Worn Down Engines Valveguilde Seals
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If your car occasionally gives a puff of blue smoke upon starting or after letting off on a long exit ramp, this is the perfect time to change valveguide seals. Choices include the umbrella seal that moves up and down with the valve, the original factory o-ring, and varieties of positive seals. The seal on the right presses onto the head's valve boss; in this case machined down to 0.500-inch diameter. View Related Article
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