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12-02-2016 03:32 PM #1
CHR Junior sMember
- Join Date
- Dec 2016
- Location
- Proctorville
- Car Year, Make, Model: 1969 Mustang
- Posts
- 1
Ford 428 Cobra Jet Exhaust Backfire / Now 85 Pound compression - all 8 Cylinders
Due to a slipped Harmonic Balancer it backfired extremely hard. Trashed both mufflers. All valves operating, timing chain is chain is OK. Any idea what could cause the compression issue. Ran perfectly before. Stock engine.
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12-02-2016 05:22 PM #2
CHR Member
- Join Date
- Jun 2007
- Location
- New Market
- Posts
- 2,590
iv`e had balancers explode on my 351 with no adverse affects on anything else .. kinda odd you feel it killed your compression .. have you fixed it and ran it since ?iv`e used up all my sick days at work .. can i call in dead ?
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12-02-2016 05:40 PM #3
CHR Member
- Join Date
- Feb 2006
- Location
- Bartlett
- Posts
- 6,831
cam timing issue----------sheared crank key, Cam dowel pin(most likely) just plain put together wrong chain timing-----------
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I'm happy to see it back up, sure hope it lasts.
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