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My 2002 C5Z’s engine started making a clicking/knocking noise on the drivers side today. There is currently 114K miles on the car. Within the past 5000 miles I’ve upgraded the valve springs, upgraded the push rods, upgraded the rockers with a trunnion kit, replaced the water and oil pump, new lifters, new balancer, new roller timing set, new thrust plate, and installed a mild cam.
From what I’ve read on the forums from others having similar behavior, it could very well be a bad lifter, which would suck for a novice garage mechanic like myself.
I’ve recorded a video that includes the sound I’m hearing from it. Here it is;
any suggestions would be awesome. I’m assuming I’ll need to inspect the rockers and valve springs before anything, but really hoping I don’t need to pull the heads.
Last edited by CapslockAnt; Jun 9, 2019 at 10:35 PM.
I'd suggest getting a dowel rod about 2 feet long and putting your ear on one end, then probing for exactly where the tick is coming from before going any further...
I'd suggest getting a dowel rod about 2 feet long and putting your ear on one end, then probing for exactly where the tick is coming from before going any further...
I’ll need to go purchase a dowel rod to do this. Is there a better tool for this test since I’ll need to run to a store anyways?
I pulled the valve cover and the rockers/valve springs look healthy. Here are some pictures.
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
since you had the rockers off have you checked the torque to make sure none of them came loose?... you can also start the engine without the valve cover on and see if anything looks out of the ordinary
since you had the rockers off have you checked the torque to make sure none of them came loose?... you can also start the engine without the valve cover on and see if anything looks out of the ordinary
All of them were snug and secure, valve springs also. I didn’t start the engine but that’s definitely good to know for the future.
I now seem to hear the noise on both sides of the engine, I can’t pinpoint the sound. I purchased a mechanic stethoscope and it’s not doing much good — I have no idea where this noise is coming from.
I noticed that one of the caps from my AC condenser line is missing. Any chance it’s somehow made it’s way into the crank area and is bouncing around?
Should I be worried to drive it with this noise? I’m considering taking it for a spin to see if the noise lessens, gets worse, or goes away — but obviously don’t want to damage my car.
I now seem to hear the noise on both sides of the engine, I can’t pinpoint the sound. I purchased a mechanic stethoscope and it’s not doing much good — I have no idea where this noise is coming from.
I noticed that one of the caps from my AC condenser line is missing. Any chance it’s somehow made it’s way into the crank area and is bouncing around?
Should I be worried to drive it with this noise? I’m considering taking it for a spin to see if the noise lessens, gets worse, or goes away — but obviously don’t want to damage my car.
Def not crank no, belt drive or something maybe, but seems highly unlikely. Hows it sound if you blip the throttle? Sounds internal and lower end to me, but hard to diagnose on video.
Could pull the belt and fire it up to see if it goes away, wont take long to rule out belt drive.
Check torque on rockers like mentioned too, and underside of valve covers nothing hitting.
LS6 knocking / clicking noise
