Harmonic balancer
Thread Starter
Intermediate
Joined: Jan 2026
Posts: 28
Likes: 4
Harmonic balancer
After some reading I decided to take a look at my Harmonic Balancer. I has a bit of a wobble. So now, there seems to be an endless list of suppliers. Is there any feedback on the best one for the value? This is my project for next weekend if I can get one soon enough. I live 1/2 hour from Summit in the Reno area.
Heel & Toe
Joined: Dec 2022
Posts: 23
Likes: 22
From: Central Ohio
I replaced mine with a Dayco PB1117N. It’s a stock replacement with a revised rubber compound.
I put the car on jackstands and replaced it by dropping the cradle. Was pretty straight forward. There’s a video on YouTube that shows how to do it. That car is a C6 but the steps are the same.
I put the car on jackstands and replaced it by dropping the cradle. Was pretty straight forward. There’s a video on YouTube that shows how to do it. That car is a C6 but the steps are the same.
Thread Starter
Intermediate
Joined: Jan 2026
Posts: 28
Likes: 4
One other thing, I was a tech/shop owner (and yes I swept the floors as well) for 35 years. A long time ago I replace the cam and followers on an old (pretty new back then) 1974 Ford Mustang II by removing the motor mount bolts and carefully lifting the engine using a floor jack and some wood. That gave me enough space to pull the camshaft out over the top of the radiator and save me a ton of time. Perhaps the same can be done on my '99 C5 by raising the engine enough to get the balancer to pull straight out over the steering rack? I haven't looked at it closely yet but has anyone ever tried to get the balancer out this way? It would be a huge time saver it could be done, just wondering.
Team Owner
Joined: May 2001
Posts: 87,361
Likes: 1,592
From: Western NY
One other thing, I was a tech/shop owner (and yes I swept the floors as well) for 35 years. A long time ago I replace the cam and followers on an old (pretty new back then) 1974 Ford Mustang II by removing the motor mount bolts and carefully lifting the engine using a floor jack and some wood. That gave me enough space to pull the camshaft out over the top of the radiator and save me a ton of time. Perhaps the same can be done on my '99 C5 by raising the engine enough to get the balancer to pull straight out over the steering rack? I haven't looked at it closely yet but has anyone ever tried to get the balancer out this way? It would be a huge time saver it could be done, just wondering.
FWIW, I went with the ATI balancer.
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From: Dyer, IN
Race Director
Joined: Oct 2004
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I've run an ASP 25% UD balancer for around 20 years/90,000 miles. Ii still have my original alternator, PS pump, and A/C compressor, after 26 years and 150,000+ miles. The UD balancers work fine on the street.... BUT-I don't recommend a 25% unit in the southern border states, especially without a tune and with a stock radiator. A tune is one of the best things you can do for a stock C5. If going with a 25% unit, have a tuner slightly increase idle rpm when the A/C is on. If you don't, the A/C compressor can spin slow enough to trigger a low pressure/low refrigerant situation, and the compressor will disengage. This is all not nearly as complex as it may seem. Personally, I'd say that if I had to do this over again Id probably go with a 10% UD. My opinion, and best of luck to you.