My 1992 Olds Delta 88 has the serpentine belt diagram on the top of the radiator
I could send a photo - email me at ken.elder@shaw.ca
I found this information with a diagram of the serpentine belt. Hope it helps.
If you go towww.autovalue.com and look up the belt for your car, you can click on the first line in the parts list and get a routing illustration to print off.
loosen the motor mount on the right side lift the motor a little to get the belt thru drop it back down tighten it up and thread the belt on the pulleys via diagram
I went to a Chevy dealer and they printed me a copy for my 97' delta 88. I'm sure they could do it for you.
I have seen on an Olds forum that the belt for the 86 olds 88 w/o a/c will work. It should be 75.5 in instead of 103 (the 1986 88 belt is 76.1 in)
you havee to remove the lower bolt on the motor mount to get enough clearance to slide it through take it to someone its faster and easier that way
I've done this before, and it is difficult. You have to remove 1 of the bottom motor mount bolts and remove the bolt and spacer. The belt actually goes through the mount. How Dumb is that. Good luck.
push back on tensioner, then re move belt.
You need to locate the tensioner pulley which keeps pressure on the belt. Use a wrench (of correct size) and pull on the nut on the pulley to relieve tension on the belt. You should them be able to slide the belt off. You do the same thing to put the new belt back on. Make sure it is routed correctly. There will be a routing diagram for the belt on top of the radiator support. The nut for the pulley threads on in reverse so you won't loosen it when pulling on it.
remove the coolent tank and then use the pully to remove the serpentine belt. then you'll be able to see the water pump takes about half an hour tops.
http://autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/0b/a2/88/0900823d800ba288.jsp