Service Manual, General Motors 4.3L Engine (TP ... - Kohler Power

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6-102 Marine/Industrial 4.3L Engine 35214 10. Measure the valve stem-to-guide clearance. Excessive valve stem-to-guide clearance may cause an excessive oil consumption and may also cause a valve to break. Insufficient clearance will result in noisy and sticky functioning of the valve and will disturb the engine assembly smoothness. 10.1. Clamp the J 8001 on the exhaust port side of the cylinder head. 10.2. Position the dial indicator so that the movement of the valve stem from side to side (crosswise to the cylinder head) will cause a direct movement of the dial indicator stem. The dial indicator stem must contract the side of the valve stem just above the valve guide. 10.3. Drop the valve head about 1.6 mm (0.063 in) off the valve seat. 10.4. Use light pressure and move the valve stem from side to side in order to obtain a valve stem-to-guide clearance reading. Refer to Engine Mechanical Specifications. Valve Guide Reaming/Valve and Seat Grinding Tools Required J 5830-02 Valve Guide Reamer Set J 8001 Dial Indicator Set 1. Measure the valve stem-to-guide clearance. Refer to Cylinder Head Clean and Inspect. 35214 2000 Marine/Industrial
Engine Marine/Industrial 4.3L 6-103 2. Improper valve stem (1) to valve guide (2) clearance may cause excessive oil consumption. Caution: Refer to Safety Glasses Caution in Cautions and Notices. Important: Exhaust valves with excessive valve stem-to-guide clearance must be replaced with the available service valve that has an 0.0774 mm (0.0305 in) oversize valve stem. The intake valves are NOT available with oversize valve stems. Replace the cylinder head if after using a NEW intake valve in order to measure the valve stem-to-guide clearance, the valve stem-to-guide clearance is not within specifications. 3. Use the J 5830-3 in order to ream the exhaust valve guide in order to achieve the correct valve stem-to-guide clearance. 4. Always recondition the exhaust valve seat after reaming the exhaust valve guide bores and installing new exhaust valves. 156172 480556 5. Inspect the valves for the following: • Burnt or damaged areas (1) • Undersize margain (2) • Bent stem (3) • Scoring or other damage to the stem (4) • Worn key groove (5) • Worn stem tip (6) 156174 2000 Marine/Industrial
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Service Engine Engine Model: Genera
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Table of Contents Caution Introduct
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Introduction This service manual pr
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Service Manual, General Motors 4.3L Engine (TP ... - Kohler Power

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