Is this piston slap or normal lifter noise (Solved)

Hello, I got a 2015 tacoma with the 1gr-FE dual vvti, I was doing valve lifters(solid) since the clearance was out of specification, changed all the lifters to the corresponding ones and it all measured within the range.

Put it all back together and now I have this loud noise on the passenger side; I read these engines are loud compared to others but I'm not sure if i should be worried or not, I saw the videos of other people with a similar sound some saying its piston slap and some saying that its normal so what do you guys think.

I used a stethoscope to check and the noise is louder where the vvt camshaft gear is maybe a bit louder on the secondary chain there's also some noise from lifters 5 and 6 but its pretty faint so its probably the sound traveling from the front to the back.


EDIT: so it seems piston 1 on the passenger side broke and it scuffed the cylinder walls that was the terrible sound it had, so im gonna need rings, probably replace all the pistons since these seem bad quality and a sleeve.


https://youtube.com/shorts/vJ1yL9264EE

 

Improper shim. They are not quiet valve trains but one has too much clearance.

 

by shims you mean the lifters? they came in 35 sizes; I thought the same too its sound is on the camshaft vvt gear; whats close to that are lifters 1-2 on the intake side and 1-2 on exhaust although they seem to been withing specs which is 0.15mm to 0.25mm for intake and 0.29mm to 0.39mm for exhaust.

 

Yes in that case it is a shim as they are different sizes.

 

How many miles on your 2015.
My 15 has serious piston slap from day one and it sounds nothing like that

 

86660 KMS (53848 miles) now this engine was rebuilt since the original person i bought it trashed it; It was sludge to hell it bent the cranshaft and 3 piston rods so the whole engine was overhauled and it was pretty nice until i did 800 kms when a similar noise started that why I changed the lifters.

 

I see; what makes you think its the shim? Its possible since it measures within spec but maybe it needs to be more tight with a different size; I did search some post here and people posted a noise similar to mine and people said that its normal but I'm not sure I believe that.

 

A common mistake I’ve seen guys make is to not have the crank positioned properly or doing the wrong one within the group to be done together. I’d pull the covers & double check. I’m not saying you don’t know what you’re doing so don’t take it wrong.

 

interesting what makes you think the cranshaft is in the wrong position, do you mean when it was first rebuilt or do you mean when checking the valve clearance.

 

Checking.

 

Ohhh, no I do it completely different than the factory manual says since that procedure takes more time; I set the crankshaft to 0 degrees TDC then I remove the chain tensioner on the passenger side, I unbolt the camshaft and slowly & carefully wiggle the chain out letting the camshaft free, I tie the chain so It don't come loose from the crankshaft then I torque back in the camshaft and I can move them myself to the position they need to be to check clearance.

This saves a lot of time as I don't have to remove most of the front and the timing cover to change the lifters I also set the timing through the top.

 

I would check the clearances again, following the FSM, unhooking the cam chain and turning the camshafts without moving the engine from TDC could possibly (most likely) cause bent valves. Bent valves will cause loss of compression and excessive valve clearance. Check compression and follow up with a leak down test to determine where compression is going, if compression is not within spec.

 

Piston slap is usually only present on a cold engine, that is def a loose clearance on one cam lobe. You're going to need to re-check the clearances.

 

https://www.tacomaworld.com/threads/1gr-fe-valves-interfering-with-piston-when-timechain-is-off.776748/

Interference vs non interference. There’s lots of reading, then you can form your own opinion. There’s apparently no definitive yes or no answer, ya gotta read who posted what, then form your own opinion based on the who’s credibility.

 

@Waasheem so new development, piston one on the passenger is broken and it scuffed the cylinder walls, so gonna new pistons, rings and a sleeve for the cylinder.