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dpb

wrote:
how do the spec-s of an air impact wrench relate to the air
compressor?
i need to loosen a crankshaft pulley bolt that is torqued at 134 ft-
lb. on a 1998 honda civic LX. i have a sears craftsman 1.5hp 4-
gallon @90psi air compressor. i don't yet
have an air impact wrench. what should i look for in terms of psi
when i go to buy one, such that i can use that air compressor to drive
the impact wrench to loosen the bolt? tia.

The problem is you'll have adequate pressure but highly unlikely to have
sufficient volume (cfm) to drive a sizable impact wrench. Most will
need in the 7-9+ cfm range at 90-100 psi to come close to the spec's
you're wanting.

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