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

4.7SCFM@40psi3.3SCFM@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.

 

Welcome to the forum.If you intend to do a lot of garage work, or do painting, a jiter-bug takes 90cfm. A compressor that puts out 80-90cfm is good. this would equate to about 6-7 hp, 32 gal, 150psi storage. Go to Sears and ask the tool dept expert, and he/she can adivse you a lot better. Don't buy until you do some price comparison. get the most cfm. your current compressor will not turn the impack fast enough.