Delta 88 V6-231 3.8L (1983)
a.
Inspect AIR injector pipe for color. If pipe is black, new pipe has been installed, proceed to Step 3.
b.
If pipe is corroded or silver color, replace AIR injector pipe and check valve. Use a back up wrench to loosen pipe fitting from intake
manifold fitting. Remove clamp from hose end at check valve. Remove AIR injector pipe and AIR check valve.
c.
Install new AIR injector pipe, AIR check valve, and clamp.
FIGURE 2 - FRONT VACUUM BREAK ADJUSTMENT
3.
Inspect and replace, if necessary, primary (front) vacuum break:
a.
Check primary (front) vacuum break for leakage by applying vacuum with hand vacuum device (J 23738) or equivalent. The unit should hold
the vacuum level. If vacuum level is held, proceed to step 4.
b.
If vacuum level is not held, replace primary (front) vacuum break unit.
c.
Check vacuum break for proper setting (28 degrees). If adjustment is required, reset using primary break adjusting procedure shown in Figure
2.
4.
Reinstall air cleaner assembly and check engine operation. Check AIR injector pipe and check valve fittings for leakage.
5.
Remove fender covers.
6.
Install a Campaign Identification Label.
7.
Close hood.
CAMPAIGN IDENTIFICATION LABEL
Each label provides space to print the number, and the five (5) digit dealer code of the dealer performing the campaign. Insert this information with a
typewriter or ballpoint pen. When installing label, clean and dry the surface of the radiator support tie bar and apply the campaign label where it is
readily visible.
PARTS INFORMATION
To ensure parts are obtained as soon as possible, order them from GM Service Parts Operations (GMSPO) on a C.I.O. order, with NO special instruction
code, but on an advise code (2). Use the following part numbers:
Description
Part Number
Quantity Per Vehicle
AIR Pipe Assembly
25518946
1, as required
AIR Check Valve
22048579
1, as required
