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Author Topic: Hydraulic Cam Chain Tensioners failure  (Read 13656 times)

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FR8TRN

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Hydraulic Cam Chain Tensioners failure
« on: April 29, 2010, 02:56:52 PM »

Not mine, from a guy on the Road King Forum but thought I'd post it over here for ya'll to see.......

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Fired00d

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #1 on: April 29, 2010, 03:07:40 PM »

Hmmmm... so much for improvements. :( I'm glad I went gear drive.

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Twolanerider

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #2 on: April 29, 2010, 03:20:18 PM »

Do you remember if thread said any more about the engine.  While it's obviously a wear item (which, you've got to admit, is questionable for something that can lead to critical failure inside the engine) it's easy enough to see factors that might impact that wear.

First thing that comes to mind is that since it's a hydraulically pressured pad if someone had changed oil pumps to have higher than OE spec oil pressure the OE pad would wear faster.  So just wondering if this was a bone stock failure or a failure after the engine might have had some other tweaking.
« Last Edit: April 29, 2010, 03:41:32 PM by Twolanerider »
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FR8TRN

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #3 on: April 29, 2010, 03:30:00 PM »

I asked that question on the original thread, will see what the response is.  I'm wondering because I have the Zippers oil pressure relief valve thing on my '07 Ultra, oil pressure runs up close to 60 most of the time at speed.....30 or so at idle...
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Twolanerider

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #4 on: April 29, 2010, 03:41:10 PM »

I asked that question on the original thread, will see what the response is.  I'm wondering because I have the Zippers oil pressure relief valve thing on my '07 Ultra, oil pressure runs up close to 60 most of the time at speed.....30 or so at idle...

While it's based on little other than the fact it sort of "looks" better and is "new" I've been willing to accept hope that the new tensioner system is in fact better than the piece we've dealt with for so long.  The way it's pressurized, however, has left me wondering for awhile if new springs or different pumps might be a problem though.  Just seems to make sense that if you push the shoe against the chain harder that the show will wear faster.
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FR8TRN

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #5 on: April 29, 2010, 04:11:09 PM »

While it's based on little other than the fact it sort of "looks" better and is "new" I've been willing to accept hope that the new tensioner system is in fact better than the piece we've dealt with for so long.  The way it's pressurized, however, has left me wondering for awhile if new springs or different pumps might be a problem though.  Just seems to make sense that if you push the shoe against the chain harder that the show will wear faster.

He says no changes to the motor besides Air Kit/Pipes and tuner, shouldn't have affected it.

Well I haven't put many miles on mine since increasing the OP, but I have a feeling I'll be back in it next winter anyways so I'll get a better idea then.
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grc

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #6 on: April 29, 2010, 08:09:46 PM »


On a positive note, at least the tensioner shoe didn't disintegrate into little chunks like the old style does.  And it did make it all the way to 50k miles, rather than fail at 20k like the old style.  Of course, it's still BS that H-D can't figure out how to make a simple tensioner shoe last as long as those folks over in Detroit and Dearborn.  Plenty of those automotive engines with similar tensioners still going strong at well beyond 100k, and some beyond 200k.

BTW, has H-D added tensioners to the routine maintenance schedule?  Seems strange to me that they tell us to tear down, inspect, and rebuild the front forks at 50k, but they don't mention anything about a critical piece of plastic in the engine.   :nixweiss:


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Re: Hydraulic Cam Chain Tensioners failure
« Reply #7 on: April 29, 2010, 08:13:07 PM »

On a positive note, at least the tensioner shoe didn't disintegrate into little chunks like the old style does.  And it did make it all the way to 50k miles, rather than fail at 20k like the old style.  Of course, it's still BS that H-D can't figure out how to make a simple tensioner shoe last as long as those folks over in Detroit and Dearborn.  Plenty of those automotive engines with similar tensioners still going strong at well beyond 100k, and some beyond 200k.

BTW, has H-D added tensioners to the routine maintenance schedule?  Seems strange to me that they tell us to tear down, inspect, and rebuild the front forks at 50k, but they don't mention anything about a critical piece of plastic in the engine.   :nixweiss:


Jerry

Harley still acts like (and seems to budget, build in some obsolescence and define warranty limits based on the idea that) that these machines will never see 50k miles.
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kraut

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #8 on: April 30, 2010, 02:24:07 AM »

could you publish the link to the original threat on Road King forum please? Couldn't find it  :nixweiss:
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FR8TRN

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #9 on: April 30, 2010, 08:49:15 AM »

could you publish the link to the original threat on Road King forum please? Couldn't find it  :nixweiss:

http://forums.delphiforums.com/Live2Ride/messages?msg=37446.1
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grandpadoc

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #10 on: April 30, 2010, 10:38:18 AM »

Hmmmm... so much for improvements. :( I'm glad I went gear drive.

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WVULTRA

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #11 on: May 09, 2010, 09:28:24 PM »

Wonder where the spring is?

If it's still in the tensioner, then installed incorrectly.

Saw pics very similar to this and the spring was still under the piston when it should have been on top.

 :oops:
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FR8TRN

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #12 on: May 09, 2010, 09:41:43 PM »

Wonder where the spring is?

If it's still in the tensioner, then installed incorrectly.

Saw pics very similar to this and the spring was still under the piston when it should have been on top.

 :oops:

HUH???  The spring inside the tensioner??  So you think HD built the motor wrong??  It says it was a stock bike....  I'm confused what you mean.
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WVULTRA

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #13 on: May 09, 2010, 09:48:14 PM »

If the spring was installed incorrectly by the tensioner manufacturer, H-D's installer on assembly line may not have had a clue........Human error?

Stranger things have happened.

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spydglide

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Re: Hydraulic Cam Chain Tensioners failure
« Reply #14 on: May 09, 2010, 10:32:41 PM »

Wonder where the spring is?

If it's still in the tensioner, then installed incorrectly.

Saw pics very similar to this and the spring was still under the piston when it should have been on top.

 :oops:
I would love to see some add'l. pics if you could let us know where we might find them.  This is all very disturbing to ole spyder.  Could cause me to start drinking again.  :drink: :oops: har. spyder
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