Harmonic balancer install tool

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Mar 18, 2024 | 06:01 PM

CubeBrick

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From: Croatia

Harmonic balancer install tool

This is a question for all of the machinists out there. I need to install the harmonic balancer and I have the opportunity to borrow a tool and it is 7/16-16 thread. But from reading online c3s have 7/16-20 thread. As I do not understand those measurements my question is will 7/16-16 bolt from the tool fit into 7/16-20 crank hole.

car is 1979. L82

Thanks

Mar 18, 2024 | 06:58 PM

Fly skids up!

Melting Slicks

Joined: May 2021

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From: Fleming Island, FL

7/16" is the diameter of the bolt. The 16 or/and 20 represents the number of threads in one inch. You need the 7/16-20 installer.

Mar 19, 2024 | 10:51 AM

lars

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From: At my Bar drinking and wrenching in Lafayette Colorado

Quote:

Originally Posted by CubeBrick

my question is will 7/16-16 bolt from the tool fit into 7/16-20 crank hole.

No, you cannot crossthread a 7/16-16 bolt into a 7/16-20 hole. Get the right tool. Good installer tools come with a variety of thread inserts, including 7/16-20.

Mar 19, 2024 | 01:05 PM

Barry's70LT1

Melting Slicks

Joined: Oct 2001

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From: Halifax, Nova Scotia, Canada

This is my very uncomplicated balancer install tool, two bolts welded together. Made it many years ago.

Mar 19, 2024 | 03:06 PM

CubeBrick

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From: Croatia

Quote:

Originally Posted by Barry's70LT1

This is my very uncomplicated balancer install tool, two bolts welded together. Made it many years ago.

I already ordered the right tool but I’m interested how this works exactly? Bolt heads fit through balancer hole?

Mar 19, 2024 | 07:40 PM

Barry's70LT1

Melting Slicks

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From: Halifax, Nova Scotia, Canada

One end screws into the crank shaft. Place the balancer over the install bolt and start the balancer on the end of the crank. Bolt/installer protrudes thru balancer. Place washer(s) over bolt, spin on nut and tighten nut which will press on the balancer.
Depending on the length of the bolt you use, you might have to back off the install nut and add a few more washers during the process.

Mar 19, 2024 | 08:08 PM

drwet

Melting Slicks

Joined: Dec 2009

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From: Thunder Bay

If you put the balancer in the oven for about an hour at about 180 degrees (preferably when your wife isn't home - ask me how I know), it will slip on a lot easier.

Mar 19, 2024 | 09:30 PM

lars

Tech Contributor

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From: At my Bar drinking and wrenching in Lafayette Colorado

You do that after you have run it through the dishwasher on the potscrubber cycle. Throw your valve covers in there with the balancer. You do that when your wife is not home, too. Ask me how I know.

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Mar 19, 2024 | 10:28 PM

socal_tom

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one is course the other is fine thread , not interchangeable

Mar 19, 2024 | 10:30 PM

#10

socal_tom

Drifting

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Hey Lars dam funny doing it while your wife is not home

Mar 19, 2024 | 10:33 PM

#11

socal_tom

Drifting

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drwet
baking car parts while the wife is out in the oven . 2 thumbs up for you

Mar 20, 2024 | 02:00 AM

#12

CubeBrick

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From: Croatia

My wife doesn’t cook, so… I guess it is my owen

Mar 20, 2024 | 05:22 AM

#13

4-vettes

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I do all the cooking in our house as well, plenty of times a pair of Harley heads are in the oven heating up while valve guides are in the freezer!
maybe that's why I have so many ex wifes, I don't care if there home!

Mar 20, 2024 | 05:51 AM

#14

CubeBrick

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From: Croatia

Here are mine, also baked in family oven, before and after the baking

Mar 20, 2024 | 08:17 AM

#15

stingr69

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From: Little Rock AR

Quote:

Originally Posted by 4-vettes

Like a BOSS!

Mar 20, 2024 | 11:34 AM

#16

ctmccloskey

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From: Fairfax Virginia

I bought a second full size oven and put it in my garage. I removed the burners from the top and only use the oven part. This allows me to powder coat in my garage. AND it keeps my dear wife happy.....

Mar 20, 2024 | 02:27 PM

#17

Kevman72GT6

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I used this one

# 66515 Harmonic Balancer Installer Tool for Chevy SBC BBC Cranks, Sturdy Puller Vibration Damper Crank Pulley Installation Tool Compatible with SBC BBC Small & Big Block Cranks, Harmonic Balancers - Amazon Canada

I modified it to fit between the electric fan in the stock shroud, and it worked great.

Mar 20, 2024 | 03:44 PM

#18

CubeBrick

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From: Croatia

Quote:

Originally Posted by Kevman72GT6

I used this one
# 66515 Harmonic Balancer Installer Tool for Chevy SBC BBC Cranks, Sturdy Puller Vibration Damper Crank Pulley Installation Tool Compatible with SBC BBC Small & Big Block Cranks, Harmonic Balancers - Amazon Canada

I modified it to fit between the electric fan in the stock shroud, and it worked great.

That’s weird cause this is th one I could rent and it says here:

And in my case this is the wrong one or there are two types of 66515, one with 7/16-16 thread and one with 7/16-20.

In any case I found that the one with correct thread is part number 6291-1.

Mar 21, 2024 | 01:30 PM

#19

Kevman72GT6

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Quote:

Originally Posted by CubeBrick

That’s weird cause this is th one I could rent and it says here:

And in my case this is the wrong one or there are two types of 66515, one with 7/16-16 thread and one with 7/16-20.

In any case I found that the one with correct thread is part number 6291-1.

The one from Amazon worked for me... Last week. And I've got a Corvette crank shaft, from the engine and rotating assembly that came from the car.

You can see in the photo it's a fine thread.

Mar 21, 2024 | 04:37 PM

#20

71 Vert LS1

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Depending on how often you will use it Oreilly's "loans" tools. All you have to do is give them a credit card to cover the cost of the tool if you damage it or don't return it.

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