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Question on Hydraulic Timing Chain Tensioners #4676853
02/24/18 07:55 PM
02/24/18 07:55 PM
Joined: Jul 2007
Posts: 4,457
Midwest USA
LoneRanger Offline OP
LoneRanger  Offline OP

Joined: Jul 2007
Posts: 4,457
Midwest USA
Occasionally get a rattle upon start up that clears in a couple seconds. The Guzzi has a Morse timing chain with hydraulic tensioners. Could it be a tensioner bled down that's the source of this momentary rattle?



'09 Subaru Forester ...................(QS HM 5W30)
'16 Moto Guzzi Stelvio 1200 .....(ENI i-Ride PG 10W60)
Re: Question on Hydraulic Timing Chain Tensioners [Re: LoneRanger] #4676859
02/24/18 07:59 PM
02/24/18 07:59 PM
Joined: Jun 2014
Posts: 2,117
IL
Vern_in_IL Offline
Vern_in_IL  Offline

Joined: Jun 2014
Posts: 2,117
IL
could be a bad ADBV in the oil filter.

Re: Question on Hydraulic Timing Chain Tensioners [Re: LoneRanger] #4676860
02/24/18 08:01 PM
02/24/18 08:01 PM
Joined: Mar 2013
Posts: 3,401
southern mo
ram_man Offline
ram_man  Offline

Joined: Mar 2013
Posts: 3,401
southern mo
What kind of oil filter could be a tensioner but don't overlook the filter.


2014 dodge dart GT
1995 Dodge ram 1500


Re: Question on Hydraulic Timing Chain Tensioners [Re: LoneRanger] #4676864
02/24/18 08:07 PM
02/24/18 08:07 PM
Joined: Jun 2012
Posts: 1,825
USA
oldhp Offline
oldhp  Offline

Joined: Jun 2012
Posts: 1,825
USA
I always thought the tensioner had some kind of a mechanical device to hold the slack when engine was shut off. No?


2018 RAM 1500 3.6/8 speed.
2017 Jeep Sahara Unlimited 3.6
"U kan't fixe it......if'n it ain't broke."
Re: Question on Hydraulic Timing Chain Tensioners [Re: LoneRanger] #4676910
02/24/18 08:52 PM
02/24/18 08:52 PM
Joined: Jun 2002
Posts: 12,883
The Motor City
Kestas Offline
Global Moderator
Kestas  Offline
Global Moderator

Joined: Jun 2002
Posts: 12,883
The Motor City
I know my Mercedes has a ratcheting mechanism to take up any slack.

Re: Question on Hydraulic Timing Chain Tensioners [Re: Kestas] #4677023
02/24/18 10:33 PM
02/24/18 10:33 PM
Joined: Dec 2016
Posts: 8,017
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,017
Waco, TX
Originally Posted By: Kestas
I know my Mercedes has a ratcheting mechanism to take up any slack.


So do all the Ford 4.6 and 5.4 engines.

Many engines do.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Question on Hydraulic Timing Chain Tensioners [Re: LoneRanger] #4677165
02/25/18 01:53 AM
02/25/18 01:53 AM
Joined: Dec 2005
Posts: 3,566
The Canyons
02SE Offline
02SE  Offline

Joined: Dec 2005
Posts: 3,566
The Canyons
Your bike is pretty new, and the most wear to the sprockets and timing chain occur in the first few thousand miles. The plunger has teeth along it's length (the ratchet mechanism mentioned) and as the initial wear to the chain and sprockets occurs, at some point the tensioner will be between being loose on one tooth, but not yet able to click to the next tooth. So there is that slack in the chain when the engine is first started, but before the oil pressure can press the tensioner against the camchain guide, and take up the slack.

Long story short: Eventually the chain and sprockets will wear just enough for the tensioner to click to the next tooth, and the momentary rattle before oil pressure builds, will cease. At that point the chain and sprockets will wear at a very slow rate from then on.

Sometimes the tensioners can go bad, but that's rare. So I wouldn't worry about it.

Re: Question on Hydraulic Timing Chain Tensioners [Re: 02SE] #4678316
02/26/18 01:31 AM
02/26/18 01:31 AM
Joined: Jul 2010
Posts: 20,372
PNW
ZeeOSix Offline
ZeeOSix  Offline

Joined: Jul 2010
Posts: 20,372
PNW
+1 on 02SE's comments. My Busa went through the same thing with the updated ratcheting/oil pressure feed CCT.

Re: Question on Hydraulic Timing Chain Tensioners [Re: LoneRanger] #4678418
02/26/18 07:45 AM
02/26/18 07:45 AM
Joined: Jul 2007
Posts: 4,457
Midwest USA
LoneRanger Offline OP
LoneRanger  Offline OP

Joined: Jul 2007
Posts: 4,457
Midwest USA
Thanks for the info, that makes sense.



'09 Subaru Forester ...................(QS HM 5W30)
'16 Moto Guzzi Stelvio 1200 .....(ENI i-Ride PG 10W60)
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