Mazda B-Series 1998-06

Valve Lifters/Hydraulic Lifters/Tappets



The manufacturer does not recommend that the Hydraulic Lash Adjusters (HLA) be bled. Removing an HLA from its rocker arm will release its oil. If the HLAs are removed from the rocker arms, new ones should be installed using new O-rings.

  1. Before installing new HLAs, fill the rocker arm oil reservoir with fresh engine oil.
  3. Apply fresh engine oil to the new HLA and its O-ring.
  5. Install the new HLA into the rocker arm, taking care not to damage or distort its O-ring.

Removal & Installation

2.3L & 2.5L Engines

A special tool is required to compress the valve spring.

  1. Remove the valve cover and associated parts as required.
  3. Rotate the camshaft so that the base circle of the cam is against the cam follower you intend to remove.

If removing more than one cam follower, label them so they can be returned to their original position.

  1. Using special tool 49-UN01-135 or equivalent, depress the valve spring, as necessary, and slide the cam follower over the Hydraulic Lash Adjuster (HLA) and out from under the camshaft.
  3. Remove each HLA.
  5. Install the HLA and cam follower in the reverse or