still tapping noise after timing chain replacement
#41
I'm surprised that after all this time NO ONE suggested that the rocker shafts and / or bushings in the rocker arms might be worn. Shame on all you people.
I'm not sure why everyone seems to think that a solid shaft with a rocker arm pivoting around it isn't going to wear out, particularly when one side of the rocker arms are under pressure from the camshaft and the other end is under pressure from the valve spring, both acting to "lift" the rocker arm up and grind against the shaft.
Adjusting the valves is only going to take up clearance between the rocker arm and the shaft when the feeler gauge is putting enough pressure on the rocker arm to press the 'bottom' of the rocker arm against the shaft. That works fine for valve adjustments and stuff, but nothing is going to take up the 'slack' on the top side of the rocker arm and shaft, so when the cam releases the valve, the rocker arm will float and slap against the shaft and make lots of noise.
I'm not sure why everyone seems to think that a solid shaft with a rocker arm pivoting around it isn't going to wear out, particularly when one side of the rocker arms are under pressure from the camshaft and the other end is under pressure from the valve spring, both acting to "lift" the rocker arm up and grind against the shaft. Adjusting the valves is only going to take up clearance between the rocker arm and the shaft when the feeler gauge is putting enough pressure on the rocker arm to press the 'bottom' of the rocker arm against the shaft. That works fine for valve adjustments and stuff, but nothing is going to take up the 'slack' on the top side of the rocker arm and shaft, so when the cam releases the valve, the rocker arm will float and slap against the shaft and make lots of noise.
Last edited by abecedarian; Nov 5, 2009 at 03:33 PM.
#43
I'm surprised that after all this time NO ONE suggested that the rocker shafts and / or bushings in the rocker arms might be worn. Shame on all you people.
I'm not sure why everyone seems to think that a solid shaft with a rocker arm pivoting around it isn't going to wear out, particularly when one side of the rocker arms are under pressure from the camshaft and the other end is under pressure from the valve spring, both acting to "lift" the rocker arm up and grind against the shaft.
Adjusting the valves is only going to take up clearance between the rocker arm and the shaft when the feeler gauge is putting enough pressure on the rocker arm to press the 'bottom' of the rocker arm against the shaft. That works fine for valve adjustments and stuff, but nothing is going to take up the 'slack' on the top side of the rocker arm and shaft, so when the cam releases the valve, the rocker arm will float and slap against the shaft and make lots of noise.
I'm not sure why everyone seems to think that a solid shaft with a rocker arm pivoting around it isn't going to wear out, particularly when one side of the rocker arms are under pressure from the camshaft and the other end is under pressure from the valve spring, both acting to "lift" the rocker arm up and grind against the shaft. Adjusting the valves is only going to take up clearance between the rocker arm and the shaft when the feeler gauge is putting enough pressure on the rocker arm to press the 'bottom' of the rocker arm against the shaft. That works fine for valve adjustments and stuff, but nothing is going to take up the 'slack' on the top side of the rocker arm and shaft, so when the cam releases the valve, the rocker arm will float and slap against the shaft and make lots of noise.
how will i know this could be my problem and it not be just my lifters in the wrong place or upside down..??
#44
22re / 22r's don't have lifters.
You won't know unless you check the rocker shafts and rocker arms per the instructions in the Factory Service Manual, a.k.a. FSM, of which there are several available for download and perusal (for free) if you search Yotatech for them.
However, I would bet that any 22r/22re with more than 150K miles on it does have significant wear on the rocker shafts... unless it was meticulously maintained.
You won't know unless you check the rocker shafts and rocker arms per the instructions in the Factory Service Manual, a.k.a. FSM, of which there are several available for download and perusal (for free) if you search Yotatech for them.
However, I would bet that any 22r/22re with more than 150K miles on it does have significant wear on the rocker shafts... unless it was meticulously maintained.
#46
Well, the 3VZE has cam over buckets, so no rocker shafts to wear out.
and you might want to host your signature picture online so people can see it.
and you might want to host your signature picture online so people can see it.
Last edited by abecedarian; Nov 5, 2009 at 05:20 PM.
