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If you hear that the bottom end is knocking can you get away with just changing rod bearings?

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Answer

The answer in a nutshell is... NO !!

Knocking indicates excessive clearances between the rod bearing & crankshaft journals. These two areas will develope an out-of-round condition, wich MUST be machined back to acceptable tolerances.

Any competant auto machine shop can perform this for you, & fit new bearings that will last a long time.

Just putting new bearings will quite the engine for a short time, but will fail quickly, putting you right back in the same situation in short order!

The time and money spent on just new bearings will have been wasted.

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