of this whole procedure, when you install the tool, the slot on the intake cam should be ABOVE center and the slot on the exhaust cam should be BELOW center. So the slots should be parallel to each other (and also parallel to the deck surface), but not on the same plane to each other. I have no earthly idea why Volvo did it that way. Anyway, I'm thinking you may have one of the cams 180 deg out of position.

Another interesting note is that when the crank sprocket is on its indexing mark, the #1 piston is NOT exactly at TDC, but rather slightly off by several degrees. This assures that NONE of the five pistons are at the top of their stroke which, in turn, allows you to rotate the cams however you need to for proper alignment without running up against any piston/valve interference.

Post by **cuhfs** » 13 Aug 2015, 08:55

So it stops clockwise, Does it move freely in the counter clockwise direction? or it stops too? just wondering.

Post by **rspi** » 13 Aug 2015, 22:10

Please do not try to time these and other newer vehicles with reference to TDC. That is NOT how it works.

If the head is INSTALLED, how do you know if a valve is open or closed? Really, that doesn't matter.

As explained ^^^, the crank sprocket must be aligned on it's MARK before you do anything else. This gets the pistons out of the way of the cams. Then align the cams on the back side of the head and install the locking tool. After that, install the cam sprockets/hubs to align with the MARKS on the cover. As for the (C)VVT hubs, they must be installed properly. There are a few videos on YouTube as to how to properly set those. (Not sure why anyone removes those when pulling a head).

After the cams (and crank) are aligned, with the marks, install the belt, set the tensioner, remove the locking tool and roll the engine around a few times (2 crank revolutions = 1 full revolution of the cams). Then what "I" do is reset the tension on the mechanical tensioner, and roll the engine around a couple more times. Then "I" check the tensioner to make sure it still looks proper. If all marks are still aligned, I install the plugs and start the car.

Hope that helps, that's all I have.

3carmark · Post by **3carmark** » 22 Aug 2015, 13:34

my kit came with a crank locking tool also which requires removal of the starter (on my s80) then i tighten the vvt gear bolts slightly and turn the gear clockwise until the mark lines up the reason for this is there is nothing to hold the inner workings in place except the friction of the bolt DO NOT turn the gear counter clockwise while doing this also when i had the crank against the tool the crank did NOT line up exactly with the marks on the gear and oil pump