[ZX-10R]

All seem to be failing in the same spot where that little cutout for pin is located. Hard to believe even the replacement failed! In any other universe this would be a recall but GM would go broke. This doesn't seem to happen as frequently with the SS Camaro right?

[jvandy50]

Originally Posted by Vtor_ZL1

Pump on work order from 9/30/2020 is Part No. 12686434, description reads Pump 1.652


Which I believe is still the current pump!! So I get another one.. thanks GM - heart is warm w joy.

lol i bet, this is the "revised" PN pump i picked up...damnit

[Mark R]

Originally Posted by ZX-10R

All seem to be failing in the same spot where that little cutout for pin is located. Hard to believe even the replacement failed! In any other universe this would be a recall but GM would go broke. This doesn't seem to happen as frequently with the SS Camaro right?

It's hard to believe this continues year after year. That cutout is simply a crack waiting to happen. If they had machined a bulge into that ring, and a cut-out in the case where the pin goes, the ring would have rotated on its strongest point, not the weakest point.

[RobZL1]

Originally Posted by Mark R

It's hard to believe this continues year after year. That cutout is simply a crack waiting to happen. If they had machined a bulge into that ring, and a cut-out in the case where the pin goes, the ring would have rotated on its strongest point, not the weakest point.

I'm sure it passed 100k mile, stringent durability testing, with a pretty harsh engine loading schedule. I'm sure it passed everything they threw at it. Just something different going on here. Maybe the additional snout load from the supercharger belt or something- who knows. But, heck, they still would have tested the LT4 engine on the same durability program.

I'm just going to enjoy my 2017, and if the oil pressure drops before I plan to do a cam, then I'll just do the cam earlier than planned.

[ZX-10R]

Originally Posted by RobZL1

I'm sure it passed 100k mile, stringent durability testing, with a pretty harsh engine loading schedule.

?

More likely it was all computer simulated stress analysis with some limited real world testing. It's a fatigue failure at a thin spot in the pump housing, there is no mystery or "something different going on" - failures are random with no connection to viscosity. Hard throttle before oil has reached temp (at least 180 F) could be a contributor

Good ol GM

[Mark R]

Originally Posted by ZX-10R

?

More likely it was all computer simulated stress analysis with some limited real world testing. It's a fatigue failure at a thin spot in the pump housing, there is no mystery or "something different going on" - failures are random with no connection to viscosity. Hard throttle before oil has reached temp (at least 180 F) could be a contributor

Good ol GM

An oil pump should not be on the verge of failure such that cold oil makes it break. This is a total fail by GM.

[Katech_Mike]

Originally Posted by taylorforschool@gmail.com

I think it would be interesting if Katech would tell us in terms of power of their part is 2x or 3x or maybe 1.5x stronger than the updated OEM. Idk if it’s that’s simple, but I’d be curious to know just HOW MUCH stronger the katech is over the revised oil pump from GM. Maybe see all 3 pumps compared on a scale as supposedly the revision is confirmed to be stronger

Our pump internals are made of 4140 steel where as the factory is some type of cast or potted metal.

I can throw the OEM vane housing on a concrete floor and it cracks in half.

I can put ours in a vice and beat it as hard as I can with a mini sledge hammer and it won't break.

[RobZL1]

Originally Posted by ZX-10R

?

More likely it was all computer simulated stress analysis with some limited real world testing. It's a fatigue failure at a thin spot in the pump housing, there is no mystery or "something different going on" - failures are random with no connection to viscosity. Hard throttle before oil has reached temp (at least 180 F) could be a contributor

Good ol GM

Well, then I stand corrected. They certainly used to do actual fatigue testing, at both component level at the supplier and assembly level at GM. But it's been decades since I was in that business. I'd think they would have caught infantile failures in some level of stress testing, though. I used to have to beat the crap out of parts.

Regardless, there are too few failures for any other approach from GM's perspective. Repair the ones that fail under warranty, and that's that.

[Boost or bust]

Hey, gang. Surprised nobody has initiated a class action suit against GM, since they know about this problem. Safety issue? Heck yes…just saying. Any lawyers out there? Can we strong arm GM into doing the right thing?

[Z OH 6]

Originally Posted by Boost or bust

Hey, gang. Surprised nobody has initiated a class action suit against GM, since they know about this problem. Safety issue? Heck yes…just saying. Any lawyers out there? Can we strong arm GM into doing the right thing?

LOL.

[Vigilante375]

Originally Posted by Boost or bust

Hey, gang. Surprised nobody has initiated a class action suit against GM, since they know about this problem. Safety issue? Heck yes…just saying. Any lawyers out there? Can we strong arm GM into doing the right thing?

Just like the lawsuit that never happened for the 04 GTO where the plastic engine cover would cut into the thin rubber fuel line and cause the car to catch fire?

GM "fixed" it by adding a thicker piece of rubber on the area that get cut in the 05/06 GTO.

Even then, the lawsuit would only go towards the affected vehicles that have prove it failed. The ZL1 lawsuit I mean.

[Mark R]

Originally Posted by Boost or bust

Hey, gang. Surprised nobody has initiated a class action suit against GM, since they know about this problem. Safety issue? Heck yes…just saying. Any lawyers out there? Can we strong arm GM into doing the right thing?

You can't sue for damages that have not happened. So far, GM is fixing all that are breaking, per the experience of owners on this forum. That seems to be their strategy. Fix what breaks and run out the clock.

[Vtor_ZL1]

Run out the clock is the bit that troubles me and i'm guessing most owners holding the title!

[Stevezx900]

10 year 100k engine warranty sounds good to me.
Oil pump only will work.