While changing belt on volvo 960 1992 moved the camshafts how to sincronize agaein

Your pvc or so called oil trapp is plugged replace that and look at the engine where it goes in for blockage too that's the problem Regards Chris

Here's a link to your code.

Do not take it off before you are ready with the new one.
Turn the crankshaft until the engine is at tdc. The key on the pulley should be at the top.
Use a little paint brush and a little paint,and mark a couple of teeth on the camshaft pulley and the belt in between these teeth. if there are any other pulleys using the belt, do the same for them.
Do the same for the crank pulley. Take off the belt, try not to move anything. Count the belt teeth between these two marks and transfere them to the new belt. Now fit the belt in the exact places that the old one came off. Do this very carefully and you should have no problems.

If camshaft is not rotating then your belt or chain is either broken, or so loose with slack that it just slips

Volvo recommends for Volvo S80, changing the timing belt every 105,000 miles. Needless to say, they are pretty religious about this now.
The B20, B21, B23, and B230 engines are non-interference engines, meaning that the camshaft can be rotated independently of the crankshaft and no damage will result to the engine. That is, if the timing belt breaks, the valves will not hit the pistons; the engine will simply stop.
On the other hand, the B234 16-valve engines and any of the other Volvo multi valve engines are interference engines. Loss of the timing belt in these engines will result in severe or fatal engine damage.
Your car might be fitted with:
2.8L (VIN 90, 6th & 7th digit, B6284T eng, turbo)
2.9L (VIN 94, 6th & 7th digit, B6294S eng)
To get more information you can download the Owners manual at:
http://new.volvocars.com/ownersdocs/2001/2001_s80/01s80_08b.htm

Timing belt alignment markings




Here is all the tech info for removing and replacing....hope this helps you:

4-Cylinder Engine

1. Before servicing the vehicle, refer to the Precautions section.
2. Remove or disconnect the following:
   • Negative battery cable
   • Right hand engine cover
   • Cover over the right headlamp
   • Accessory drive belt
   • Front timing cover
   • Servo reservoir
3. Position Volvo lifting beam 999 5006 or equivalent slightly in front of the front lifting eyelet for the engine. Use Volvo lifting arm 999 5383 or equivalent and Volvo lifting hook 999 5460 or equivalent to raise the front of the engine a few millimeters.
4. Remove or disconnect the following:
   • Right-hand engine mount
   • Right front wheel
5. Turn the crankshaft until the markings on the crankshaft and camshaft pulley correspond. Turn the crankshaft a further 1/4 turn clockwise and then back again until the markings correspond. The markings are illustrated. Remove the upper timing cover.
6. Slacken off the center screw for the belt tensioner slightly.
7. Turn the tensioner clockwise to 10 o'clock.
8. Remove or disconnect the following:
   • Air baffles
   • Lower belt cover
   • Timing belt

To install:

1. Turn all the pulleys listening for bearing noise. Check to see that the contact surfaces are clean and smooth. If the tensioner pulley lever or idler is seized, replace it.
2. If replacing with a new idler pulley, tighten to 18 ft. lbs. (24 Nm).
3. If replacing tension pulley, screw into place using the center bolt by hand. Ensure that the tensioner fork is centered over the cylinder block rib. Ensure that the Allen hole on the eccentric is at "10 o'clock".
4. Install the timing belt in the following order:
   1. Around the crankshaft sprocket
   2. Around the idler pulley
   3. Around the camshaft sprockets
   4. Around the water pump
   5. Onto the belt tensioner
5. Carefully turn the crankshaft clockwise until the timing belt is tensioned. The belt must be tensioned between the intake camshaft pulley, the idler pulley and the crankshaft
6. Hold the belt tensioner center screw secure. Turn the belt tensioner eccentric counter-clockwise until the tensioner indicator passes the marked position.
7. Then turn the eccentric back so that the indicator reaches the marked position in the center of the window and tighten the center bolt to 15 ft. lbs. (20 Nm).
8. Press the belt to check that the indicator on the tensioner moves easily.
9. Install or connect the following:
   • Lower belt guard
   • Air baffles
   • Upper timing cover
10. Turn the crankshaft two turns. Check that the markings on the crankshaft and camshaft pulley correspond.

NOTE Check that the indicator on the belt tensioner is within the marked area.

1. Install or connect the following:
   • Lower timing cover
   • Front timing cover and tighten to 9 ft. lbs. (12 Nm)
   • Accessory drive belt
   • Engine mount and tighten to 49 ft. lbs. (67 Nm)
   • Servo reservoir. Tighten bolts to 37 ft. lbs. (50 Nm).
   • Front wheel
   • Right hand engine cover
   • Cover over the right headlamp
   • Negative battery cable

Click on the following free direct Link. It has the Timing: Belt and Mark Diagrams for your 1994 Volvo 960. Plus additional Instructional and Directional Diagrams.

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

http://www.2carpros.com/car_repair_information/year/1994/make/volvo/model/960/1994_volvo_960_timing_belt_diagram_marks.htm

if your only changing your belt you should be ok if you make your own. but if you already removed the belt and forgot to mark it you will need to use timing tools that go into the back of the camshaft behind two little rubber caps.

if this is 6VD1 engine it has single cam gear each head, but is still a 2 cams per head, engine
if belt has broke or you have turned any gear you must remove rocker covers to check positions of camshafts front lobes are in certain spot as well as timming mark on belt driven cam gear to cover
this cam gear is a 3:1 ratio (3 turns of cam gear = 1 turn of cams)

fFirst of all you must replace the timing belt with new. The second problem you have is it sounds as if you have not set the engine, to the correct position before you removed the belt, it is very difficult to set the marks without everything moving together. If you move one camshaft without the other one moving in unison you will bend valves. I also need an engine code for the correct timing marks. as there are 2 options for this vehicle. It may be cost effective at this stage to employ a good technician to finish the job for you. But if you can give me the engine code i will send the info.