harmonic balancer procedure

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Apr 6, 2017 | 05:38 PM

#21

tri08sbc

Pro

Joined: Feb 2016

Posts: 628

Likes: 54

From: Adams Center, NY

I'm with you on that one.

Apr 7, 2017 | 12:19 AM

#22

Malfeitor

Racer

Joined: Mar 2015

Posts: 363

Likes: 95

From: Savannah GA

Quote:

Originally Posted by flyned

Anybody try helping re-install the HB by cooling the crank snout way down by application of dry ice while heating the HB? I have easy source of it and really do not want to have trouble or risk it getting tight while trying to put it on. If it work as well as some other applications, it may just push on by hand.
Thoughts?

It probably wouldn't hurt to cool the snout when installing, however I don't think you'll need to if you preheat the damper/hub assembly and parts are sized properly. The interference fit between the two parts is less than .001 (if memory serves) and preheating allows it to go on fairly easy with an install tool. When the engine is at operating temp, the crank and the damper hub expand at the same rate maintaining the interference/press fit. During the install, the crank is at room temp vs. 250 deg hub which is just enough to let it install without being a high pressure press fit. Also consider that if it does require a huge temp delta to install due to a higher interference between parts, if you ever have to remove it again you might have a difficult time since you can't cool it as when it was apart. If in doubt, measure or have the parts measured to ensure proper interference. You do not want to damage the crank snout, it could get ugly if you do. The snout is very precisley finish machined and/or ground.

Apr 9, 2017 | 09:34 AM

#23

B-Vette

Melting Slicks

Joined: May 2006

Posts: 2,303

Likes: 40

From: Edmonton Alberta

Some harmonic balancer part numbers that might help you out.

Stock:
Part Number 12560115 for LS3
Part Number 12635652 for LS2

Powerbond:
Part Number HB117-N Powerbond Premium OEM Replacement Balancer
Part Number PBU1117SS10 Powerbond Race Performance 10% Underdrive
Part Number PB1117-SS Powerbond Race Performance Balancer

ATI:
Part number for ATI balancer is ATI-917246.

ARP:
Part number for the ARP bolt is ARP-234-2503.

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