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#4526577 - 09/26/17 10:16 AM Could HDEO be the cause of Valve out of spec?
Brandonysz Offline


Registered: 11/11/16
Posts: 10
Loc: Singapore
Hey guys, I just noticed that my valves tick halfway while riding. Could it be that changing to HDEO from 4T be the cause of it? Like the detergents washing away the dirt/sludge on the engine internals and causing a change in valve height etc?

Didn't really notice whether the tick was gradually getting louder because I usually ride with music, and only happened to notice it today.

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#4526671 - 09/26/17 11:48 AM Re: Could HDEO be the cause of Valve out of spec? [Re: Brandonysz]
Chris142 Online   content


Registered: 06/05/03
Posts: 16820
Loc: Deplorable in apple valley, ca
no
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#4526834 - 09/26/17 03:22 PM Re: Could HDEO be the cause of Valve out of spec? [Re: Brandonysz]
46Harry Offline


Registered: 01/08/12
Posts: 409
Loc: hawthorne, Ca.
Valve height doesn't change unless there is valve seat recession or a valve job is performed at which time the machinist doing the work should check for installed height. A hydraulic lifter could get a piece of dirt in it causing it to collapse or something is starting to fail internally which will cause a tick, the HDEO didn't cause the problem.

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#4526885 - 09/26/17 04:52 PM Re: Could HDEO be the cause of Valve out of spec? [Re: Brandonysz]
LoneRanger Offline


Registered: 07/02/07
Posts: 4058
Loc: Midwest USA
Originally Posted By: Brandonysz
Hey guys, I just noticed that my valves tick halfway while riding. Could it be that changing to HDEO from 4T be the cause of it? Like the detergents washing away the dirt/sludge on the engine internals and causing a change in valve height etc?

Didn't really notice whether the tick was gradually getting louder because I usually ride with music, and only happened to notice it today.


What brand of bike? If a Moto Guzzi, just spend the ten minutes per cylinder and adjust the valve lash back to spec. Easy peasy !!
_________________________

'09 Subaru Forester ...................(QSED DEXOS1 5W30)
'16 Moto Guzzi Stelvio 1200 .....(ENI i-Ride PG 10W60)

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#4526991 - 09/26/17 06:45 PM Re: Could HDEO be the cause of Valve out of spec? [Re: Brandonysz]
Robenstein Offline


Registered: 12/23/09
Posts: 5653
Loc: Central IA
Valves tend to get tighter not looser on modern engines with modern oils. When I had my Triumph checked that was the case as the valves had hammered a bit into the seat from taking it to 7k RPM from time to time.

Now as some mentioned if it is looser the things that cause that is a hydraulic lifter needing adjusted or you wear. Heck my bike was louder after being properly adjusted. Kind of annoying but better a little sloppy than too tight.
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#4527134 - 09/26/17 09:20 PM Re: Could HDEO be the cause of Valve out of spec? [Re: Brandonysz]
Brandonysz Offline


Registered: 11/11/16
Posts: 10
Loc: Singapore
Thanks for the replies, that means I can continue using it hahaha! Gonna go get it checked by my mech today and see if it valve adjustments.

@Loneranger & Robenstein: Not a triumph, CBR150R DOHC 4 Valve hahaha

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