C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Ticking noise

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Old Feb 11, 2008 | 09:47 AM
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Default Ticking noise

Alright. Every time I post one of these it goes to further show my absolute ignorance about all of this stuff, which is why I am utterly dependent upon all of you for help.

Most motors that I have listened to sound fairly smooth when running, but my l98 always has that tick, tick, tick, tick from under the valve covers. Lifters? Anyways, is that pretty normal on these or is their an adjustment that needs to happen?

Also, refresh my memory...what fluid is it that you spray around the running engine to find vacuum leaks, starter fluid???

Thanks
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Old Feb 11, 2008 | 09:55 AM
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Could be lifters but the injectors do make a ticking noise that can throw you off and have you thinking a valve adjustment is in order, they sound similar. most of them do make noise, some more than others.
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Old Feb 11, 2008 | 11:40 AM
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To check for vacuum leaks you can use a few different things.The one I use is carb cleaner and quite a few use a propane torch. WW

Last edited by WW7; Feb 11, 2008 at 11:50 AM.
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Old Feb 11, 2008 | 11:53 AM
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I wouldnt be too worried about it unless it was a metallic ticking like not getting enough oil on the rocker arms.
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Old Feb 11, 2008 | 01:01 PM
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Carb cleaner. Thats it. I new it was something like that. The reason I need to check is because if you hit the gas from an idle there is a very brief moment in there where it seems like there is some hesitation and the sound of sucking air. Otherwise seems ok.

As far as the ticking goes--just thought that i would ask. Its not an oil knock or anything, just a definite tick, tick, tick, from the lifters inside the valve covers. Just wanted to make sure that was normal.

Thanks for the input.
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Old Feb 11, 2008 | 03:43 PM
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Injectors make the same tick sound... screwdriver to the VC and know for sure if the sound comes from there
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Old Feb 11, 2008 | 04:56 PM
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Are you saying to yank the valve covers while it is running and see whats making the noise? Can you do that? Wouldn't you get oil everywhere?
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Old Feb 11, 2008 | 05:04 PM
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The screwdriver he is referring to is to place against the valve cover and put your ear to the other end--you can listen like a doctor! You'll be able to hear very well this way.

Last edited by tgtexas02; Feb 11, 2008 at 05:08 PM. Reason: addition
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Old Feb 11, 2008 | 05:11 PM
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Oh, by the way, hope you didn't go to MU or K-State----go Jayhawks!!!!! Original Kansas City kid who now lives in Texas.
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Old Feb 11, 2008 | 11:40 PM
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If I had to lean a direction, I would say MU, but I didn't go to either. I started at Truman State in Kirksville MO and ended up going to a seminary here in KC to finish out.

So by listening through the screwdriver I should be able to tell if the ticking is coming from under the VC or not?

Thanks
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Old Feb 12, 2008 | 01:04 AM
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The answer is yes. I have even used a short broom handle to listen. Oh, Texas Longhorns beat my guys tonight so down in the dumps now. Best of Luck.
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Old Feb 12, 2008 | 10:33 AM
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If you have a vacuum leak it usually shows as a surging and/or irregular missing and will sometimes stall. WW
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