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post #1 of 23 (permalink) Old 05-12-2009, 12:23 AM Thread Starter
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Rod knock?

After riding some insanely twisty, bumpy, narrow, potholed, gravelly, backwoods, deserted, DREAMY goat trails (are you drooling yet?), the engine started getting a very obvious clanging. Took it to the shop, the shop manager thinks it might be rod knocking. They'll get to it tomorrow or Wednesday.

That ever happen to anyone? Glad I have the extended warranty. If it's really a rod problem, what does that involve?

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post #2 of 23 (permalink) Old 05-12-2009, 12:37 AM
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What year and how many miles on your bike? The obvious question is, was it low on oil? Never heard of this happening just out of the blue. I'm curious about the diagnosis...

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post #3 of 23 (permalink) Old 05-12-2009, 12:39 AM
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Quote:
Originally Posted by EQPlayer View Post
After riding some insanely twisty, bumpy, narrow, potholed, gravelly, backwoods, deserted, DREAMY goat trails (are you drooling yet?), the engine started getting a very obvious clanging. Took it to the shop, the shop manager thinks it might be rod knocking. They'll get to it tomorrow or Wednesday.

That ever happen to anyone? Glad I have the extended warranty. If it's really a rod problem, what does that involve?
You probably have the dreaded ACCT problem, but a dealer will tell you it is a rod knock and it will cost you about $2500.00 - $3000.00.

Replace the ACCT's with MCCT's and enjoy your ride. Use the extra money for a vacation!!!

MCCT

http://www.tocmanufacturing.com/Manu...nTensioner.htm


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post #4 of 23 (permalink) Old 05-12-2009, 03:07 AM Thread Starter
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Quote:
Originally Posted by fergy View Post
What year and how many miles on your bike? The obvious question is, was it low on oil? Never heard of this happening just out of the blue. I'm curious about the diagnosis...
2006, 39000 miles. Oil gets changed every 3k, and it's not low on oil.

The journey is the destination.

2006 VN750 (SOLD)
63160 miles
Mustang seat
R/R Relocate
MCCT
MF Battery
Red spark plug wires
Stainless Steel brake lines
Stiffer fork springs
Windshield
Givi bags, Wingrack mount
Voltmeter
GPS Mount
Pashnit sticker!
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post #5 of 23 (permalink) Old 05-12-2009, 08:55 AM
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I'd take a stab that you crshed some of the left side balancer dampers, which are delicate flowers. When those go, the engine can develop a really thunky sound that could be interpreted as just about anything bad. Not that fouled dampers aren't bad - folks have had the balancer grenade the crankcase. But it's a much simpler fix for your mechanic, so make sure s/he checks that as well.

C
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post #6 of 23 (permalink) Old 05-12-2009, 09:14 AM
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I would think it's the ACCT's also. I wouldn't expect dampers to go yet on an '06
A relatively easy fix, with either new springs, greasing them, or as Lance said, changing over to the manual type.


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post #7 of 23 (permalink) Old 05-12-2009, 09:33 AM
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Quote:
Originally Posted by EQPlayer View Post
After riding some insanely twisty, bumpy, narrow, potholed, gravelly, backwoods, deserted, DREAMY goat trails (are you drooling yet?), the engine started getting a very obvious clanging. Took it to the shop, the shop manager thinks it might be rod knocking. They'll get to it tomorrow or Wednesday. That ever happen to anyone? Glad I have the extended warranty. If it's really a rod problem, what does that involve?
Even makes me glad I purchased the extended warranty also, especially since they have discontinued the VN750... I still have a couple (2011) more years to go on my 06 too... Good speed & luck with the fix, and get back to those DREAMY goat trails... You are doing some riding with 39k on an 06, I only have about 16k on mine, but I have had to have a couple of summer time surgeries that kept me off the goat trails a bit...
Have a good one...Old Dog...

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post #8 of 23 (permalink) Old 05-12-2009, 09:50 AM
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<<After riding some insanely twisty, bumpy, narrow, potholed, gravelly, backwoods, deserted, DREAMY goat trails (are you drooling yet?), the engine started getting a very obvious clanging. >>

Hyper, under ordinary riding conditions I'd agree with you - but a couple of potholes and goat trails could mean the difference between life and death for a damper. Two of 'em are just plastic - they are easy to crush under the right (wrong?) riding conditions.

C
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post #9 of 23 (permalink) Old 05-12-2009, 10:02 AM
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To add to what Cindy said, wouldn't a "ticking" noise more accurately describe the ACCT's noise compared to the "clanging" noise he talks about? Might boil down to the description of the noise... and I guess it could be chain slap, (also bad) from badly functioning or non functioning ACCT's. Sounds serious either way.

Fergy
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Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
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post #10 of 23 (permalink) Old 05-12-2009, 11:36 AM
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Acct's are easy to diagnose with the grambo trick. That is what I would check out first.

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