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You replace them. There is no adequate fix unless they are replace. The old ones have to be knocked out and this takes skill because you dont want them to fall into the block or damage the cylinders. And on most motors, excluding some 4 cylinders the motor has to be removed or engine has to be tilted to replace them. Attempting to do this w/o removing or tilting motor can result in engine damage or just wasted time in failure... and frankly its just a pain in the ass.

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16y ago

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