Lifters, piston slap, or normal?

[ls1frc]

Since my 6.2 swap, my cold starts just sound terrible. I had many cammed vehicles and never heard them be this loud on cold start.

They are Johnson 2110 lifters, which I heard can be noisy cold. They are quiet when fully warmed.

If it was piston slap I'd just live with it, but the sound drives me nuts enough that I'd replace the lifters if it guaranteed the sound would go away.

This is with exhaust manifolds too, since my Kooks are in for warranty repair.

 

[Geotrash]

That sounds like valvetrain noise to my ear. Are you 100% sure on the pushrod length measurements?

 

[ls1frc]

That sounds like valvetrain noise to my ear. Are you 100% sure on the pushrod length measurements?

Yup, 100% sure. Tried different lengths too. Truck drives awesome just tired of the noise, makes it sound like a junker. The morel drop ins on my 5.3 were quiet.

Might just go back to those.

When I listen to the video a few times, it's a more deep "in the block" sound vs something up top. Either cam or lifters then I suppose. Since it quiets down when fully warm, I'd lean towards lifters.

 

[Foggy]

Just throwing this out there for thought.. You said you put back on the stock
exhaust manifolds.. Are they the 6.2 manifolds ?? Do you "think" you could
have any type of exhaust leak ???

 

[ls1frc]

Just throwing this out there for thought.. You said you put back on the stock
exhaust manifolds.. Are they the 6.2 manifolds ?? Do you "think" you could
have any type of exhaust leak ???

I used the manifolds that came with the 6.2.

No exhaust leaks. The headers y-pipe leaked that's why I sent them in for repair.

 

[FrankU]

What type and grade oil are you using ? The 6.2 was very noisy on start up with 5-30 Mobil one and then only quieted down a bit after warming. But still was a racket. Switched over to 10-30 Amsoil and the 6.2 quieted down a bit.
But sounds like a lifter noise you have there.

 

[Dantheman1540]

I second an oil viscosity change, I've played around a bunch with different oils and found that if it's anywhere below 50* mine sounds awful upon startup with a 10-40 or thicker oil. With a 5-30 it's fine on startup but sounds slightly louder once hot.

 

[ls1frc]

What type and grade oil are you using ? The 6.2 was very noisy on start up with 5-30 Mobil one and then only quieted down a bit after warming. But still was a racket. Switched over to 10-30 Amsoil and the 6.2 quieted down a bit.
But sounds like a lifter noise you have there.

I second an oil viscosity change, I've played around a bunch with different oils and found that if it's anywhere below 50* mine sounds awful upon startup with a 10-40 or thicker oil. With a 5-30 it's fine on startup but sounds slightly louder once hot.

I have spent hundreds on different oils lol. Could have bought another set of lifters that's how much I spent.

I am running top of the line 5w-30 redline right now, it's a moly group 5 oil with tons of detergents in it and zinc. I decided it would be the last oil I try because if it's noisy with this, nothing will quiet it.

When it's time to change it, I will switch to the 0w-30 version.

Here it is fully warmed up, sounds like a normal mild cammed engine.

 

[ls1frc]

Found a thread with identical noises when cold vs warm on G8 forum. He said he fixed it by replacing oil pump??? I have 60 psi when cold.

https://www.g8board.com/threads/ls3-noise-when-engine-is-cold.285045/

 

[Dantheman1540]

I have spent hundreds on different oils lol. Could have bought another set of lifters that's how much I spent.

I am running top of the line 5w-30 redline right now, it's a moly group 5 oil with tons of detergents in it and zinc. I decided it would be the last oil I try because if it's noisy with this, nothing will quiet it.

When it's time to change it, I will switch to the 0w-30 version.

Here it is fully warmed up, sounds like a normal mild cammed engine.

I can't hear crap on my work computer so I'll listen to the video later at the gym with headphones. If different oils don't help then I doubt a different pump will since your seeing plenty of OP. When mine would be loud it only made like 10-15psi when cold and after a minute climbed to 70+. I'd think the lifters are either not happy or that's just their nature. How much lift does the cam have?