Poll- who had a failed oil pump on their Camaro? - Page 5

Mountain · 10-09-2018, 02:51 PM

The pumps between LT1 and LT4 are the same, from what I can find. The engines are assembled at different assembly plants, though. The LT1 is Tonawanda and the LT4 is Bowling Green.

I can say, oil pump issues are NOT a significant thing for the LT1.

It looks like there was a part number change on the pumps (12661760 -> 12677142), but no idea what the change was and why, or what the change date is.

Consider two this with service and replacement: 1. how clean and precise is the mechanic working on the engine? 2. If, let's just say, there was a change in the pumps related to LT4 issues... IF.... was service stock of the old part scrapped and then certified?

Chris Edwards · 10-10-2018, 01:35 AM

Quote:

Originally Posted by Mountain

1. how clean and precise is the mechanic working on the engine? 2. If, let's just say, there was a change in the pumps related to LT4 issues... IF.... was service stock of the old part scrapped and then certified?

If you've been inside your average Chevy dealership service bays, they're not exactly confidence inspiring. Depending on the size of the dealership, it can be basically guaranteed they have never disassembled/ reassembled an LT1 or LT4 prior to their first.

ScottV503 · 10-10-2018, 07:52 AM

You can see the two cracks in these pictures the mechanic sent to me of my failed oil pump.

TLSTWIN · 10-10-2018, 09:44 AM

Those aren't cracks, that is split/broke. Wow, right in half.

ScottV503 · 10-10-2018, 09:55 AM

Quote:

Originally Posted by TLSTWIN

Those aren't cracks, that is split/broke. Wow, right in half.

Yeah, that's what I meant. She busted.

Mountain · 10-10-2018, 02:53 PM

Interesting.

For reference, in case someone is not seeing the issue, here is a factory pump that is good (LT1/LT4 wet sump vs LT1/LT4 dry sump picture):

Mountain · 10-10-2018, 03:10 PM

If you look at the pictures of the broken pump and the picture of the "good" pump:

1. The outer, floating race looks to have split and then allow the two halves to float away from each other and the pump vane to get stuck and dislodged.

2. In the broken pump pictures, near the outer floating race dolly (~12 'O-Clock), there appears to either A. be a piece of the pump missing from the inner surface (where the vanes ride) or B. there was a design change from the "good" picture and this is normal.

Did the spring pressure cause the outer, floating race to break, some how with the opposite end getting pegged (pun) by the metal dolly or the pump housing?

FERRARI · 10-10-2018, 07:53 PM

A low oil pressure warning was mentioned by GodzillaKenny. How much warning has anyone gotten? Enough to stop car and minimize engine damage? Engine shut off by itself? Is warning emphatic (shut down right away) or advisory ( your oil pressure is getting low, you might want to consider looking at it)?

GT-ER · 10-10-2018, 08:02 PM

Quote:

Originally Posted by FERRARI

A low oil pressure warning was mentioned by GodzillaKenny. How much warning has anyone gotten? Enough to stop car and minimize engine damage? Engine shut off by itself? Is warning emphatic (shut down right away) or advisory ( your oil pressure is getting low, you might want to consider looking at it)?

I've worked on cars for decades and have had multiple oil pressure failures on random engines. One thing I've always seen is that, assuming your just driving it normally, a loss of oil pressure will give you SEVERAL seconds, if not a few minutes, of driving without any significant damage. Heck, we had to decommission a government vehicle once and, after draining the oil, we redlined it for over a minute and the engine didn't even make any strange noises (other than valvetrain ticking).

With that being said, if you flogging it and you all of a sudden lose pressure, you still will likely not have engine damage, but you odds of having it go WAY up.

Boost or bust · 10-11-2018, 09:17 AM

[QUOTE=FERRARI;10334343]A low oil pressure warning was mentioned by GodzillaKenny. How much warning has anyone gotten? Enough to stop car and minimize engine damage? Engine shut off by itself? Is warning emphatic (shut down right away) or advisory ( your oil pressure is getting low, you might want to consider looking at it)?[

When mine broke the warning light came on and it’s was shut off immediately. GM was not responsive to my inquiries on what the status was, when would they get a new supplier, etc. obfuscation by the gorilla. Maddening. The local dealership took 3 weeks going back and forth with GM to diagnose, repair the issue. Bye bye GM. I have now completed the sale of my car and will NEVER buy another GM product after how I was treated. Also, the feeling of impending doom because replacement pumps are now failing...no thanks.

ScottV503 · 10-11-2018, 11:21 AM

My light came on when I pulled into the pits after the second session. But it didn't come on until I came to a stop to cool it down. The gauge showed no pressure and the warning lights came on. I shut it down. I then thought it odd to have it show up only after I was at idol and not while out on the track. So I started it back up, same thing, no pressure and lights came on. But then I revved it up and the pressure came back to normal and warning lights turned off. I let it idol and the oil pressure dropped to zero and lights came back on, revved it up, lights off, pressure normal.

FERRARI · 10-11-2018, 06:24 PM

Thanks for the responses guys. That information may give those of us who have not (yet?) experienced oil pump failure a fighting chance!

Chris Edwards · 10-11-2018, 06:35 PM

It'd be great if Chevy could issue a TSB and fix them all preemptively. I suppose that wouldn't be conducive to profitability though.

Boosted4life · 10-12-2018, 10:17 PM

Quote:

Originally Posted by Chris Edwards

It'd be great if Chevy could issue a TSB and fix them all preemptively. I suppose that wouldn't be conducive to profitability though.

Who knows, maybe they will in the future, but it sounds like they would have to create an entirely new part since the replacement pumps are failing.

