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Honda 2.2L oil restrictor
Location of oil restrictor
Preventing Camshaft Seizure on 1990-’99 Honda FA22 Engines
Use the following information to reduce the possibility of seized camshafts on 1990-’99 Honda 2.2L FA22 engines. This engine uses a restrictor located in the deck of the cylinder block to meter the oil flow to the cylinder head.
The small hole in this restrictor may become partially blocked and limit the amount of oil flow to the cylinder head. Eventually lack of lubrication may cause a camshaft journal to score its camshaft bore and seize.
Some engine builders drill the existing restrictor to .062˝ (1.575 mm) to increase oil flow to the cylinder head and camshaft. Providing all other oil clearances are with specifications, this procedure prevents seized camshafts.
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