It has a timing chain.
Align the timing marks on the camshaft gears to the notches on the camshaft cover, using the intake gear mark for the intake gear and the exhaust gear mark for the exhaust gear. 38. Align the mark on the crankshaft gear with the notch at the bottom of the rear timing belt cover.
no
the van either has a chain or a gear to gear timing system. GM did not us belts in that engine
Need to know where the timing chain gear marking are?
yes
It has a chain with a cam gear and crank gear.
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.
bellpey@yahoo.com
There is both a timing chain which connects to a timing gear (cam and crank shafts) Not as regularly scheduled maintenance item - replace only when needed
The timing chain is located on the front of the engine behind the water pump. The top gear is the camshaft and the bottom is the crankshaft.
no