Wrist pins
Sep 6, 2017, 04:28 PM
#1
Newbie
Thread Starter
Wrist pins
So evidently the ticking from my evo is highly suspected to be the wrist pins. Changed out the filter and cut my old one, no metal flakes etc so I do not think it is a rod. My question is should I theoretically change out the rods as well or can I just replace the wrist pins? If I am going in, I figure I might as well do everything that needs to be done. I don't want any more than 500 WHP. I was originally thinking 400 WHP but now I may go with stronger internals.
Sep 6, 2017, 05:41 PM
#2
I don't think I would tear into it at all unless you are 100% certain what the noise is and whether its harmful or not.
Have you put a recorder in the engine bay or even better lower in the block to see if its more pronounced? If you hear it in the cabin then it should be 10x louder under the hood. Do you year in when not in gear simply reving the car via TB? I would diagnose more.
Have you put a recorder in the engine bay or even better lower in the block to see if its more pronounced? If you hear it in the cabin then it should be 10x louder under the hood. Do you year in when not in gear simply reving the car via TB? I would diagnose more.
Sep 6, 2017, 06:22 PM
#3
Newbie
Thread Starter
So the ticking is only once the car is warm and under load at about 2500 rpms (that is when I can hear it in the cab). Runs fine, no lights, no hesitation. It is not a built motor. still has balance shafts.
Last edited by Jhaze71; Sep 6, 2017 at 06:34 PM.
Sep 6, 2017, 07:44 PM
#5
EvoM Guru
iTrader: (1)
More likely a piston broke a skirt.
Sep 7, 2017, 06:23 AM
#7
Newbie
Thread Starter
I sent the video of the noise to a guy who is supposedly an evo guru and that was his assessment. Wrist pin or rod. The ticking noise is not there when the car is cold, it is only after it warms up then is most noted under load at lower rpms. I can not hear it as well at higher rpms but I suspect it is due to the exhaust being more audible then.
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japspec (Jan 18, 2021)
Sep 7, 2017, 03:29 PM
#10
Evolved Member
It could be a wrist pin but more likely a rod. If you want to pursue this I suggest the next step is examining the rod bearings. You might just catch one before it trashes the engine. This would also provide the opportunity to feel for wrist pin play.
Sep 7, 2017, 09:10 PM
#11
Listening to the video .... sure sounds higher up in the motor.... I think before I dropped the pan I would pull the valve cover and inspect things. Significantly less work and just as valuable.
Sometimes the best way to capture the sound is to record it from another vehicle that is driving side by side as engine noise is subdued in your cabin but not from the surroundings.
Sometimes the best way to capture the sound is to record it from another vehicle that is driving side by side as engine noise is subdued in your cabin but not from the surroundings.
Sep 9, 2017, 11:23 AM
#14
Newbie
Thread Starter
oddly the noise is even more prevalent in the cabin and is new, I may replace the lifters and see if it goes away. Anything I do at this juncture is going to be a bit of an expense. I am on stock cams, only a few bolt ons.
Sep 12, 2017, 06:38 PM
#15
That is definitely in the valvetrain. Like I said above pull the valve cover off and look for anything out of place. I once mis-shifted resulting in a 2-3-2 shift that was intended to be 2-3-4. That resulted in some out of place rockers. No other damage ... just had to reassemble them.