pairtoe

iTrader: (4)

does any one have a hard vacuum line digram for a 2.8. or does any one know where i can get replacement hard vaccum lines, besides the junkyard.

Project: 85 2.8 bird

Karl (KED85) had posted pics of my 85 diagram, pretty sure your 87 IS different.

AZ/Advance Auto has the lines (skinny ones) in a semi-bulk pack, in the HELP section iirc.

2.8RS

iTrader: (5)

Go to a dealership. They will have a diagram and vaccum lines.

Shookum2004

So all the vacuum is one size fits all? i have the slightest clue how to replace these, and they seriously need replacing...

oldschool

The vacume signal harness for the 2.8 third gen F-car is no longer available from the GM dealer. Go to the HELP section at advance auto buy the bulk lines and fabricate your own.

2.8RS

iTrader: (5)

Any of the parts stores will have everything that you will need to make a new vaccum system.

micali

iTrader: (1)

here you go this is for 86-89


http://www.autozone.com/az/cds/en_us...rInfoPages.htm This is the page that has all the years. I hope this helps.
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I went to a salvage yard and found the lines off of a 3.1 and they worked. I had to make a few changes but over all they are fine. When I had to make a bend I used a lighter to heat the tube up and then cooled it off with cold water to harden it up fast. I even had to cut the hard lines and then I spliced them back with tubing and it works fine, no leaks.

karrfirebird87

iTrader: (1)

HI IVE GOT ALL COMPLETE ORIGINAL, 2.8 V6 HARD VACUME LINES IN EXCELLENT SHAPE FROM AN 87 FIREBIRD YOU CAN HAVE THEM FOR 35 BUCKS INCLUDES S&H
LET ME KNOW IF INTERESTED

forkvoid

iTrader: (1)

On the topic of hard vaccum lines: what's the point? Why not have all rubber and save yourself from the possibility of snapping them?

2.8RS

iTrader: (5)

I think that the hard lines are a larger inner diameter. For a flexable one to be that but of diameter the rubber would be thicker so it doesn't buckle. Thats what I would think.