Knock
Cruising
Joined: Oct 2015
Posts: 10
Likes: 0
From: California
Oil pump bad
Low oil
Valve train such as lifter, pushrods etc.
Bad spark plug and or wire.
Its really hard to say, a video will definitely help.
I had the same issue but it turned out to be the ac belt tensioner, so I cut it off.
Hope this gives an idea where to look.
Melting Slicks
Joined: Feb 2014
Posts: 2,724
Likes: 149
From: chicago area IL.
since you said what side its on it might be an exhaust leak i've herd more then a few that sounded like a engine knock when cold and gos away when warmed up
if it had piston slap you would of herd it a lot sooner then 105k
if it had piston slap you would of herd it a lot sooner then 105k
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You don't say just how long you have had the car. It does sound like piston slap, but if you've had it a long time, you should have heard it before now. Check the things above and see if they can be ruled out. Good luck - hope it is nothing serious.
Melting Slicks
Joined: Feb 2014
Posts: 2,724
Likes: 149
From: chicago area IL.
the few LSx engine i had that had piston slap had it on both side, every one i herd you could not tell witch side it was since he said witch side it was lead me to think its a exhaust header/manifold leak my last z06 had a leak i really though i had a rod knock
i'd inspect the exhaust for leaks if that was all good i'd pull the valve covers to see how that looks? might be a stubborn lifter when cold lazy pumping up
i'd inspect the exhaust for leaks if that was all good i'd pull the valve covers to see how that looks? might be a stubborn lifter when cold lazy pumping up
