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Old 08-08-2005, 10:58 PM
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non-threaded crank snout

I am currently assembling a 327 SBC and discovered that the snout on the crank is not threaded and appears to have been machined that way. This has got me stumped as to how I can install a harmonic balancer so that it will be secure without a bolt and washer. Is it possible to safely press it on and will it remain secure? Or does it need to be drilled and tapped? Has anyone ran across this situation and successfully remedied it?

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Old 08-08-2005, 11:10 PM
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327s had a press on balancer
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Old 08-09-2005, 01:22 AM
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Just drill it and tap it,the same size as a 350 cranksnout, I see our crankshaft grinder do it all the time.
He uses a 1/2" drillmotor and has someone watch and tell him if he is drilling crooked...
283/early 327's had press on balancers....another GM better idea
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Old 08-09-2005, 06:27 AM
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Quote:
Originally Posted by fairlane2k
283/early 327's had press on balancers....another GM better idea
Ever hear of one coming off?.....................didn't think so................
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Old 08-09-2005, 07:05 PM
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hey Punchy...

As a matter of fact, YES...I have seen a few of them come off....
but then again....building engines is my profession
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Old 08-09-2005, 07:11 PM
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They are just press on on that engine, however as all ready suggested, I would drill and tap it and put a bolt and washer on it. If you are afraid to tackle that yourself, just get a machine shop to do it for you.
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Old 08-09-2005, 08:16 PM
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Quote:
Originally Posted by poncho62

Ever hear of one coming off?.....................didn't think so................
I have seen 1 too many come flying out.

Mr. Gasket used to make a kit that contained a drill bit, bolt and washer. It told you how deep to drill and what size tap was needed.

Most every respectible hot roder has a tap set with the correct tap or has a "FRIEND" that does.
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Old 08-09-2005, 09:18 PM
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Funny... none the less that little flying balancer engine is still the most widely used power plant for performance use and every day...

BTW the engineers never intended for a SBC to spin or produce near the HP that people got out of them... Also we change things on any engine to make them survive the abuse we do to them...
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