1FZFE Sound After Rebuild

[Kylackey]

Hey MUD,

Long story short. Truck has been gone through tip to tail. Full rebuild, All toyota parts ect ect.. Truck has about 10k on the rebuild, and to my knowledge I have footage of it running on first start up but I can't tell if it has always made the sound.

Can you guys let me know if this sound at idle is normal? I dont have anyone local to me or anybody with another 1FZ to even compare this sound to. Sounds like a hollow tin "ish" kinda clatter in the bottom end. Does not transfer to the top end, front cover, steel oil pan, trans, exhaust, pulleys, nothing. Strictly right in the middle of the upper oil pan.

I've isolated it to the upper oil pan, front of the motor and the video attached showcases the sound pretty perfect and the exact location. It's pretty pronounced. If anybody could just let me know that I'm not going crazy or if this is something abnormal?

Edit: Not sure if I'm freaking myself out if it's rod knock. If someone has more input/experience.


Thanks - Kyle.

 

[Kylackey]

I'll update this as I go along. It's late, in the morning I'm going to double check that it's not a belt/pulley issue.

 

[robnicko]

I'll update this as I go along. It's late, in the morning I'm going to double check that it's not a belt/pulley issue.

either remove the belts temporarily or hose them down with water to eliminate any noise they and or pulleys make

 

[Kylackey]

So I looked back at my records. Ive put 14,800 miles on it since being rebuilt. I'm hoping some 1FZ nuts can help me here...

The shop that rebuilt filled it with break in oil prior, and had primed the oil pump.

No belts and it sounds the exact same. Anyone have any guesses? I haven't done an oil sample in about 3 years and that was when I was still running conventional oil. Here's that sample, but that was when the truck had 5k miles. I've missed about 10k miles of samples after that one.

 

[Kylackey]

Just figured I'd bump this again. Anyone think this sound abnormal?

 

[60 toy ota]

I have 2 1fzs and my brother in law has another. 2 out of these 3 have been rebuilt and the other is original. I can't say I recognize this sound, but if it's only audible when you're close to it I may have missed it-I doubt that though. While it's definitely not rid knock I think you're right to be bothered by it. Can you "feel" the sound when you touch the oil pan? Does the sound intensity change when load, rpm, etc?

 

[ceylonfj40nut]

I would check oil pump splines/ bushing and power steering pump cog. Also tolerance on oil pump rotor. Was the harmonic balancer torqued to spec?

 

[Kylackey]

I have 2 1fzs and my brother in law has another. 2 out of these 3 have been rebuilt and the other is original. I can't say I recognize this sound, but if it's only audible when you're close to it I may have missed it-I doubt that though. While it's definitely not rid knock I think you're right to be bothered by it. Can you "feel" the sound when you touch the oil pan? Does the sound intensity change when load, rpm, etc?

The sound doesn't change with load or intensity but with a stethoscope I can clearly hear and feel the hollow "tapping" sound right on either the #3 or #4 cylinder. It's only on the aluminum upper oil pan. It doesn't transfer to the top/side/rear of the motor. It's completely silent on the front of the pan and the rear of the pan. I've watched some videos on YouTube and this one I think faintly sounds similar? Before this one blew a headgasket I don't believe it was this loud either?

I would check oil pump splines/ bushing and power steering pump cog. Also tolerance on oil pump rotor. Was the harmonic balancer torqued to spec?

The PS pump is new and at least with a stethoscope I have poked around it's dead quiet on the oil pump and cooler. The shop torqued the harmonic balancer for the rebuild and primed the oil system. I'd have to check that myself. Just odd I've put almost 15k miles on it and it seems like this sound is recent..

 

[BenjaminCA]

I just recently started a rebuilt 1FZ, from a 94. I don’t know the shop that build it, but I’m seeing some issues in quality… I am running the “break in” oil right now, but I can shoot a quick video next to the plan if you’d like?

 

[efjayatee]

Just figured I'd bump this again. Anyone think this sound abnormal?

Not normal. Mine sounds like a sawing machine without the extra " sounds" behind the ticking.

 

[Kylackey]

Not normal. Mine sounds like a sawing machine without the extra " sounds" behind the ticking.

That's what I'm afraid of. Truck was silent for the first couple thousand miles. Now not so much. I am paranoid with all the bad luck I've been dealt with it, but was just checking for other input since my only experience before this thing blew the OG headgasket I only put like 10k miles on it....

 

[FMC80]

I went through a series of very similar questions, it’s almost uncanny.

Here is mine after a new short block and top end rebuild and about 10k miles on the new engine.

1FZ-FE Cold start

Hope it helps you, and I hope mine isn’t about to explode.

 

[LXDOC]

Have you sent off another sample to Blackstone Labs?

 

[efjayatee]

I went through a series of very similar questions, it’s almost uncanny.

Here is mine after a new short block and top end rebuild and about 10k miles on the new engine.

1FZ-FE Cold start

Hope it helps you, and I hope mine isn’t about to explode.

That's how it's supposed to sound!

 

[Kernal]

@Kylackey : What oil viscosity are you running, the sample from 2023 looks too low for this engine (? ~20 weight). IME low viscosity engine oil can show elevated wear metals in this engine (mine at least).

It won't fix anything that's broke but it should provide more protection if you bump the oil viscosity up ie: to at least 10W-30 or 10W-40 or even 15W-40 if that's not too high for your local temps going into winter. Should also change how the engine sounds.

 

[Kylackey]

Have you sent off another sample to Blackstone Labs?

I will. It's just weird, this sound isn't constant 24/7. It's intermittent, some times it's silent. Cold starts it's quiet, almost seems like it'll start making the noise once it warms up a bit. I'm gonna get some more mileage since I just recently changed it.

@Kylackey : What oil viscosity are you running, the sample from 2023 looks too low for this engine (? ~20 weight). IME low viscosity engine oil can show elevated wear metals in this engine (mine at least).

It won't fix anything that's broke but it should provide more protection if you bump the oil viscosity up ie: to at least 10W-30 or 10W-40 or even 15W-40 if that's not too high for your local temps going into winter. Should also change how the engine sounds.

It's only ever had 10w30 since draining the break in oil. Two rounds of conventional, with full synthetic after. Southern California. I'm gonna keep driving it for a bit and see if I can check in on it. I rarely have had time these past years to even drive it much..

 

[dallen341]

IMO not a normal sound.

I would drop lower pan and check for debris (metal)