The 850 has proven to be one of Volvo's most safest and reliable cars. There are many 850's still on the road today that have well over 200 thousand miles on the odometer. Of course maintenance is the key to a car's long life and changing the timing belt is one task that you eventually will have to perform. This guide will go through the timing belt removal and installation procedure. Because of the high mileage on this car, I will also replace the idler roller, tensioner pulley roller, and the water pump. If, during an inspection, the water pump does not make any unusual noises when rotated and does not have any coolant seeping out of the weep hole then a replacement is not necessary.
- 1994 Volvo 850
- 2.4L N/A Inline 5
- ~238,000 miles
Removing Accessories And Setting Correct Timing
1. Start off by setting the car on jack stands and removing the passenger side wheel.
2. Lift up the coolant reservoir by depressing the center clip, remove the sensor connector, and with the hose still attached, move the reservoir to the side.
3. Next step is to remove the serpentine belt. If you have something that can release the tension on the belt then go ahead and use that. I find it easier to just unbolt the tensioner and remove it all together. It is held on by two bolts.
4. Once you have the belt off, put the tensioner back in and slightly screw in the top bolt. This will allow you to swing the tensioner out and insert a 1" inch drive ratchet. Use the ratchet to rotate the tensioner so that you can lock it by placing something through the lock hole. Once you have it locked, remove the tensioner.
5. Remove the front timing cover that is held in with one 12mm bolt.
6. Next step is to line up all of the timing marks. There is an access cover in the wheel well. Use that to gain access to the crank bolt. Use a ratchet to rotate the crank clockwise until all of the marks align.
Rotate the engine until you line up the the groove in the crank sprocket with the mark in the block. This groove is very hard to see so you will more than likely have to do several rotations until you can line it up.
Here is a close up of the groove.
When you line up the crankshaft, the camshaft marks will line up with the cut outs in the timing cover. However, this 850 did not have any marks on the camshafts from the factory. If you run into this, double check that you have lined up the crankshaft correctly and mark the camshafts as I have done here.