Mazda Engine >> REVISED ROCKER ARM FOR 3.0L SOHC MAZDA

Mazda Engine >> REVISED ROCKER ARM FOR 3.0L SOHC MAZDA

Revised Rocker Arm For
1989-96 Mazda 3.0L SOHC Engines

The AERA Technical Committee offers the following information regarding a revised rocker arm for 1989-96 Mazda 3.0L SOHC engines. This revision came as the result of customer complaints of upper engine noises. This information should be considered anytime rocker arm service is performed.

To reduce the likelihood of hydraulic lash adjustor (HLA) noise and provide a more durable lifter the depth of the HLA locating hole has been reduced as shown in Figure 1.

To help distinguish this revised rocker arm it is identified by a projection on the camshaft end of the rocker as shown in Figure 2. The original rockers shown in Figure 3 do not have a projection in that location.

To allow salvage operation of original style rockers for those engines that have exhibited noise complaints a ?washer" is available to insert under the HLA as shown in Figure 3. The ?washers" are available with Part #JEY1-12-SHO and are packaged 18 per part number. Rocker arm shafts and rockers for intake and exhaust sides are unique to their location. The revised style rockers and shaft can be used in place of the original style components, but not the other way around.

Revised Part # Old Part # Description Quantity

JFO1-12-160D JFO1-12-160C Intake Rocker Arm Shaft 2
JFO1-12-170E JFO1-12-170D Exhaust Rocker Arm Shaft 2
JFO1-12-130E JFO1-12-130D Intake Rocker Arm 12
JFO1-12-150D JFO1-12-150C Exhaust Rocker Arm 6
JEY1-12-SHO NONE Adjustment Washer 18

The AERA Technical Committee

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