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Old 08-06-2001, 09:08 AM
Posts: n/a
Sky, years ago Ford had a technical bulletin out on the four cylinder engine as in my Ranger. It seems that heavy weight oil would not, indeed, let the lifters bleed down quickly enough. Of course, if the valve does not make contact with the seat it is unable to dissipate combustion heat and, yes, therefore may lead to burned valves.
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