clicking noise
Thread Starter
Burning Brakes
Joined: Nov 2000
Posts: 810
Likes: 4
From: Austria
clicking noise
ok...my old question..
I´ve got a ticking noise from the passenger side underneath the car, only audible on the passenger side..its a clicking or ticking sound...not a knocking..
so let me tell you what was done until to now..
i replaced rod bearings, inspected main bearings and wrist pins( fine!!), changed timing chain, adjusted valve lash..and it still ticks..
i don´t think that the injectors cause this noise, yes, they click too, but i think that is not audible underneath the car-or??
Please help before i get crazy... :confused:
I´ve got a ticking noise from the passenger side underneath the car, only audible on the passenger side..its a clicking or ticking sound...not a knocking..
so let me tell you what was done until to now..
i replaced rod bearings, inspected main bearings and wrist pins( fine!!), changed timing chain, adjusted valve lash..and it still ticks..
i don´t think that the injectors cause this noise, yes, they click too, but i think that is not audible underneath the car-or??
Please help before i get crazy... :confused:
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: clicking noise (corvette90)
Could be an exhaust leak.
If not, these engines are noisy.. the LT1 is even more noisy than the L98 (especially the LT1 injectors) ... so it could just be engine noise..
If not, these engines are noisy.. the LT1 is even more noisy than the L98 (especially the LT1 injectors) ... so it could just be engine noise..
Thread Starter
Burning Brakes
Joined: Nov 2000
Posts: 810
Likes: 4
From: Austria
Re: clicking noise (Glock'94)
Hi Glock`94
yesterday i started the car and get under it to listen...
no noises from oil pan, no rattling catalysts ( i checked with a stethoscope, a wooden dowel, aso..) ...the noise comes definitely from the upper area, i would say injectors..
in fact, i think i have a few very loud injectors at the passengers side....
so, thanks for your help...
yesterday i started the car and get under it to listen...
no noises from oil pan, no rattling catalysts ( i checked with a stethoscope, a wooden dowel, aso..) ...the noise comes definitely from the upper area, i would say injectors..
in fact, i think i have a few very loud injectors at the passengers side....
so, thanks for your help...
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: clicking noise (corvette90)
No problem... If it was an exhaust leak, I would guess it would be from the header.. which you could tell it was coming from there.
The one other thing it could be is a lifter... which is pretty much right below where the injectors are (though the sound would sound a little closer to the middle of the engine). A lifter will get louder as the engine RPM's go up... injector noise won't ...
Hope this helps!
[Modified by Glock'94, 2:33 AM 10/20/2001]
The one other thing it could be is a lifter... which is pretty much right below where the injectors are (though the sound would sound a little closer to the middle of the engine). A lifter will get louder as the engine RPM's go up... injector noise won't ...
Hope this helps!
[Modified by Glock'94, 2:33 AM 10/20/2001]
Thread Starter
Burning Brakes
Joined: Nov 2000
Posts: 810
Likes: 4
From: Austria
Re: clicking noise (Glock'94)
Hi!!
What do you mean with lifters?
Do you mean too much lash in valve train, or a stuck hydra-lifter?
i adjusted valve lash a month ago...
noise doesn´t increase with rpm, its constant...
Thanks again...
What do you mean with lifters?
Do you mean too much lash in valve train, or a stuck hydra-lifter?
i adjusted valve lash a month ago...
noise doesn´t increase with rpm, its constant...
Thanks again...
Racer
Joined: Aug 2001
Posts: 304
Likes: 0
From: Spartanburg s.c.
Re: clicking noise (corvette90)
Got the same problem on drivers side>>Put in oil stabilizer and 4 quarts of 10-30 and it went away only to be heard every once and a while. After 1200 miles, drained the oil and went back with 5-30 and it's really loud now, all the time.Thinking it might be a collasped lifter or more probably a varnished one.1996 with 90,000 miles
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Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: clicking noise (corvette90)
Hi!!
What do you mean with lifters?
Do you mean too much lash in valve train, or a stuck hydra-lifter?
i adjusted valve lash a month ago...
noise doesn´t increase with rpm, its constant...
Thanks again...
What do you mean with lifters?
Do you mean too much lash in valve train, or a stuck hydra-lifter?
i adjusted valve lash a month ago...
noise doesn´t increase with rpm, its constant...
Thanks again...
[Modified by Glock'94, 10:30 AM 10/20/2001]
Thread Starter
Burning Brakes
Joined: Nov 2000
Posts: 810
Likes: 4
From: Austria
Re: clicking noise (Glock'94)
Many thanks to all..
In the case, it is a lifter, where does the noise then come from??
When i listen to the center of the engine with a bar no noises where noticeable
..
But when i listen to the plenum, i could hear the ticking of the injectors..
so, the lifters and the pushrods are located in the middle of the engine...if there are one ( or more ) bad, i think the noise should come from the center of the engine..
But as i said...all quiet there...
Thanks again..
In the case, it is a lifter, where does the noise then come from??
When i listen to the center of the engine with a bar no noises where noticeable
..
But when i listen to the plenum, i could hear the ticking of the injectors..
so, the lifters and the pushrods are located in the middle of the engine...if there are one ( or more ) bad, i think the noise should come from the center of the engine..
But as i said...all quiet there...
Thanks again..
Burning Brakes
Joined: Dec 1999
Posts: 765
Likes: 11
Cruise-In I Veteran
Re: clicking noise (corvette90)
This may be a long shot, but my car ticked like that when I first got it. Once under the car, I noticed that the pressure fuel line was not secured to the frame with the insulated adel clamps and was knocking against the frame. The clamps were there, but I could see the line moving around. The L98 is batch fired, so the fuel pressure drops at once and then pressurizes the line quickly, thus pulsating the line. Like I said it is a long shot, but it may be worth looking to see if all your lines are secured. Good luck.
