Stripped bolt hole in balancer. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kcfirstbuild · 10-11-2011, 09:40 PM

I did NOT strip the crank, but one of the three the bolt that hold the pulleys on. I'm going to try and run a 3/8-24 tap through to clean it up, but if that doesn't work.
Since I still have two good 3/8 holes and the crank bolt / larger washer will i be ok not using the third 3/8 stripped hole. Or will that mess up the balance?

Could i use a smaller bolt and nut it on the back side?

Last result is heil coil it, its just in a horrible place.

Hubscrub · 10-11-2011, 09:45 PM

I was going to recommend a heli coil, i have used them with great success. i used one awhile back on a outer head bolt with no problems.

bigsnookmaster · 10-11-2011, 10:06 PM

Try a longer bolt in all three holes, just check to see if it comes too far out the other side. Sometimes you might have extra thread past the stripped area. .02

kcfirstbuild · 10-11-2011, 10:14 PM

i cranked on it and it messed it up good

mcbassin · 10-11-2011, 10:44 PM

Use a heli-coil. Or you could do like BigSnook said and try a longer bolt. Maybe you could tap it a little
deeper with a standard 3/8-24?

stealthy '69 · 10-11-2011, 10:49 PM

wouldn't the weight difference of the heli-coil affect the accuracy of the balancer? If you plan on reusing the balancer I would think it would throw it off a little. if you are replacing it with a new one, then yea I'd say a longer bolt or heli-coil. That's just my thoughts though.

kcfirstbuild · 10-11-2011, 11:12 PM

Its a brand new balancer, that I missed up. So don't really want to remove it and throw it. How bad would it throw it off if i put a longer smaller bolt with a nut on the back side ?

kcfirstbuild · 10-11-2011, 11:56 PM

Other advice ?

RustyBucket · 10-12-2011, 12:51 AM

a helpful guy in the fastener supply business MIGHT just be able to tell you that there is a metric bolt the right diameter to fit the damaged hole. You might have to pass the right size drill bit and then tap it with a metric tap. I've stripped treads in some Jap motorcycle stuff and tapped it to S.A.E. ..... didn't even have to redrill it. 'Course it WAS in aluminum. GOOD LUCK!

kcfirstbuild · 10-12-2011, 08:38 AM

I thought of that in my sleep. I should be able to figure that out at work, what the next metric size is.

PanelDeland · 10-12-2011, 08:57 AM

A simple Dual system (Metric/SAE) bolt guage is $2-3 most places and can help in these problems.I have several and even keep one in my JYing toolbox.Get the one that has pegs for the nuts on the outside.

MARKDTN · 10-12-2011, 09:51 AM

No way I would bolt and nut on the backside. This is a balanced part. If a helicoil won't work, I would get a new one. They are not that expensive.

TobyArnot · 10-12-2011, 01:45 PM

Put a Heli-Coil in all three holes. No Foul!

**john** · 10-12-2011, 01:58 PM

Quote:

Originally Posted by TobyArnot

Put a Heli-Coil in all three holes. No Foul!

Good advice.

hayhauler71 · 10-12-2011, 03:18 PM

drill all three and retap all three with all the same bolts done

DorianB · 10-12-2011, 04:02 PM

You should be able to run the right size bolt through the back of the balancer and it may help clean out the threads so you can get the bolt going in correctly. (Don't ask me how I know this, but it does work

)

stealthy '69 · 10-12-2011, 08:05 PM

Am I wrong in assuming the 3 bolt holes are for installing/removing the balancer? It's been a long time since I had to mess with one. If that's the case then I would think a bolt all the way through and remove it when you're finished, would work ok.

kcfirstbuild · 10-12-2011, 08:14 PM

all fixed up ! I ran a 3/8 24 tap through it cleaned up the first couple threads. I did get a longer bolt cause i did notice the threads near the end of the hole were still good like you said. So presto ! All done !

stealthy '69 · 10-12-2011, 08:16 PM

cool glad you got it all fixed up. I just went out and looked and realized they bolt holes are for the pulley too. DUHH!!

mcbassin · 10-12-2011, 10:46 PM

Quote:

Originally Posted by kcfirstbuild

all fixed up ! I ran a 3/8 24 tap through it cleaned up the first couple threads. I did get a longer bolt cause i did notice the threads near the end of the hole were still good like you said. So presto ! All done !

Good job! glad that worked out for you. If you were worried about it causing balance issues, you could chase all three deeper and use the same length bolts on all three.

10-11-2011, 09:40 PM	#1
kcfirstbuild Registered User Join Date: Aug 2009 Location: Red Wing Mn Posts: 526	Stripped bolt hole in balancer. I did NOT strip the crank, but one of the three the bolt that hold the pulleys on. I'm going to try and run a 3/8-24 tap through to clean it up, but if that doesn't work. Since I still have two good 3/8 holes and the crank bolt / larger washer will i be ok not using the third 3/8 stripped hole. Or will that mess up the balance? Could i use a smaller bolt and nut it on the back side? Last result is heil coil it, its just in a horrible place.

