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compression test questions 200 1989

Well, I'm an all plugs out person. Test with wide open throttle. Test all twice, if consistant, add a couple of squirts of oil and retest as before. Note, as the engine is slanted, oil can settle to the side so test immediately after you add the oil. Increased numbers after oil test points to rings. If numbers are low suspect valves, but if numbers are low but within 10% likely just fair wear and tear.Two people make the job easier.






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