#47
ok. so more than likely the problem is my lifters? I would put an audio clip of what it sounds like but i have no way of doing that. its just a continuous ongoing tap that ges louder when accelerating. and i fixed that just right now actually. Sorry
#48
A tapping type of noise that gets louder when you are accelerating / stepping more on the pedal, and goes away when you let off the pedal, is usually an exhaust leak.
Last edited by abecedarian; Nov 5, 2009 at 05:30 PM.
#51
I'm surprised that after all this time NO ONE suggested that the rocker shafts and / or bushings in the rocker arms might be worn. Shame on all you people.
I'm not sure why everyone seems to think that a solid shaft with a rocker arm pivoting around it isn't going to wear out, particularly when one side of the rocker arms are under pressure from the camshaft and the other end is under pressure from the valve spring, both acting to "lift" the rocker arm up and grind against the shaft.
Adjusting the valves is only going to take up clearance between the rocker arm and the shaft when the feeler gauge is putting enough pressure on the rocker arm to press the 'bottom' of the rocker arm against the shaft. That works fine for valve adjustments and stuff, but nothing is going to take up the 'slack' on the top side of the rocker arm and shaft, so when the cam releases the valve, the rocker arm will float and slap against the shaft and make lots of noise.
I'm not sure why everyone seems to think that a solid shaft with a rocker arm pivoting around it isn't going to wear out, particularly when one side of the rocker arms are under pressure from the camshaft and the other end is under pressure from the valve spring, both acting to "lift" the rocker arm up and grind against the shaft. Adjusting the valves is only going to take up clearance between the rocker arm and the shaft when the feeler gauge is putting enough pressure on the rocker arm to press the 'bottom' of the rocker arm against the shaft. That works fine for valve adjustments and stuff, but nothing is going to take up the 'slack' on the top side of the rocker arm and shaft, so when the cam releases the valve, the rocker arm will float and slap against the shaft and make lots of noise.
#52
Jeremy it doesn't sound like your problem is the same as what mine was. It's also a different engine and probably has a different set of common problems. For the sake of drawing in more of the V6 experts and also for people searching for help in the future, it might be worth starting your own thread on the subject. Good luck!
#53
Abecedarian my V6 idles quietly but when Im going thru my gears it taps or makes dieseling clicking sound.When I let off gas its quiet,does it all the time when accellerating.Cant really hear it at 60 to 80 mph though because my 31s are humming to me.Im thinking/hoping its exhaust like you suggest it might be.
#54
I thought I should give one final update here. I went through with it and replaced the rod and main bearings (they came in a kit together from engnblder.com, so why not replace the mains at the same time?). The noise is now totally gone. I can't get it to make it at all. The bearing replacement job was pretty simple. It's a little time consuming, but you could have it finished in a day pretty comfortably if you had the parts in hand.
So if you hear a noise like my sound clip posted earlier in this thread, it might be rod knock. Replacing the rod and main bearings fixed it for me.
So if you hear a noise like my sound clip posted earlier in this thread, it might be rod knock. Replacing the rod and main bearings fixed it for me.
#55
Good luck!
#57
well i did the rod bearings last night. It started puring rain so i did not attempt the mains. The number 1 bearing was missing a piece between the oil holes on the cap. The truck made tapping at startup and it randomly tapped once or twice. once its warm no noise can be heard. I drove it a short distance and thought all was good. This morn It was tapping on startup but seemed to quiet down after it warmed up. I plastigaged the bearings and they were in spec. any ideas? or do you think they just need to settle in?
#59
edit** The nosie was worse last night more frequent like a rod knock....FML. I was reallyhoping to get 6 months or so outta doing this to get enough time to rebuild my other motor.
well the guide is worn...You described your noise exactly like I would have described mine. its intermitent not all the time. what kind of noise does the timing chan make when its goin out?
well the guide is worn...You described your noise exactly like I would have described mine. its intermitent not all the time. what kind of noise does the timing chan make when its goin out?
Last edited by 1styota4X4; Nov 17, 2009 at 08:18 AM.
#60
Pitviper...I have this exact noise. Your sound clip is spot on for my noise. Mine has done it since I owned it, I thought that noise was timing chain, did the chain and noise is still there. Thanks for doing the work, I figured it was my rod bearings, but I did not want to drop the diff and oil pan again just to find out.






