[Yves ZL1]

Originally Posted by Z OH 6

Very presumptuous. The data thus far doesn't support your theory.

The same as your theory..

[Vigilante375]

Originally Posted by Yves ZL1

The same as your theory..

Katech, the ones who make a way better oil pump than GM ever will, has said that they have tested every updated oil pump for the LT4 and they all fail. In some sort of way.

So that means GM knows that their oil pumps for the LT4 are garbage but instead of fixing the issue once they put a bandaid on it.

[Z OH 6]

Originally Posted by Yves ZL1

The same as your theory..

I use data to back up mine. Where are the 2019+ coming out with high numbers of failures? Where are they?

[SJFGTO]

I believe the same oil pump has been/is used in other GM cars and trucks, so the overall failure rate is likely much smaller than the context presented in this forum. If that is the case, I wonder if it is the use of this pump on the ZL1s and how they are driven which contributes to the failures we see here. Just pure speculation on my part.

[Yves ZL1]

Originally Posted by Vigilante375

Katech, the ones who make a way better oil pump than GM ever will, has said that they have tested every updated oil pump for the LT4 and they all fail. In some sort of way.

So that means GM knows that their oil pumps for the LT4 are garbage but instead of fixing the issue once they put a bandaid on it.

Not Good News for us…

[Yves ZL1]

Originally Posted by Z OH 6

I use data to back up mine. Where are the 2019+ coming out with high numbers of failures? Where are they?

There were some on 2019… take à look at the concerned post …

And read what said just above…

[Z OH 6]

Originally Posted by Yves ZL1

There were some on 2019… take à look at the concerned post …

And read what said just above…

Wow, 1, 2, 3 maybe? Compare that to the hundreds of 2017s and 2018s. Are you really this ignorant?

What was said above is irrelevant because those are different engines if they're using the same pump. Part.of the pump failure issue is the guide tensioner. That would be different on a non-LT4 engine.

[Camaro1973]

Originally Posted by Z OH 6

Wow, 1, 2, 3 maybe? Compare that to the hundreds of 2017s and 2018s. Are you really this ignorant?

What was said above is irrelevant because those are different engines if they're using the same pump. Part.of the pump failure issue is the guide tensioner. That would be different on a non-LT4 engine.

One if the main issues with the pumps failing is with the stock tensioner. You can read about it on LME’s site as they designed one as well.

It’s going in my new engine as well.

The truck pumps have been used for quite awhile as replacements and I’m not aware of any failure on those.

[Yves ZL1]

Originally Posted by Z OH 6

Wow, 1, 2, 3 maybe? Compare that to the hundreds of 2017s and 2018s. Are you really this ignorant?

What was said above is irrelevant because those are different engines if they're using the same pump. Part.of the pump failure issue is the guide tensioner. That would be different on a non-LT4 engine.

Don’t you have other post to decay ?

You know what the ignorant says to you ? So start to respect others with humility…you know where the issue is …

[radz28]

Originally Posted by Camaro1973

One if the main issues with the pumps failing is with the stock tensioner. You can read about it on LME’s site as they designed one as well.

It’s going in my new engine as well.

The truck pumps have been used for quite awhile as replacements and I’m not aware of any failure on those.

Are you talking about the belt tensioner or the chain tensioner? I read the descriptions, but didn't really understand the way you were describing it.

[Mark R]

Originally Posted by Z OH 6

Wow, 1, 2, 3 maybe? Compare that to the hundreds of 2017s and 2018s. Are you really this ignorant?

What was said above is irrelevant because those are different engines if they're using the same pump. Part.of the pump failure issue is the guide tensioner. That would be different on a non-LT4 engine.

I'm going to jump in here for a moment, and ask about this cam chain guide tensioner. I believe you are the only one on this forum who promulgates the theory that oil pump failures are caused by the cam chain guide tensioner failing somehow.

I have been on this forum for 4 years, and I have never heard of this problem from people who have had actual oil pump failures. I'm pretty sure I have read the entire oil pump thread. Can you point to a post on the forum about such a failure?

The oil pump failures on the thread all seem to be cracking failures of the outer ring inside the oil pump. The vanes from the pump rotor eventually snag on the crack, and the inside of the oil pump gets torn up.

I looked at the LME video about their tensioner replacement, and it seems like a normal upgrade for a racing engine, but absent even one post about this on this forum, I'm a little perplexed about this aspect of oil pump failures.

[Camaro1973]

Originally Posted by radz28

Are you talking about the belt tensioner or the chain tensioner? I read the descriptions, but didn't really understand the way you were describing it.

Timing chain tensioner.


https://latemodelengines.com/lt-timing-chain-guide.html

[Camaro1973]

Originally Posted by Mark R

I'm going to jump in here for a moment, and ask about this cam chain guide tensioner. I believe you are the only one on this forum who promulgates the theory that oil pump failures are caused by the cam chain guide tensioner failing somehow.

I have been on this forum for 4 years, and I have never heard of this problem from people who have had actual oil pump failures. I'm pretty sure I have read the entire oil pump thread. Can you point to a post on the forum about such a failure?

The oil pump failures on the thread all seem to be cracking failures of the outer ring inside the oil pump. The vanes from the pump rotor eventually snag on the crack, and the inside of the oil pump gets torn up.

I looked at the LME video about their tensioner replacement, and it seems like a normal upgrade for a racing engine, but absent even one post about this on this forum, I'm a little perplexed about this aspect of oil pump failures.

Its a well known issue.



https://www.autoserviceprofessional....r-chevy-camaro

[Mark R]

Originally Posted by Camaro1973

Timing chain tensioner.


https://latemodelengines.com/lt-timing-chain-guide.html

It says 2016 Camaro and 14-16 Corvettes. The article is from April 2021, so if this related to Gen 6 ZL-1s, one might think they would mention 2017-2018 Camaros also.

You state that it is a well-known issue. I just don't see these cam chain types of failures on this forum.