10-31-2016, 08:12 PM | #1 |
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327 Harmonic balancer
Rebuilding a 327 and noticed there is no bolt or threads in the crankshaft that holds the balancer in place. I check a 350 on an engine stand nearby and it has a 1 1/2 fine threaded bolt and a 1/4 inch washer on the crankshaft holding the balancer and pulleys in place. Is this supposed to be?
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cascadeheavychevy 67 C10 327 4speed 69 C20 350 4WD 4speed 69 C20 350 4WD 4speed 69 C20 350 4 soeed 69 C20 CST 350 Auto 70 C10 307 4speed 71 GMC Supr 350 Auto 70 C10 350 Auto 67 CST 327 Auto |
11-01-2016, 09:07 AM | #2 |
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Re: 327 Harmonic balancer
Yes your 327 Harmonic balancer was pressed on, nothing unusual about it
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11-01-2016, 11:18 AM | #3 |
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Re: 327 Harmonic balancer
Thanks jrainman I have not worked on a 327 before and thought the missing bolt was odd. Very simple explanation.
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cascadeheavychevy 67 C10 327 4speed 69 C20 350 4WD 4speed 69 C20 350 4WD 4speed 69 C20 350 4 soeed 69 C20 CST 350 Auto 70 C10 307 4speed 71 GMC Supr 350 Auto 70 C10 350 Auto 67 CST 327 Auto |
11-01-2016, 02:28 PM | #4 |
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Re: 327 Harmonic balancer
Ive been driving my 64 impala SS for 10 years now with a press on one for the rebuild with no issues.
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11-01-2016, 02:29 PM | #5 |
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Re: 327 Harmonic balancer
If I remember correctly,the high performance engines got the bolt.
In 67,I believe all small blocks got it. My original 68,C-10 with 327 has the bolt in it. Mike. |
11-01-2016, 07:41 PM | #6 |
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Re: 327 Harmonic balancer
Hmmm! The 327 engine I am working on is a 69 with a 68 date code. Then I check a 69 with a 307 and it has no bolt. All the 350 4 bolt blocks I checked have a bolt. Interesting.
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cascadeheavychevy 67 C10 327 4speed 69 C20 350 4WD 4speed 69 C20 350 4WD 4speed 69 C20 350 4 soeed 69 C20 CST 350 Auto 70 C10 307 4speed 71 GMC Supr 350 Auto 70 C10 350 Auto 67 CST 327 Auto |
11-01-2016, 09:38 PM | #7 |
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Re: 327 Harmonic balancer
As I recall, most of the small journal motors had press on balancers. They usually had short water pumps too. I think 67-68 were the cross over years where you could get either style.
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11-02-2016, 09:56 AM | #8 |
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Re: 327 Harmonic balancer
Yes small journal ( Steel crank ) got the pressed on , large journal (cast crank ) got bolted
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