smyth1

checking my timing marks before I take off the belt.belt was done before as there are white paint dots on cam gear.the timing notches look to be off a little bit at the 0 position.are they supposed to be dead on lined up?passanger side looks like it may be off a tooth.driver side looks close but not dead on.thanks

SteveG

It may have been adjusted by the PO for advance or retarding? Pic would help; what year is your car? There are step-by-step guides on belt change here or at the Pirtle site. Porken sells a tool for fine adjustment of the cams. If you get one of those, the instructions will explain it all to you, adjusting that is.

For belt change, usu people set crank at 45° and mark the cams, but that is not what you are describing.

Avar928

Get the 32VR Timing tool.

Check timing at TDC before you take the belt off so you know where it's at. You can even check and even set it at 45 with the tool. Passenger side should be -2 and driver side drop dead 0.

smyth1

not trusting anything the po did .0 should be tdc so that is where i'm checking it.

Dutch 928 fan

What car do you have? Mine had white dot as well, but on my type you really have to look at the indentations at the back of the cam gear. They have to line up with the pointer. The white dots are not the real timing points.

There are some really good photo tutorials.
Here's some:
http://static.ibsrv.net/autocomm/Con...ber%202012.pdf

http://dwaynesgarage.norcal928.org/1...0Procedure.htm


Once you align them, it will run smoothly.

Dutch 928 fan

Here is the other side. Indentation on the back. Right opposite of the marker.

Avar928

The belt on the first picture of the gear is awfully far on that edge.

Bill Ball

The position of the gear is determined solely by the timing belt and the geometry of the heads (i.e., shaved heads or a stretched belt might shift the position a little). So, it's nice if the rear notch and timing mark on the backing plate line up perfectly, but if you are less than 1/2 tooth off, that is as good as you can do. If you are more than 1/2 tooth off, move the belt over a tooth until it is less than 1/2 tooth between the notch and the mark.

The Porken tool adjusts the camshaft position relative to the gear, but not the gear relative to the timing mark.

Dutch 928 fan

Good eye! It was just after I timed the gears and put the belt on. Before I turned the crank to let the belt settle in the middle and before I set the tension. It is fine now.
Thanks though.