What is that faint knocking sound???
Thread Starter
Joined: Mar 2006
Posts: 4,668
Likes: 5
From: Central Kentucky
What is that faint knocking sound??? I have started the process of LE head and cam install, but just before I was under the car and heard a very faint knocking or ticking noise come from the rear of the block near the bell housing and oil pan. It is not severe and may even be the roller rockers, but I cant quite tell.
It is most noticable under the car at the back of the block at idle. When it is reved it does not get any louder. Even when driving and hammering on it no knocking sound heard. Cant hear it at all at idle up top with the hood up.
I had the rod bearings go out on my Jeep, knocked very loud while driving. Definitely does NOT sound like that.
78K on the clock and good oil pressure. Is this faint knocking sound normal when you are under the car? Could it be my RR's or am I on the way to bad rod bearings? Again it is not loud or violent, not like a hammer against the block.
I had a tiny exhaust leak at the driver collector, but again tiny. The sound is more of a knock than a tick.
Thanks
It is most noticable under the car at the back of the block at idle. When it is reved it does not get any louder. Even when driving and hammering on it no knocking sound heard. Cant hear it at all at idle up top with the hood up.
I had the rod bearings go out on my Jeep, knocked very loud while driving. Definitely does NOT sound like that.
78K on the clock and good oil pressure. Is this faint knocking sound normal when you are under the car? Could it be my RR's or am I on the way to bad rod bearings? Again it is not loud or violent, not like a hammer against the block.
I had a tiny exhaust leak at the driver collector, but again tiny. The sound is more of a knock than a tick.
Thanks
Staging Lane
Joined: Oct 2002
Posts: 66
Likes: 0
From: mechanicsville va
Throw out bearing rattling. I had one that knocked like a rod bearing on time but it started out like what you are saying. have someone push the clutch in and see if it goes away while you listen
man i vave the EXACT same problem but i am A4....and its a slight knock not heavy at all only at idle coming from the same spot....it's been doing it a very long time and never got worse....i can also hear it if i'm in a drive through..post up if ya figure out the prob.
It's probably the torque converter. It's not going bad they just make some noise. I've got a new gm converter and I finished rebuilding the engine and it has the same noise.
Originally Posted by 01WS6/tamu
It's probably the torque converter. It's not going bad they just make some noise. I've got a new gm converter and I finished rebuilding the engine and it has the same noise.
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
I have it too and I think it's whats causing my ping :\ No clue what it is. I thought the ping was the O2 sensor, but no luck after changing it. Maybe I'll have to replace the other side too :\
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