Engine tappets
The timing belt is inside the timing cover.
It is located inside the timing cover housing , It is located inside the timing cover housing ,
timing chain is inside the timing chain cover which is located between block and water pump. the water pump mounts to the front of timing case There is a cover that is behind the water pump... The timing chain is under that cover.
This engine does not use a timing belt, it does use a timing chain instead which is inside of the engine behind the front cover
The timing belt is located inside the timing belt cover at the fron of the engine.
There is no timing belt on a 3.0 DOHC. There are two timing chains which are inside the engine under the timing cover.
Depending on what is driven by the timing belt, it may be a few things. Usually the tensioner or water pump, but it could also be a glazed belt or even the cover rubbing on the belt
It is on the inside of the timing chain cover.
It is on the inside of the timing chain cover.
Behind the timing cover inside the alloy lookin housing
There are two parts to the speed sensor, one is located at the bottom of the timing chain cover, this is the sensor that has the electrical harness plug into it and is on the outside of the timing chain cover. The other part is more complicated and this is the sensor located inside the timing chain cover and is like a magnet and its plugged in a hole on the lower timing chain gear. I replaced the magnet sensor on a 1988 buick riviera, the one that is located inside the timing belt cover, it is a pain to get to it, once you remove the timing belt cover you have to remove the timing chain and the timing chain sprockets,, the sensor is located behing the timing chain lower gear so you have to remove the gear and the sensor plugs into a hole on the gear itself. The way it works is like this,,,the magnet that is located on the lower gear inside the timing chain cover turns and when it turns it passes trough the sensor located on the outside of the timing gear when they meet it creates a electrical pulse read by the computer and it tells it the speed of the engine.
It is inside the timing belt cover, on the front of the engine.