C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Harmonic balancer install question/issue

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Old Jun 19, 2025 | 04:30 PM
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Default Harmonic balancer install question/issue

Hi all,

I recently pulled motor due to a failed lifter. After alot of work and new parts im finally getting ready to re-install the motor in the car. Im running into a issue with my harmonic balancer that is making me nervous. Using a harmonic balancer tool I cannot get the balancer to seat flush with the timing cover. It leaves a 1/4in gap between the back of the balancer and the timing cover. It is a new oem spec balancer and I did use a double roller timing chain (cloyes 9-1145). All the research I've done says that the balancer should sit flat.

HOWEVER. I installed the old water pump and pulley and the belt alignment looks spot on... is the gap normal if the belt lines up? Any help on how to proceed would be appreciated since I planned to install the motor today and this is a big road block.



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Old Jun 19, 2025 | 05:27 PM
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Yeah, I just did mine, same timing set and balancer as yours. That is what mine looked like after install too. The belts line up so I would just send it. Don't forget to install the center bolt and matching washer!
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Old Jun 19, 2025 | 06:12 PM
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Originally Posted by marshallnoise
Yeah, I just did mine, same timing set and balancer as yours. That is what mine looked like after install too. The belts line up so I would just send it. Don't forget to install the center bolt and matching washer!
Yep I just wanted to show how far off the end of the crank it was without the washer blocking it. How important is the crank bolt anyway?? 😂 Im gonna send it then, thanks for the reassurance.
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Old Jun 19, 2025 | 06:13 PM
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Originally Posted by Ekays
Yep I just wanted to show how far off the end of the crank it was without the washer blocking it. How important is the crank bolt anyway?? 😂 Im gonna send it then, thanks for the reassurance.
Haha, I had the same thought about the bolt...It's freaking pressed on and keyed! But yeah, I put it back because GM. lol
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