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Old 09-25-2015, 02:38 PM   #51
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Well! lesson learned the hard way, my 2006 with 240,000 just let go of it's 2nd harmonic balancer, the 1st was at 235,000 and unbeknownst to me at the time I went to my local CARQUEST auto parts and ordered the replacement, now I know about the made in China junk, it lasted less than 6000 miles before coming apart while stopping at the mailbox at the bottom of our driveway after doing around 100 miles plus yesterday, talk about good timing! I made it home. I'm not happy about having to take it apart again but thank goodness the guys at Europartssd.com here in SD have all the needed parts in stock! I my opinion, in order to correctly torque the bolt you can't do it without removing the radiator, intercooler, etc... to gain easy access to the front of the balancer and bolt, neither the 3/4" drive monster torque wrench or breaker bar will fit between the radiator shroud and front of the pulley so it all comes apart...again.

My 2nd one came apart after only 5000 or so miles, Dorman made in China junk. I didn't know any better at the time, but don't get anything but the factory replacement. The original one lasted 230,000 plus and made the funny noise and took a while to figure it out, never separated, the replacement Dorman one made noise for about 30 seconds before coming apart and taking out the serpentine belt! Europartssd.com had all the factory parts in stock here in town! I know what I'm doing today! again!

Last edited by hkpierce; 09-25-2015 at 05:37 PM.
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Old 09-25-2015, 03:58 PM   #52
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Default Re: T1N Harmonic Balancer Failure

Curious as to how many folks here with this harmonic balancer failure has rumble strip issues or perhaps have performed the DARF mod?

I have read in the past that perhaps rumble strip vibrations emitted by the transmissions can lead to the balancer coming apart over time due to these vibrations that resonate through the entire chassis.
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Old 09-25-2015, 05:30 PM   #53
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Default Re: T1N Harmonic Balancer Failure

No need to remove radiator. Shroud, yes.
I believe mine was dry rotted. Only a little over 100k miles, but 11 years in the heat of the south.
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Old 06-23-2016, 02:51 AM   #54
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Default Re: T1N Harmonic Balancer Failure

Guess it's not really emphasized in this thread but there are 2 maybe 3? harmonic balancer failure modes;
The garden variety rubber separating failure discussed here, typically gives some warning vibration and noise. Often the smooth outer weight exits with little ancillary damage?
The Broken spokes failure. Is this closely related to rear air, or maybe high electrical loads? Now the belt and sharp broken part can do some hurt as loose parts thrash about.
Key/keyway failure, the rarest but most damaging failure, typically requiring crankshaft replacement.

That sound about right?
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Old 06-23-2016, 01:40 PM   #55
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Default Re: T1N Harmonic Balancer Failure

I would like to point out that keyway failure is almost always a secondary affect caused by a broken or under torqued pulley bolt.

Make sure you follow the tightening regime exactly! "Good and tight is good enough" is bad!
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Last edited by Midwestdrifter; 06-23-2016 at 02:13 PM.
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Old 06-23-2016, 02:20 PM   #56
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Default Re: T1N Harmonic Balancer Failure

My HB failed on my 2005 at about 90k, the rubber ring failed letting the outer ring freewheel and cut the transmission line. Lucky for me at the time I had the 100k warranty. Sucked being on the side of the road for hours and having to have it towed on a roll-off 100 miles. Yes these HB do come apart.-
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Old 06-23-2016, 03:20 PM   #57
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Default Re: T1N Harmonic Balancer Failure

OK you guys made me look. hmmm..............

Picture_20163323093348.jpg Picture_20163223093215.jpg

Picture_20163223093258.jpg

04 150K miles

no obvious broken rubber but lines where it meets the steel....
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Old 06-23-2016, 03:31 PM   #58
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Default Re: T1N Harmonic Balancer Failure

My sprinter with 100k miles shows a bit of what you have. It is really well attached still though...
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Old 06-23-2016, 03:59 PM   #59
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Default Re: T1N Harmonic Balancer Failure

I replaced mine at about 115k, '04. It was making noise and rubber was beginning to separate. If it were me, I'd start getting all the parts ready and planning a weekend day. Hardest thing to get is going to be the flywheel tool. Not that it's hard, just everything else is easier. Local dealers had most in stock or next day.
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Old 07-16-2016, 10:16 PM   #60
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Default Re: T1N Harmonic Balancer Failure

Quote:
Originally Posted by Midwestdrifter View Post
My sprinter with 100k miles shows a bit of what you have. It is really well attached still though...
Update, I can move the outer ring in/out about 3/32" with one hand. Time to replace I think.
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