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#1
04-17-2008, 01:52 PM
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stupid mistake-used coarse thread bolts in fine thread pulley/balancer holes
what a meat head mistake. i used coarse thread bolts to attached the pulley to the stock harmonic balancer...i realized this after 1000 miles and one bolt backed out and was hitting fan...bolt hole with backed out bolt is extremely stripped, not much to work with, others not in good shape. im gonna try to re-tap and see what is left of threads . should i:
a. re-tap and jb weld studs? b. replace balancer? i have a couple, but replacing the balancer would be a pita (not much room to work with and i fear cracking or damaging cover seal upon removal or installation opening another can of worms. done it before. c.? on the positive side i was relieved the banging noise from the bolt hitting the fan was an exterior engine problem...
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'74 formula 400, w/shaker (3 scoops) black deluxe interior, '70 406 balanced assembly, .30 trw slugs, moly rings, 4x heads 2.11/1.77 stainless valves, ra 4 cam, e-rpm intake, holley 750 vac. sec, msd hei, hooker headers w/ dual 3'' flowmaster 50 series ending at axle, t400 w/ GM6 convertor, transgo shift kit, b&m starshifter, 3.08 gears, centerlines, 265/50-15 bfg's rear and 235/60-15 front...yes im over cammed but it is still very fun... |
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#2
04-17-2008, 01:54 PM
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C: Drill and tap for Helicoil.
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Its ok to giggle and snicker, Dont laugh and point |
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#3
04-17-2008, 01:56 PM
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Just replace it for the peace of mind. Stock style balancers aren't that expensive and I wouldn't chance it.
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65 Lemans Street Car - 521, T400, 3.70 9". 10.13 @ 135. 3770 lbs. Drag Week ‘14, ‘15, ‘17 63 Lemans Race Car- 8.81 @ 151, 5.60 @ 123(SOLD) 67 Bonneville ragtop 74 Firebird - 455, e heads, TK0600 in process |
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#4
04-17-2008, 02:08 PM
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replace it
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#5
04-17-2008, 03:03 PM
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Hey at least you didn't screw up the threads on the balancer bolt.
N-N-Not that I've ever seen that happen before...
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 ___________________________________ "Objects in mirror are closer than they appear" 
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#6
04-17-2008, 03:17 PM
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M-M-Me neither-
Who would do something boneheaded as that? I dunno either, but word gets around...guys talk...you hear things...
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#7
04-17-2008, 06:54 PM
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Drill and tap all 4 holes for the next biggest bolt size in the fine threads and run those,drill the pulley holes for those fasteners as well.
Otherwise get a new balancer,the stockers are'nt that expensive compared to the damage a "make-do" fix can cause should it fail... 
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#8
04-17-2008, 08:00 PM
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replace the balancer if you jack the car up on stands you will be amazed how quick you can do it from the bottom!
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#9
04-17-2008, 08:13 PM
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How did you get them in there in the first place?
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#10
04-17-2008, 08:33 PM
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Quote:
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Good luck to the new owner of the Ventura II! Sold the car after 13+ years. Look for it on the Hot Rod Power Tour in the future as it's currently being re-configured as a Pro-Touring ride! 
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#11
04-18-2008, 01:52 AM
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rtanner did you have to remove sway bar and radiator/shroud?
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'74 formula 400, w/shaker (3 scoops) black deluxe interior, '70 406 balanced assembly, .30 trw slugs, moly rings, 4x heads 2.11/1.77 stainless valves, ra 4 cam, e-rpm intake, holley 750 vac. sec, msd hei, hooker headers w/ dual 3'' flowmaster 50 series ending at axle, t400 w/ GM6 convertor, transgo shift kit, b&m starshifter, 3.08 gears, centerlines, 265/50-15 bfg's rear and 235/60-15 front...yes im over cammed but it is still very fun... |
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