INSTALLATION PROCEDURES:
The saddle mount kit is designed to be used with 1987-95 YJ Wranglers. This mount is designed around a stock oil pan. If you are using an aftermarket oil pan, the maximum depth in the front is 4-1/2″. GM part number 12557558 (1986 and newer) has a front depth of only 3-1/2″ and provides the most mount to pan clearance We have designed this mount to position your new engine in the best location possible. Driveshaft modifications may be necessary depending on your application. We have had requests to allow some lateral adjustment with this mount. To supply this adjustment we have provided two 5/8″ spacers. Using these spacers, you can space the stock rubber mount 5/8″ to the front or rear of the saddlemount location.
This will allow 1-1/4″ of overall adjustment from front to rear. The 7/16″ flat washers must be used on both sides of the bolts that couple the GM rubber mount to our saddle mount. We have also provided a longer set of 7/16″ bolts for use when the 5/8″ spacers are being used. The stock motor mounts need to be completely removed from the frame before installing the new saddle mount. It is also recommended to remove the front shocks for ease of installation. Modifications to the skid plate (re-drilling) are required for ALL applications. An electric fuel pump is required for ALL applications. When installing the engine to the saddle mount, one rubber mount should be loosely fastened to the GM block and the second rubber mount should be installed to the saddle mount. As the engine is lowered into place, line up the rubber mount boltedto the block and fasten to the saddle; and then on the other side line up the three bolts of the rubber mount to the block. Once all the bolts are started, tighten all fasteners to secure the engine mounting.
The LT1 engine can be used with the bolt in YJ mount as long as you replace the A/C pump with the Chevy P/N 10115875. This is a replacement pulley for the LT1 that removes the A/C pump. The replacement pulley is slightly smaller in diameter and will require a new belt. The P/N 713087 mount is designed around a stock Jeep front axle. The photo above shows the mount with a Jeep that has a custom axle installed. The interference is due to the size of the axle housing and the lift that is installed. The axle is installed under the springs, a spring over on this axle would provide ample clearance for the mount. This is just an example of a potential interference problem.
Download Chevy V8 1987-95 Saddle Mount YJ Wranglers PDF Installation Instructions
The saddle mount kit is designed to be used with 1987-95 YJ Wranglers. This mount is designed around a stock oil pan. If you are using an aftermarket oil pan, the maximum depth in the front is 4-1/2″. GM part number 12557558 (1986 and newer) has a front depth of only 3-1/2″ and provides the most mount to pan clearance We have designed this mount to position your new engine in the best location possible. Driveshaft modifications may be necessary depending on your application. We have had requests to allow some lateral adjustment with this mount. To supply this adjustment we have provided two 5/8″ spacers. Using these spacers, you can space the stock rubber mount 5/8″ to the front or rear of the saddlemount location.
This will allow 1-1/4″ of overall adjustment from front to rear. The 7/16″ flat washers must be used on both sides of the bolts that couple the GM rubber mount to our saddle mount. We have also provided a longer set of 7/16″ bolts for use when the 5/8″ spacers are being used. The stock motor mounts need to be completely removed from the frame before installing the new saddle mount. It is also recommended to remove the front shocks for ease of installation. Modifications to the skid plate (re-drilling) are required for ALL applications. An electric fuel pump is required for ALL applications. When installing the engine to the saddle mount, one rubber mount should be loosely fastened to the GM block and the second rubber mount should be installed to the saddle mount. As the engine is lowered into place, line up the rubber mount boltedto the block and fasten to the saddle; and then on the other side line up the three bolts of the rubber mount to the block. Once all the bolts are started, tighten all fasteners to secure the engine mounting.
The LT1 engine can be used with the bolt in YJ mount as long as you replace the A/C pump with the Chevy P/N 10115875. This is a replacement pulley for the LT1 that removes the A/C pump. The replacement pulley is slightly smaller in diameter and will require a new belt. The P/N 713087 mount is designed around a stock Jeep front axle. The photo above shows the mount with a Jeep that has a custom axle installed. The interference is due to the size of the axle housing and the lift that is installed. The axle is installed under the springs, a spring over on this axle would provide ample clearance for the mount. This is just an example of a potential interference problem.
Download Chevy V8 1987-95 Saddle Mount YJ Wranglers PDF Installation Instructions
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