The distributor is called an optispark. It is located behind the water pump. It you are going to change the cap and rotor then you may as well replace the water pump and optispark since they are known to get water in them and go bad.The water pump must be removed along with pully and balancer Expect to devote three to four hours and two hundred to three hundred dollars,change spark plug wires and plugs while your into it which means the power steering pump and reservoir and air pump must be also removed .Its a lot of work, use a book from parts store.
Change spark plugs and wires, change all fluids, check o2 sensors, distributor and rotor cap possibly, change all filters...and a fat wallet...
(This is from the 91 Caprice service manual for the HEI ignition system) Looking at the distributor cap from the front of the engine bay, and running clockwise around the cap from about the 1 o'clock position, the wire numbering is: 3,6,5,7,2,1,8,4
you dont
1,8,4,3,6,5,7,2
(This is from the 91 Caprice service manual for the HEI ignition system) Looking at the distributor cap from the front of the engine bay, and running clockwise around the cap from about the 1 o'clock position, the wire numbering is: 3,6,5,7,2,1,8,4
Not very for a mechanic. If you want to do it yourself get a shop manual. Make sure the negative battery terminal is completely disconnected. It just involves removing the air cleaner, distributor cap, and distributor hold down bolt (pretty sure is a 9/16. Also, are you sure you want to change the distributor? Did it fail, my 89 Caprice Brougham's distributor is fine. If you are getting bad ignition it is probably not the distributor. Check for cracks.
4 degrees BTDC. Fireing order is 1-8-4-3-6-5-7-2 clockwise on distributor cap.
There is no "chip" that can be replaced in the distributor, it is serviced as a unit. There is no chip in the distributor cap.
The cap and rotor are considered wear items and should be replaced. No repair options are practical.
The usual spot for #1 cyl on the cap is pointed directly at the #1 cyl on the car itself, anyway it's to the right of the center plug wire connector on the cap, looking directly at it from the front of the car. firing order is 18436572.
you got water under the distributor cap
Remove crankshaft pulley& ballance