10-11-2011, 09:45 PM	#2
Hubscrub Cruzin Join Date: Dec 2009 Location: on the road Posts: 2,835	Re: Stripped bolt hole in balancer. I was going to recommend a heli coil, i have used them with great success. i used one awhile back on a outer head bolt with no problems. __________________ Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14

10-11-2011, 10:06 PM	#3
bigsnookmaster Registered User Join Date: Jan 2008 Location: St.Petersburg,Fl Posts: 1,267	Re: Stripped bolt hole in balancer. Try a longer bolt in all three holes, just check to see if it comes too far out the other side. Sometimes you might have extra thread past the stripped area. .02 __________________ greg http://community.webshots.com/user/68406Stepside

10-11-2011, 10:14 PM	#4
kcfirstbuild Registered User Join Date: Aug 2009 Location: Red Wing Mn Posts: 526	Re: Stripped bolt hole in balancer. i cranked on it and it messed it up good

10-11-2011, 10:44 PM	#5
mcbassin Still Learning Join Date: Jul 2009 Location: Central Oklahoma Posts: 10,108	Re: Stripped bolt hole in balancer. Use a heli-coil. Or you could do like BigSnook said and try a longer bolt. Maybe you could tap it a little deeper with a standard 3/8-24? __________________ Mike "69 Short Wide" My Project 86 Silverado Landen's Project Instagram: @mcbassin My Website C/10 Club Oklahoma Facebook Group

10-11-2011, 11:12 PM	#7
kcfirstbuild Registered User Join Date: Aug 2009 Location: Red Wing Mn Posts: 526	Re: Stripped bolt hole in balancer. Its a brand new balancer, that I missed up. So don't really want to remove it and throw it. How bad would it throw it off if i put a longer smaller bolt with a nut on the back side ?

10-11-2011, 11:56 PM	#8
kcfirstbuild Registered User Join Date: Aug 2009 Location: Red Wing Mn Posts: 526	Re: Stripped bolt hole in balancer. Other advice ?

10-12-2011, 12:51 AM	#9
RustyBucket Registered User Join Date: Jul 2009 Location: Space Coast, Fl. Posts: 1,050	Re: Stripped bolt hole in balancer. a helpful guy in the fastener supply business MIGHT just be able to tell you that there is a metric bolt the right diameter to fit the damaged hole. You might have to pass the right size drill bit and then tap it with a metric tap. I've stripped treads in some Jap motorcycle stuff and tapped it to S.A.E. ..... didn't even have to redrill it. 'Course it WAS in aluminum. GOOD LUCK! __________________ Dad always said, "Son, WISH IN ONE HAND, and ......." -------------------------------------- -------------------------------------- Current toy trucks: '71 GMC 1500 SUPER CUSTOM short/step, orig. dk. blue, 350/700r, ps,pb, A/C '72 Blazer 2wd, ochre & white, 454, tremecTKO 500 5spd. ps, pb, A/C, tilt Last 10yrs of hobby vehicles, had a FEW more in the 50yrs. before these: '66 Plymouth Belvedere City of Miami cop car clone. '70 Nova 406"sb, 13.5-1, solid roller, Brodix, p.glide/t.brake, back halved, 9" Ford, spool 4.88, cage,ladder bar/coilover, 10.5 tire....... SOLD!! '67 C10 short/step side mount spare -- SOLD!! '72 Jimmy 2wd, 350/350, ps, pb, fun driver, lots of bondo & a shiny red paint job..... SOLD!! '69 Nova 350, 4spd, A/C, ps, p.b, ...SOLD!!

10-12-2011, 08:38 AM	#10
kcfirstbuild Registered User Join Date: Aug 2009 Location: Red Wing Mn Posts: 526	Re: Stripped bolt hole in balancer. I thought of that in my sleep. I should be able to figure that out at work, what the next metric size is.

10-12-2011, 08:57 AM	#11
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: Stripped bolt hole in balancer. A simple Dual system (Metric/SAE) bolt guage is $2-3 most places and can help in these problems.I have several and even keep one in my JYing toolbox.Get the one that has pegs for the nuts on the outside. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

10-12-2011, 09:51 AM	#12
MARKDTN Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 2,159	Re: Stripped bolt hole in balancer. No way I would bolt and nut on the backside. This is a balanced part. If a helicoil won't work, I would get a new one. They are not that expensive. __________________ '83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project

10-12-2011, 01:45 PM	#13
TobyArnot Quit if it's not FUN!!! Join Date: Jul 2010 Location: Indian Trail, N.C, Posts: 864	Re: Stripped bolt hole in balancer. Put a Heli-Coil in all three holes. No Foul!

10-12-2011, 03:18 PM	#15
hayhauler71 Registered User Join Date: Aug 2009 Location: St. Paul MN. Posts: 1,996	Re: Stripped bolt hole in balancer. drill all three and retap all three with all the same bolts done __________________ Fuzzy

10-12-2011, 04:02 PM	#16
DorianB Registered User Join Date: Apr 2010 Location: Buford, Ga Posts: 205	Re: Stripped bolt hole in balancer. You should be able to run the right size bolt through the back of the balancer and it may help clean out the threads so you can get the bolt going in correctly. (Don't ask me how I know this, but it does work )

10-12-2011, 08:14 PM	#18
kcfirstbuild Registered User Join Date: Aug 2009 Location: Red Wing Mn Posts: 526	Re: Stripped bolt hole in balancer. all fixed up ! I ran a 3/8 24 tap through it cleaned up the first couple threads. I did get a longer bolt cause i did notice the threads near the end of the hole were still good like you said. So presto ! All done !



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