Engine Mounts - Vibration/Shake While Driving
Article No.96-4-15
02/12/96
^ VIBRATION - "AFTERSHAKE" - LESS THAN 72 KM/H (45 MPH) - WHEN DRIVING OVER A BUMP - 4-DOOR - WITHOUT ENGINE BLOCK HEATER
^ VIBRATION - SHAKE - ABOVE 80 KM/H (50 MPH) - ALL DRIVING MODES - SMOOTH ROAD OPERATION - 4-DOOR - WITHOUT ENGINE BLOCK HEATER
LIGHT TRUCK:
1993-94 EXPLORER
This TSB article is being republished in its entirety to delete a Policy Manual reference.
ISSUE:
A vibration/shake may be felt in the seat and/or floor at speeds above 80 km/h (50 mph) and peaking near 105 km/h (65 mph) on some vehicles. This condition is not rpm dependent and occurs at all driving modes, i.e., acceleration, cruise and deceleration. An "aftershake" condition may also exist when driving over a bump at speeds less than 72 km/h (45 mph). This condition may improve with tire balancing or tire exchange, but may not be completely eliminated. This may be caused by the movement frequency of the engine aligning with the tire rotation frequency causing the vibration/shake.
ACTION:
Confirm the vibration/shake condition occurs in all driving modes, including neutral coast. Install new design LH and RH engine mounts and rear axle-to-frame lateral shock absorber kit. Refer to the Service Procedure for details.
This procedure will NOT compensate for:
^ Out-of-round or out-of-balance tire/wheel assemblies
^ Vibration resulting from abnormal tire wear
^ Other tire/wheel quality or out-of-specification issues.
Wheel/tire assemblies may require service if the vehicle is not acceptable following the new engine mount and rear axle shock absorber installation. Refer to the Noise/Vibration/Harshness (NVH) Section of the appropriate year Explorer Service Manual for further details.
NOTE:
THIS TSB ARTICLE DOES NOT APPLY TO VEHICLES WITH ENGINE BLOCK HEATERS. INADEQUATE CLEARANCE EXISTS FOR THE NEW ENGINE MOUNT INSTALLATION WHEN THE VEHICLE IS EQUIPPED WITH AN ENGINE BLOCK HEATER.
SERVICE PROCEDURE
1. Visually inspect the tires for abnormal/irregular wear patterns. If necessary, replace the tire(s) with original equipment type and size. Set tire pressure as specified on the certification label located on the left front door pillar.
2. Check the tire/wheel assembly for correct balance and repair as necessary.
3. If the vibration/shake condition still exists, install the new Engine Mount and Rear Axle Shock Absorber kit (F67Z-6k007-AA) (Figures 1, 2, and 3). Refer to the Instruction Sheets included with the kit for service details.
4. Road test vehicle to verify the concern has been corrected.
The Engine Mount and Rear Axle Shock Absorber Kit (F67Z-6K007-AA) consists of the following:
LH Engine Mount
^ One (1) Insulator Assembly (LH)
^ One (1) Engine Mounting Bracket
^ Four (4) M10x25 Bolts
^ One (1) Nut/Washer Assembly
^ One (1) M12x1.75 Hex Flange Head Nut
RH Engine Mount
^ One (1) Insulator Assembly (RH)
^ One (1) Engine Mounting Bracket
^ Three (3) M10x25 Bolts
^ One (1) Nut/Washer Assembly
^ One (1) M12x1.75 Hex Flange Head Nut
Rear Axle-to-Frame Lateral Shock Absorber
^ One (1) Axle Pinion Damper
^ Three (3) M10 Bolts
^ One (1) Shock Absorber
^ Two (2) M12 Bolts
^ Two (2) M12 Flag Nuts
^ One (1) Frame Bracket
^ Three (3) M10 Bolts
^ Three (3) M10 Nuts
^ One (1) Instruction Sheet (I.S. # 6611C)
NOTE:
FOR 1991-92, 4-DOOR, REFER TO TSB ARTICLE 96-4-16. FOR 1991-94, 2-DOOR, REFER TO TSB ARTICLE 96-4-17.
PART NUMBER PART NAME
F67Z-6K007-AA Engine Mount And Rear Axle Shock
Absorber Kit
OTHER APPLICABLE ARTICLES: 96-4-17, 96-4-16
SUPERSEDES: 95-21-8
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION TIME
960415A Replace Engine Mount 2.9 Hrs.
Assemblies And Install
Rear Axle Lateral Shock
Absorber
DEALER CODING
CONDITION
BASIC PART NO. CODE
6K007 33
OASIS CODES: 703000, 703200, 703300, 703400