WTH is this engine related noise.

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xcmountain80

New member
Ok T4R it has always been my thinking that with Toyota's if you weren't sure what the noise was just wait a bit and it would get louder. It has been about a year and it progressively getting louder. I first noticed it faintly after the motor swap at 3-4k when you let off but kept throttle pressure on. As time went on the noise happened at lower RPM's, after a recent trip 1500 miles it was noisy as hell coasting down the mountains and backsides of hills, but would be suppressed by throttle input. This motor was an ebay purchase through JIS Engineering out of Texas. It currently has 31,000 miles and is 10,000 outside of their warranty :(, in the event its a main bearing well that just sucks. I have a short video with sound of the truck idling that is taking for ever to upload to photobucket.....

I've used a long screwdriver as a stethoscope to pinpoint the noise and sadly its within the engine block I believe.

I thought perhaps something exhaust related, but the heat shields aren't metal and they could not possibly contact the pipe on such a regular cycle as to cause this type of noise. It has a bearing sound to it (swirling a ball bearing in a tin can with a slight bump in the motion).

Now I shouldnt drive this any further until the problem can be identified and addressed, but I had to get my daughter from school. Now there is an intermitent oil light flashing going with the knock,,,,, at a loss WTF?

Videos for your listening displeasure (same 3 videos just a different format for those on tapatalk)





<a href="http://s36.photobucket.com/user/xcmountain/media/4Runner/Carnage/1405363748_zpsdfb6ba7e.mp4.html" target="_blank"><img src="http://i36.photobucket.com/albums/e31/xcmountain/4Runner/Carnage/th_1405363748_zpsdfb6ba7e.mp4" border="0" alt=" video 1405363748_zpsdfb6ba7e.mp4" style="width: 160px";></a>
<a href="http://s36.photobucket.com/user/xcmountain/media/4Runner/Carnage/1405364952_zpsf989bef6.mp4.html" target="_blank"><img src="http://i36.photobucket.com/albums/e31/xcmountain/4Runner/Carnage/th_1405364952_zpsf989bef6.mp4" border="0" alt=" video 1405364952_zpsf989bef6.mp4" style="width: 160px";></a>
<a href="http://s36.photobucket.com/user/xcmountain/media/4Runner/Carnage/1405365030_zps2095650f.mp4.html" target="_blank"><img src="http://i36.photobucket.com/albums/e31/xcmountain/4Runner/Carnage/th_1405365030_zps2095650f.mp4" border="0" alt=" video 1405365030_zps2095650f.mp4" style="width: 160px";></a>
 
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Sounds like a rod bearing or possible wrist pin. And the oil light means you don't have oil pressure. its basically a sensor that says "yes oil pressure" or "no oil pressure". Light on at any time means you have no oil pressure.

I really hate the fact that car companies put idiot lights in these things. By the time the light comes on, you've already done damage to the motor. And most people think its some sort of "add oil" light, so they keep driving until the motor explodes into 20 pieces
 
Some beach, well that was my worst case thought. Now determine whats the better alternative, option #1 swap a motor off ebay or option #2 FIX this one. I'm capable of the swap, but not necessarily well equpit to pull the crank shaft, top end. Come to think of it how the hell would you approach option #2. I hate putting more money into this truck, but it looks badass and I love it and have been in love with it for 9 years and 280k.....

Thank You

Aaron
 
In reply to no oil pressure, would it be a bad oil pump, according the the engine builder site this was replaced with new. My valve cover are clean, as I was just in there last month or was it the one before.

Aaron
 
xcmountain80 said:
Some beach, well that was my worst case thought. Now determine whats the better alternative, option #1 swap a motor off ebay or option #2 FIX this one. I'm capable of the swap, but not necessarily well equpit to pull the crank shaft, top end. Come to think of it how the hell would you approach option #2. I hate putting more money into this truck, but it looks badass and I love it and have been in love with it for 9 years and 280k.....

Thank You

Aaron
Click to expand...

Don't take my word as gospel, I'm just hearing a noise on a video. I would take it to a shop and have them diagnose the issue for 100% certain. Sounds like the engine you bought was starved of oil at oil point, likely when if it was rolled. 30k is basically a brand new engine, I find it hard to believe it failed so quickly unless it was in a rollover or they lied about the miles. And if its a Japanese crate engine, they lied about the miles. Seen that happen many many times.
 
Live and learn, not a soul nearby at the time building quality replacements when I did this about a year or so ago. I wasn't taking your word as gospel but this type of noise I figured what it could be.....is going to be pricey one way or the other.
 
Now since this afternoon I've google searching like a maniac, and came across something I'd much rather hope the problem is. Cracked flex plate also can sound like what I'm hearing, not to mention nearly 345k miles on this tranny and it still shifts smooth. I'll know more tomorrow.

Thanks
 
I cracked my flex plate, didn't sound like that. That is a knock, mine was a ticking noise, more like a loud ticking lifter.
 
That is a pretty solid rhythmic thunk. Now that I can hear it better on a computer with much better sound, I am more inclined to believe cracked flex plate as well. Usually a rod knock sounds much more high pitched, and will change tone and beat. That sounds like something rotating around in a constant circle.

May have missed it but have you been able to pinpoint if its front or rear of the motor?
 
Don't 5vzfe has a ticking noise almost like a knock noise but it's normal ? Mine always has a ticking noise but it's solid jdm motor. I forget the proper term for the ticking
 
DeathCougar said:
That is a pretty solid rhythmic thunk. Now that I can hear it better on a computer with much better sound, I am more inclined to believe cracked flex plate as well. Usually a rod knock sounds much more high pitched, and will change tone and beat. That sounds like something rotating around in a constant circle.



May have missed it but have you been able to pinpoint if its front or rear of the motor?
Click to expand...


With no certainty have I been able to say front or rear. It has a consistent point of contact rotationally. That has always been present, I'll get the inspection plate off and see what I can see tomorrow. The oil lightly just because it's low or totally unrelated, dipstick revealed the tip was covered which puts me at 2 qts. Low IIRC.
 
xcmountain80 said:
With no certainty have I been able to say front or rear. It has a consistent point of contact rotationally. That has always been present, I'll get the inspection plate off and see what I can see tomorrow. The oil lightly just because it's low or totally unrelated, dipstick revealed the tip was covered which puts me at 2 qts. Low IIRC.
Click to expand...

I actually wasn't able to see my cracked plate through the inspection plate. It was cracked around the bolt, which isn't visible.
 
GSPRunner said:
I actually wasn't able to see my cracked plate through the inspection plate. It was cracked around the bolt, which isn't visible.
Click to expand...

I'll second this, the one I worked on with a busted flexplate was broken around the bolt holes and not visible through the inspection hole either
 
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