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Q:

is the main pully bolt right or left hand thread. I can not break it loose on 1998 Chevrolet Metro

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I csn not break the main pully bolt loose. Trying to replace the watter pump.
(2) Answers
The crankshaft pulley bolt on your 1998 Chevrolet Metro should be standard right hand thread - clockwise to tighten and counter clockwise to loosen.
The bolt is right hand thread. It is hard to hold the engine from turning to remove this bolt. I use an impact to do it and I have had to use a 3/4" one on some.

Steve