View Poll Results: Who has experienced an oil pump failure?
2016 or earlier	20	13.79%
2017	53	36.55%
2018	67	46.21%
2019	2	1.38%
2020	2	1.38%
2021	1	0.69%
Voters: 145. You may not vote on this poll

10-10-2018, 07:52 AM	#59
ScottV503 Drives: 2018 ZL1 (A10) Join Date: May 2014 Location: Fairview, Or Posts: 74	Picture of my failed oil pump You can see the two cracks in these pictures the mechanic sent to me of my failed oil pump. Attached Images

10-10-2018, 09:44 AM	#60
TLSTWIN Romans10:9-13 Drives: /\yes, this is me/\ Join Date: Nov 2008 Location: Vermilion, Ohio Posts: 4,435	Those aren't cracks, that is split/broke. Wow, right in half. __________________

10-10-2018, 07:53 PM	#64
FERRARI Drives: 2017 ZL1 10 Speed Auto Join Date: Dec 2016 Location: SE Massachusetts Posts: 89	A low oil pressure warning was mentioned by GodzillaKenny. How much warning has anyone gotten? Enough to stop car and minimize engine damage? Engine shut off by itself? Is warning emphatic (shut down right away) or advisory ( your oil pressure is getting low, you might want to consider looking at it)? __________________ Previous cars: 1964 Pontiac GTO 1967 Pontiac GTO 1969 Pontiac GTO Judge 2004 Pontiac GTO 2006 Pontiac GTO

10-11-2018, 06:24 PM	#68
FERRARI Drives: 2017 ZL1 10 Speed Auto Join Date: Dec 2016 Location: SE Massachusetts Posts: 89	Thanks for the responses guys. That information may give those of us who have not (yet?) experienced oil pump failure a fighting chance! __________________ Previous cars: 1964 Pontiac GTO 1967 Pontiac GTO 1969 Pontiac GTO Judge 2004 Pontiac GTO 2006 Pontiac GTO

10-09-2018, 02:51 PM	#57
Mountain Drives: 2017 SS 1LE, 2016 1SS (previous) Join Date: Apr 2016 Location: Metro-Detroit Posts: 1,863	The pumps between LT1 and LT4 are the same, from what I can find. The engines are assembled at different assembly plants, though. The LT1 is Tonawanda and the LT4 is Bowling Green. I can say, oil pump issues are NOT a significant thing for the LT1. It looks like there was a part number change on the pumps (12661760 -> 12677142), but no idea what the change was and why, or what the change date is. Consider two this with service and replacement: 1. how clean and precise is the mechanic working on the engine? 2. If, let's just say, there was a change in the pumps related to LT4 issues... IF.... was service stock of the old part scrapped and then certified?

10-10-2018, 02:53 PM	#62
Mountain Drives: 2017 SS 1LE, 2016 1SS (previous) Join Date: Apr 2016 Location: Metro-Detroit Posts: 1,863	Interesting. For reference, in case someone is not seeing the issue, here is a factory pump that is good (LT1/LT4 wet sump vs LT1/LT4 dry sump picture):

10-10-2018, 03:10 PM	#63
Mountain Drives: 2017 SS 1LE, 2016 1SS (previous) Join Date: Apr 2016 Location: Metro-Detroit Posts: 1,863	If you look at the pictures of the broken pump and the picture of the "good" pump: 1. The outer, floating race looks to have split and then allow the two halves to float away from each other and the pump vane to get stuck and dislodged. 2. In the broken pump pictures, near the outer floating race dolly (~12 'O-Clock), there appears to either A. be a piece of the pump missing from the inner surface (where the vanes ride) or B. there was a design change from the "good" picture and this is normal. Did the spring pressure cause the outer, floating race to break, some how with the opposite end getting pegged (pun) by the metal dolly or the pump housing?

10-11-2018, 09:17 AM	#66
Boost or bust Drives: 2018 ZL1 M6 Join Date: Dec 2017 Location: CA Posts: 301	[QUOTE=FERRARI;10334343]A low oil pressure warning was mentioned by GodzillaKenny. How much warning has anyone gotten? Enough to stop car and minimize engine damage? Engine shut off by itself? Is warning emphatic (shut down right away) or advisory ( your oil pressure is getting low, you might want to consider looking at it)?[ When mine broke the warning light came on and it’s was shut off immediately. GM was not responsive to my inquiries on what the status was, when would they get a new supplier, etc. obfuscation by the gorilla. Maddening. The local dealership took 3 weeks going back and forth with GM to diagnose, repair the issue. Bye bye GM. I have now completed the sale of my car and will NEVER buy another GM product after how I was treated. Also, the feeling of impending doom because replacement pumps are now failing...no thanks.

10-11-2018, 11:21 AM	#67
ScottV503 Drives: 2018 ZL1 (A10) Join Date: May 2014 Location: Fairview, Or Posts: 74	My light came on when I pulled into the pits after the second session. But it didn't come on until I came to a stop to cool it down. The gauge showed no pressure and the warning lights came on. I shut it down. I then thought it odd to have it show up only after I was at idol and not while out on the track. So I started it back up, same thing, no pressure and lights came on. But then I revved it up and the pressure came back to normal and warning lights turned off. I let it idol and the oil pressure dropped to zero and lights came back on, revved it up, lights off, pressure normal.

10-11-2018, 06:35 PM	#69
Chris Edwards Drives: 2017 ZL1 Join Date: Jan 2018 Location: California Posts: 165	It'd be great if Chevy could issue a TSB and fix them all preemptively. I suppose that wouldn't be conducive to profitability though.

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