Cam chain breaks case cover
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Road Captain
Joined: Jun 2014
Posts: 653
Likes: 0
From: Whittier ca
Cam chain breaks case cover
other then the obvious.....i should have replaced the cam chain tensioner. Can anyonr offersome guidence as to how extensive the damage might be. And what may be involved with fixing my motor?.
obviouslyi need a new chain. Tensioner. Cams. Cover. Gasket.....what else may be effected?
im worried the valves got stuck open and the pistons may have hit them.
has this happened to any of you and if so what was needed to get you ridding again?
Seasoned HDF Member
Joined: Aug 2012
Posts: 17,750
Likes: 3,347
From: maine
Man, when you break something you don't mess around. Never seen one do that but usually you can hear it getting bad and fixed before that happens. Looks like it will be a good chance to do some upgrades. Good luck.
Extreme HDF Member
Joined: Feb 2015
Posts: 10,907
Likes: 8,758
From: Galt's Gulch - MI
Wow! You don't play when you grenade something
A teachable moment; were there any sounds indicating the cam chain was going to fail or was there no warning at all? How many miles on the ODO when she went?Fully agree with cggorman and Nemosengineer; I'd consider that a catastrophic failure and she's coming completely apart to be inspected and then a full from the ground up rebuild. Crank to Darkhorse, heads out for repair and porting, the works.
I am sorry to see what's happened to your ride...
Stellar HDF Member
Joined: Apr 2010
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From: northeast
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Grand HDF Member
Joined: Mar 2010
Posts: 3,949
Likes: 150
From: South of Mordor
apetterez, looks like its time to make any of those upgrades you've had digging at ya for some time now.
To avoid an issue like this, I want to pull the cam cover and inspect my tensioners. Few question for me and I would guess anyone else that wants to avoid this problem.
What kinda sound would I be listening for to tell this is coming?
Do the hydraulic tensioner wear as fast as the spring type? Usual mileage?
If changing out the tensioners is needed, does this involve replacing the push rods or is there a way to just replace the tensioners? I have the manual, just haven't researched this yet.
I know that a cam, pushrod and lifter upgrade should be considered, but that is something I am considering.
To avoid an issue like this, I want to pull the cam cover and inspect my tensioners. Few question for me and I would guess anyone else that wants to avoid this problem.
What kinda sound would I be listening for to tell this is coming?
Do the hydraulic tensioner wear as fast as the spring type? Usual mileage?
If changing out the tensioners is needed, does this involve replacing the push rods or is there a way to just replace the tensioners? I have the manual, just haven't researched this yet.
I know that a cam, pushrod and lifter upgrade should be considered, but that is something I am considering.
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Road Captain
Joined: Aug 2015
Posts: 578
Likes: 522
From: Durango CO
What year is your twin cam? Do you have the spring loaded cam chain tensioner? The hydraulic tensioner is much better but still not immune from failure.
The chain broke but did a failed tensioner cause the chain to break?
The chain broke but did a failed tensioner cause the chain to break?
Last edited by Durango Dave; Mar 15, 2017 at 07:50 AM.
Grand HDF Member
Joined: Mar 2010
Posts: 3,949
Likes: 150
From: South of Mordor
I don't know if this question was for the OP or not, but I have a 2010 Street Bob 96", which has the hydraulic tensioners to the best of my knowledge.