INTAKE MANIFOLD VACUUM PORT REPAIR—
2.7L
The composite intake manifold vacuum ports can
be repaired. Although, if the manifold plenum cham-
ber is damaged or cracked, the manifold must be
replaced.
To repair a broken or damaged vacuum nipple
(port) on the composite intake manifold, perform the
following procedure:
PARTS REQUIRED TOOLS REQUIRED
Brass Nipple – 3/8” O.D.
x 1/4” pipe thread (Speed
Control Port)
Pipe Tap – 1/4” - 18 NPT
Brass Nibble – 1/2” O.D.
x 1/4” pipe thread (Brake
Booster Port)
Drill Bit – 7/16”
File/Sand Paper
NOTE: While performing this procedure, avoid get-
ting the manifold material residue into the plenum
chamber.
(1) File or sand the remaining port back until a
flat surface is obtained (plane normal to nipple (port)
axis).
(2) Drill out the nipple (port) base using a 7/16”
drill bit (Fig. 38).
(3) Using a 1/4”–18 NPT pipe tap, cut internal
threads (Fig. 38). Use caution to start tap in a axis
same as original nipple.
(4) Apply Mopart Thread Sealant to threads of
repair nipple(s).
(5) Install repair nipple(s). Do not over torque
repair nipple(s).
Fig. 37 Engine Timing
1 – 12 PINS
2 – CAMSHAFT TIMING MARKS
3 – 12 PINS
Fig. 38 Manifold Port (Nipple) Repair
1 – 1/4” — 18NPT PIPE TAP
2 – NIPPLE (PORT)
9 - 30 2.7L ENGINE LH
SERVICE PROCEDURES (Continued)
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