Timing Chain Tensioner: Service and Repair

TENSIONER-TIMING CHAIN

REMOVAL





1. Disconnect negative battery (1) cable.





2. Remove timing chain cover.
3. Align timing marks (1,3,8).





4. Remove timing chain tensioner cover (2).
5. Remove timing chain tensioner (1).

INSTALLATION
RESETTING TENSIONER





The timing chain tensioner is a spring loaded hydraulic tensioner. To reset the timing chain tensioner, the following procedure must be followed.

1. Purge oil from timing chain tensioner using the following procedure:
a. Place the check ball end of tensioner (1) into the shallow end of Special Tool 8186 (3).





b. Using hand pressure, slowly depress tensioner (1) until all of the oil is purged out.

NOTE: To reset the primary timing chain tensioner, engine oil will first need to be purged from the tensioner.

2. Reset timing chain tensioner (4) using the following procedure:
a. Position cylinder plunger into the deeper end of Special Tool 8186 (3).
b. Apply a downward force until tensioner (4) is reset.

NOTE: If oil was not first purged from the tensioner, use slight finger pressure to assist the center arm pin of Special Tool 8186 (3) to unseat the tensioner's check ball.

NOTE: Inspect the tensioner O-ring (2) for nicks or cuts and make sure the snap ring (1) is correctly installed, replace as necessary.

TENSIONER-TIMING CHAIN





NOTE: Verify proper timing alignment prior to tensioner installation.

1. Reset tensioner.

NOTE: Inspect tensioner O-ring and snap ring, replace as necessary.

2. Install tensioner (1) in cylinder head.





NOTE: Tensioner retaining plate dowel pin (3) must be aligned with hole in cylinder head for proper installation.

3. Inspect tensioner retaining plate O-ring (2) and replace as necessary





4. Install tensioner retaining plate (2) and attaching bolts (3). Tighten bolts to 12 Nm (105 inch lbs.).