[pauly1119]

Originally Posted by MartinLe

Our 2017s should not be affected. Our build dates are before the bad pumps showed up.

I think the vast majority of failures is 2017 builds. Included 2017 and early 2018 models but all years have seen some failures which is probably somewhat normal.

[george]

I wonder if a failed pump has been analyzed to see if there was a manufacturer failure

[TLSTWIN]

Originally Posted by KamZL1

man i thought i was clear once i got up there in mileage :(

Originally Posted by 1badtie

lol me as well!

Originally Posted by infinitereality

Make that 3 of us that thought that! 2018, 20k, 11/17 build

4 of us..... I am under warranty to 45k or 4 more years

[ZX-10R]

Originally Posted by george

I wonder if a failed pump has been analyzed to see if there was a manufacturer failure

Yes it's been discussed in many previous pages by Katech and others - the metal ring of the pump housing stress cracks and eventually fails (explodes). There is no evidence the '19+ pump is any different

[george]

Originally Posted by ZX-10R

Yes it's been discussed in many previous pages by Katech and others - the metal ring of the pump housing stress cracks and eventually fails (explodes). There is no evidence the '19+ pump is any different

If the 19+ is no different, shouldn't we start to see these failing as well? I hope that this gets elevated and we can get some sort of warranty extension.

[ZX-10R]

Won't happen (warranty extension) - fortunately it's a relatively small number of pumps. Make sure you warm the oil completely before getting on the throttle. Get a Katech wet sump pump installed if you plan to keep the car a long time

It's this and the valve guide issue that seem to be the primary weak points on the LT4, otherwise it's a solid engine. Ring sealing/blowby aren't great though for only 9 psi

[Katech_Zach]

Originally Posted by Mark R

The way I see it, the inner ring cracks at that relief cut, and the PSI drops. That might be for 4 seconds or it might be a couple hours. But eventually one of those vanes snags the crack, and all hell breaks loose. You did great catching it when you did.

Yes, essentially this. What we have discovered is it cracks at the pivot point first, and then either the vane snags into the crack, or the point that is 180 degrees out from the first crack also splits (2 separate pieces for that slider).

If you catch it early enough (the 10-20psi drop stage), there will be nearly no damage to your engine in most cases. We have a 2021 come into the shop with a broken oil pump, he bought the car new, had an oil pressure drop, and had it immediately towed to us. We tore into the shortblock to check it out, and all bearings were in phenomenal shape. We could have put it together as-is, but the customer opted for Clevite bearings, ARP mains, ARP rod bolts, and ARP side bolts.

For anyone that is concerned with a factory oil pump failure, drive your car as you would normally, and just watch after your oil pressure. If you see any unusual large drops that stay low, i would park the car until you choose a direction for repair

[taylorforschool@gmail.com]

Originally Posted by Katech_Zach

Yes, essentially this. What we have discovered is it cracks at the pivot point first, and then either the vane snags into the crack, or the point that is 180 degrees out from the first crack also splits (2 separate pieces for that slider).

If you catch it early enough (the 10-20psi drop stage), there will be nearly no damage to your engine in most cases. We have a 2021 come into the shop with a broken oil pump, he bought the car new, had an oil pressure drop, and had it immediately towed to us. We tore into the shortblock to check it out, and all bearings were in phenomenal shape. We could have put it together as-is, but the customer opted for Clevite bearings, ARP mains, ARP rod bolts, and ARP side bolts.

For anyone that is concerned with a factory oil pump failure, drive your car as you would normally, and just watch after your oil pressure. If you see any unusual large drops that stay low, i would park the car until you choose a direction for repair

Nice sound advice from someone clearly with more knowledge than your average Joe Camaro

[mariojas]

If I see 10psi pressure drop... Will Chevy service do the work or "it works fine? drive"?

[Katech_Zach]

Originally Posted by mariojas

If I see 10psi pressure drop... Will Chevy service do the work or "it works fine? drive"?

Depends on the dealership. Some dealerships will accept the low oil pressure as the trigger to perform the TSB for the oil pump, others require no oil pressure. If your preferred dealership requires a failure, you need to accept no less than a brand new engine. At the point of failure, a bunch of junk runs through your engine.

If you catch it prior to failing (low oil pressure), your engine likely has 0 damage and can be saved with an oil pump replacement

[ZX-10R]

Originally Posted by Katech_Zach

We have a 2021 come into the shop with a broken oil pump, he bought the car new, had an oil pressure drop, and had it immediately towed to us.

So much for "19+ and you're good"

Amazing GM didn't actually fix this back in 2018

[Z/Camaro]

I've read a lot of this but not every page. Would it be fair to say this is more of a ZL1 issue rather than SS? Current have a C8 and I'm already terrified of the DCT issues that have been plauging people. Currently thinking of grabbing a 1SS 1LE 2023 manual before they dissappear but don't want to worry about both cars having issues

[Mark R]

Originally Posted by Z/Camaro

I've read a lot of this but not every page. Would it be fair to say this is more of a ZL1 issue rather than SS? Current have a C8 and I'm already terrified of the DCT issues that have been plauging people. Currently thinking of grabbing a 1SS 1LE 2023 manual before they dissappear but don't want to worry about both cars having issues

The SS cars also have oil pump issues, but I'm not sure how they compare to the ZL-1 failure rate. The best way to prevent problems is to put in a Katech pump and stop worrying about it going forward. I put in the Katech pump last fall, and I don't watch my oil pressure gauge much any more.

[Katech_Zach]

Originally Posted by ZX-10R

So much for "19+ and you're good"

Amazing GM didn't actually fix this back in 2018

They did make revisions, there are 7 part numbers I believe. So I do think the later model years have improved pumps, but they still have chances of failure. Just at a lot less probability. Every time GM releases a new version, we buy one and test it like the rest. We have been able to break every pump we have stressed so far. The newer pumps are harder to break, but they still break.