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Discussion Starter #1
Hello all
Before I changed the cambelt - was waiting for the parts to arrive - it let go one me while I was taking a few days off at the coast:(
the car is at and engineering works to pull the head, replace the valves, etc. The tech called me this morning to say that the two VVT pulleys can rotate backward and forward with no resistance so he thinks that they need replacing. They aren't Volvo specialists so I wanted to check whether this is normal or not before I shell out another heap of cash.
Please help, this holiday is already costing me ten times my budget
David
 

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2007 S40 2.4i AW55-50 / 2007 C70 T5 AW55-50
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What year is your car?

I know that in other Volvo models the VVT pulleys can do that and that is normal.

But on the 2006-2013 C70, the VVT pulleys have a self locking mechanism and they are not supposed to rotate back and forth freely. And the only way to make them rotate that way is with oil pressure, that releases the internal lock

Here is a picture of the internals of the VVT. If you look the body on the right it has like a small “button”, that is the lock and its spring loaded. And it locks on groove of the cover that is on the center of the picture.



And if by chance your VVT pulleys happen to be on the “unlocked” position, which is something really rare, I must say.

The quick way to lock them back to where they are supposed to be, is by bolting them to a camshaft, and rotate the pulley or the cam until the VVT lock clicks once it got in its place.

Do not let your mechanic dissasemble the pulleys before doing that. Once the pulley is dissasembled is ruined. Because the part that bolts to the cam needs to be perfectly centered in the sprocket and that is not achievable by hand. Otherwise your pulley will be unbalanced and can make the belt go out and put you back where you are now.


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Discussion Starter #3
VVT pulleys thanks

Thanks a lot Facusan, that is REALLY helpful, we will give that a try and get back to you. My car is a 2012 model so it fits into the range you mentioned
Much appreciated
David
 
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