Intake Manifold Vacuum Port Repair

STANDARD PROCEDURE - INTAKE MANIFOLD VACUUM PORT REPAIR





The composite intake manifold vacuum ports can be repaired. Although, if the manifold plenum chamber is damaged or cracked, the manifold must be replaced.
To repair a broken or damaged vacuum port on the composite intake manifold, perform the following procedure:

NOTE: While performing this procedure, avoid getting 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 port axis).





2) Drill out the port base using a 7/16" (brake booster port) or 11/32" (LDP/speed control port ) drill bit (Fig. 151).
3) Using a 1/4"-18 NPT (brake booster port) or 1/8"-18 NPT (LDP/speed control port ) pipe tap, cut internal threads (Fig. 151). Use caution to start tap in a axis same as original port.
4) Apply Mopar(R) Thread Sealant to threads of repair port (s).
5) Install repair port (s). Do not over torque repair port (s).