Engine Tapping Noise Not Valve Clearance Related

[WIL84911]

Originally Posted by Duc Hunter

Once my injectors came on with key on....made a lot of noise like yours. That said I just finished a top-end job on my 3.2 (broken head stud). The shop set the valves and said I needed to drive it for 1,000-1,500 miles to let the heads settle, and then re-torque the heads. They said the valves could get louder until the re-torque. My valves sound like yours..but only once the oil is warm. When it is not, they are quiet.

Does it make your noise all the time, or only once the oil is warm...meaning near the first white line? Does your car make any other noises when on the road/under load? I hear a deep knock from your in car video....that sounds different to me then the valve tappet noise from the engine compartment.

Noise appear once warm but only at idle or up to maybe 1500 rpm with or without load. Past that noise is gone. Yes it does sound like knocking but what do I know. Still have to confirm but it is not coming from any valve covers.

[Duc Hunter]

Hmm...any deeper knocking I have heard was not temp dependent. The ones I have heard did not go away with RPM...their speed just increased but you could still feel them. That higher pitched valve tapping type sounds I have heard temp dependent (in my car). Strange one you have there.

[Monza_dh]

I had a knock/tick that sounded exactly like yours and recently had my wrench try to locate the source. He found my rockers and shafts were a little worn with with score marks one side.

My cams and rockers are headed out to be redone so I wont exactly know if its gone until they get back but I had my heads done around 7k miles ago and the shop reinstalled the rockers and shafts as is (they had 98k miles on them at that point.

Good luck