Timing Chain Tensioner: Service and Repair

Timing Chain Tensioner Replacement

Special Tools

* EN-45027-1 - Tensioner Tool

* EN-45027-2 - Tensioner Tool

For equivalent regional tools, refer to Special Tools (LDK, LHU) Tools and Equipment.

Removal Procedure

1. Remove the camshaft cover. Refer to Camshaft Cover Replacement Service and Repair.





2. Remove the timing chain tensioner (1) and the timing chain tensioner seal ring (2).

Installation Procedure

1. Inspect the timing chain tensioner. If the timing chain tensioner is damaged, replace the timing chain tensioner.





2. Measure the timing chain tensioner assembly from end to end. If the timing chain tensioner is to be replaced, a new tensioner should be supplied in the fully compressed non-active state. A tensioner in the compressed state will measure 72 mm (2.83 in) (a) from end to end. A tensioner in the active state will measure 85 mm (3.35 in) (a) from end to end.





3. If the timing chain tensioner is not in the compressed state, perform the following steps:

1. Remove the locking ring from the tensioner body.

2. Remove the piston assembly from the tensioner body of the timing chain tensioner by pulling it out.

3. Install the EN-45027-2 - tensioner tool (2) into a vise.

4. Install the notch end of the piston assembly into the EN-45027-2 - tensioner tool (2).

5. Using the EN-45027-1 - tensioner tool (1), turn the ratchet cylinder into the piston.

4. Inspect the bore of the tensioner body for dirt, debris, and damage. If any damage appears, replace the tensioner. Clean dirt or debris out with a lint-free cloth.

5. Inspect to ensure all dirt and debris is removed from the timing chain tensioner threaded hole in the cylinder head.





Caution:
Refer to Fastener Caution Fastener Caution.

6. Install the timing chain tensioner (1) with a NEW seal ring (2) and tighten to 75 Nm (55 lb ft).





7. The timing chain tensioner is released by compressing the tensioner 2 mm (0.079 in) which will release the locking mechanism in the ratchet. To release the timing chain tensioner, use a suitable tool with a rubber tip on the end. Feed the tool down through the cam drive chest to rest on the cam chain. Then give a sharp jolt diagonally downwards to release the tensioner.

8. Install the camshaft cover. Refer to Camshaft Cover Replacement Service and Repair.