Hydraulic Variable Valve Timing Actuator and Exhaust Camshaft Component Installation Note

Apply SAE 90 gear oil or equivalent, or engine oil to the positions shown in the figure.
CAUTION:
- Apply 0.05 ml {0.05 cc, 0.003 in 3} or less of oil to area A in the figure.
Fig 1: Applying Engine Oil To Area A
Courtesy of MAZDA MOTORS CORP.
Apply SAE 90 gear oil or equivalent, or engine oil to the following locations of the exhaust camshaft.
- Thrust surface of front journal (both surfaces front and back)
NOTE:
- If oil is applied to the front camshaft cap, oil should not be applied to the thrust surface of the front journal.
Remove the rope suspending the timing chain on the exhaust side.
While aligning the mark on the timing chain placed during removal with the one on the hydraulic variable valve timing actuator, place the exhaust camshaft component on the cylinder head.

Fig 2: Aligning Mark On Timing Chain
Courtesy of MAZDA MOTORS CORP.
Apply SAE 90 gear oil or equivalent, or engine oil to the central area of each journal on the exhaust camshaft.

Fig 3: Apply Engine Oil To Central Area Of Journal On Exhaust Camshaft
Courtesy of MAZDA MOTORS CORP.
Apply SAE 90 gear oil or equivalent, or engine oil to the thrust surface of the front camshaft cap.
NOTE:
- If oil is applied to the front journal thrust surface of the exhaust camshaft, oil should not be applied to the front camshaft cap.
Apply sealant (Loctite #962T or equivalent) to the rear camshaft cap installation area on the exhaust side or the rear camshaft caps on the exhaust side of the cylinder head.
NOTE:
- To prevent engine oil leakage, apply sealant to the rear camshaft cap installation area on the exhaust side or the rear camshaft caps on the exhaust side of the cylinder head, and seal the journal.
Fig 4: Applying Sealant To Rear Camshaft Cap Installation Area
Courtesy of MAZDA MOTORS CORP.
CAUTION:
- Do not spill sealant on the journal.
Sealant agent bead width

1-3 mm {0.04-0.11 in}
Install the camshaft caps in the marked number order, and temporarily tighten the camshaft cap installation bolts in two or three passes evenly.
Tighten the camshaft cap installation bolts in two steps in the order shown in the figure.

Fig 5: Camshaft Cap Installation Bolts Tightening Sequence
Courtesy of MAZDA MOTORS CORP.

Tightening torque

Step 1: 3.0-6.0 N.m {31-61 kgf.cm, 27-53 in.lbf}

Step 2: 8-11 N.m {82-112 kgf.cm, 71-97 in.lbf}