Isuzu Engine >> CYLINDER HEAD BOLT CAUTION
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Isuzu Engine >> CYLINDER HEAD BOLT CAUTION
Cylinder Head Bolt Caution On
Isuzu 2.6L Engines
A loose head bolt has been found to be the cause of coolant leaks on some Isuzu 2.6L engines. The leakage occurs at the center head bolt on the exhaust manifold side of the engine and seems to be caused by high engine temperatures. This heat may cause the head bolt to stretch and lose its clamping ability, allowing coolant to seep past the head gasket and into the combustion chamber. If the loosened bolt is not replaced, there is a possibility th at coolant deposits will accumulate on the exhaust valve's seating ace.
Correction of this situation requires removal of the cylinder head and complete inspection of the exhaust valves for deposits. Install a new head gasket and replace all head bolts. See the illustration below and torque bolts in sequence to 58-72 ft. lbs. All components must be torqued to specification prior to
adjusting the valve train. The engine may be rotated by the using a 17 mm wrench/socket on the power steering pulley nut. Cold valve adjustment specification for both intake and exhaust is .008.
The AERA Technical Committee
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