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Old 10-31-2017, 02:13 PM   #1
Snowwolf
 
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Ticking/tappet noise from engine

I have the LSA 6.2 I also have the Walkinshaw stage 2 kit fitted, I have recently noticed a ticking tappet sound from the engine at about 1500 rpm any suggestions as to what it can be
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Old 10-31-2017, 02:38 PM   #2
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Have a mechanic go in there with a stethoscope to locate and replace whatever is worn or damaged.
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Old 10-31-2017, 04:02 PM   #3
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Does the ticking speed up when revved ? If so it could be a lifter or rocker arm something in the valve train. Check oil / oil filter for metal shavings or send in for analysis.
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Old 10-31-2017, 05:35 PM   #4
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Possibly the Isolator?
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Old 10-31-2017, 06:00 PM   #5
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I think the isolator May have been changed when the stage 2 kit was fitted but unsure, the tapping noise is only there at about 1500 rpm it’s not noticeable either side of that rpm
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Old 10-31-2017, 06:13 PM   #6
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Regarding the isolator, what is the latest design? No spring or with spring?
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Old 10-31-2017, 07:22 PM   #7
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Quote:
Originally Posted by Snowwolf View Post
I have the LSA 6.2 I also have the Walkinshaw stage 2 kit fitted, I have recently noticed a ticking tappet sound from the engine at about 1500 rpm any suggestions as to what it can be
Did it just start? The LSA can be a little ticky at idle and up to 1500rpm.
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Old 10-31-2017, 10:50 PM   #8
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The SC isolator sounds more like a rattle, not a consistent tick. Maybe a header gasket leak. Maybe a bad lifter, rocker arm, or cam lobe going out early.
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Old 11-01-2017, 07:39 AM   #9
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Assuming you have headers, check your header bolts, especially the collector bolts for leaks that could possibly be creating resonance.

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Old 11-01-2017, 08:44 AM   #10
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Could be pulleys or the supercharger. Believe it or not the LSA has the quietest valvetrain of all of my LS cars!
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Old 11-01-2017, 11:35 AM   #11
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Isn’t some ticking from an LS motor fairly normal? Valvetrain noises?
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Old 11-01-2017, 01:45 PM   #12
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It sounds like it is coming from the top of the engine, it does have an upgraded cam and has always been a bit tappety since it was fitted, but this single tap noise sticks out from the rest, you can hear it easier if you have window open and moving along a road that has a wall to one side, definitely can hear it, but only seems to be there at 1500 rpm perhaps I should buy a stethoscope?
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Old 11-01-2017, 05:09 PM   #13
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Quote:
Originally Posted by Snowwolf View Post
It sounds like it is coming from the top of the engine, it does have an upgraded cam and has always been a bit tappety since it was fitted, but this single tap noise sticks out from the rest, you can hear it easier if you have window open and moving along a road that has a wall to one side, definitely can hear it, but only seems to be there at 1500 rpm perhaps I should buy a stethoscope?
You should have one there cheap.
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Old 11-01-2017, 05:10 PM   #14
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Quote:
Originally Posted by lbls1 View Post
Could be pulleys or the supercharger. Believe it or not the LSA has the quietest valvetrain of all of my LS cars!
Yeah I know, and it's still ticky..
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