GM Cutlass RWD 1970-1987 Repair Guide

Camshaft Bearings

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REMOVAL & INSTALLATION



263 V6 Engine

The front camshaft bearing may be replaced separately but numbers 2, 3, and 4 must be replaced as a completed set. This is because it is necessary to remove the forward bearings to gain access to the rearward bearings.

Camshaft Bearing Remover and Installer Set BT - 6409 and camshaft bearing pilot spacer; BT-7817 are available tools.

This set can be used to remove cam bearings with the engine either in or out of the car. To replace the bearings with engine in car, proceed as follows:

  1. To remove the front (No. 1) camshaft bearing, support the retainer in a vise and drive the bearing out using BT-6409-2 with driver BT-6409-7.
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  3. To install the bearing use the same tools but make certain that the oil hole in the bearing is in alignment with the oil hole in the retainer.
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  5. Install tool BT-6409-2 on handle BT-6409-7 and drive out No. 2 cam bearing.
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  7. Remove the No. 3 bearing in the same manner using BT-6409-3 handle BT-6409-7.
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  9. Remove the No. 4 bearing using puller BT-6409-8
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To aid aligning the bearings with the oil passages, place each bearing in the front of the bore with tapered edge toward the block and align the oil hole in the bearing with the center of the oil slot in the bore. Mark bottom of bearing. When installing the bearings, the mark will act as a guide.

Using pilot BT - 6409-1 will aid in installing the No. 4 and 3 bearings by preventing cocking of the bearings.

  1. Install No. 4 bearing using tool BT-6409-4.
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Drive the bearing in carefully, stopping to make certain that the oil holes are in alignment otherwise it is possible to drive the bearing in beyond the oil passage opening. Use a piece of3/32in. brass rod with a 90 degree bend at the end to check the oil hole opening.

  1. Install the No. 3 bearing using tool Bt-6409-3 carefully until the oil holes are in alignment.
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  3. Install the No. 2 bearing using tool BT-6409-2 carefully until the oil holes are in alignment.
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  5. Use a piece of 3 / 32 in. brass rod with a 90 degree bend at the end to check all oil hole openings. Wire must enter hole or the bearing will not receive sufficient lubrication.
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350 V8 ENGINE

The camshaft bearings must be replaced in complete sets. All bearings must be removed before any can be installed. No. 1 bearing must be removed before any can be installed. No. 1 bearing must be removed first, then No. 2, then 3, 4, and 5. When installing the bearings, No. 5 must be installed first, then 4, 3, 2, and 1. Camshaft Bearing Remover and Installer Set J-25262 is an available tool.

This set can be used to remove cam bearings with the engine either in or out of the car. To replace bearings with engine in car, proceed as follows:

The number one camshaft bearing is different than used on the gasoline engine.

  1. Remove camshaft and engine oil pan.
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  3. Install No. 1 Cam Bearing Remover and Installer J-25262-1 on handle J-25262-7 and drive out front cam bearing.
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  5. Place Pilot J-25262-6 on driver J-25262-7 and install No. 2 Cam Bearing Tool J-25262-2 on driver and drive out No. 2 bearing.
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  7. Remove No. 3 and 4 bearings in the same manner, using J-25262-3 and J-25262-4 removers.
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Each cam bearing is a different diameter and the correct sequence must be used both for removal and installation.

  1. To remove No. 5 bearing with engine in car, use puller J-25262-8.
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  3. To remove the injection pump driven gear bushings, drive both bushings at the same time from the rear to the front of the block using tool J-28439-2 and driver handle J-25262-7.
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To aid aligning bearings with oil passages, place each bearing in the front bore with tapered edge toward block and align the oil hole in the bearing with the center of the oil slot in the bore. Mark bottom of bearing. When installing the bearings, the mark will act as a guide. Failure to align oil hole could result in engine damage.

  1. Slide bearing pilot spacer on bearing pilot J-25262-6. For bearings 5, 4, 3, 2 put the driver J-25262-7 through the pilot J-25262-6, the screw the installer on the driver. Install the bearings as follows:
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  3. Place new No. 5 bearing on J25262-5 and drive the bearing in until the last white line on the driver is flush with the front face of the pilot.
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  5. Use a piece of 3 / 32 in. brass rod with a 90 degree bend at the end to check the oil hole opening as shown in Figure 6A3-2.
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  7. Remove J-25262-5 Installer and install J-25262-4. Place No. 4 bearing on installer and drive in until the next to last white line on driver is flush with pilot.
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  9. Follow the same procedure to install No. 3 and No. 2.
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  11. Install Tool J-25262-1 on Handle J-25262-7 and place No. 1 bearing on installer. Drive bearing in until it is flush with front face of block.
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  13. To install the injection pump bushings, align the holes in the bushings with the holes in the block. Install both bushings from the front; driving the rear bushing first, using the long end of tool J-28439-1 and driver handle J-8092. Drive the front bushing with the short end of J-28439-1.
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  15. Use a piece of 3 / 32 in. brass rod with a 90 degree bend at the end to check all oil hole openings. Wire must enter hole or the bearing will not receive sufficient lubrication.
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