Scuba_Steve

So I recently purchased an 09 ZR1 with 66k. The I/C pump stopped working. Checked the fuse, its fine. Ran power to the pump and it popped the tester. Pump is locked up.

I was told a good replacement was a water pump from a Chevy Volt. Has anyone done this? How did you wire it and mount it? TIA!

RedZ4me

How does one know it stopped working?

mykream

https://www.summitracing.com/oh/parts/emp-e2512a

Scuba_Steve

As stated on my OP it's locked up it's not pumping fluid.

phils C5 vette

Make sure you have enough fluid. If you dont, the pump with only run for about 20 seconds and shut off

Scuba_Steve

Wow so no plug and play solution. This one will require different size hoses, wiring and mounting.

Scuba_Steve

Thanks. I did bleed it and fill to make sure it didn't have any air bubbles. Problem was I couldn't get it to turn on to finish the process.

Is the pump supposed to run all the time when the key is on? Is it regulated by IAT? TIA.

Bigjsn250

Why would you not just buy a replacement I/C pump for a ZR1?????

SIK02SS

Unless edited in HP Tuners, it's on a 20 or 30 second turn on delay with ignition on. Other than the delay, if car is running yes it's always on unless it catches air and turns itself off to prevent cavitation

This is the option high hp guys go to (full bolt on or more): https://www.prospeedautosports.com/p...p29-water-pump

Also available from Lingenfelter (just have to verify it's reprogrammed)A custom bracket needs to be made and new lines need to be run. Otherwise if you're stock and plan to stay that way, there's not much better than the factory replacement. Before this EMP the Camaro and Cadillac guys were using our ZR1 pumps

Scuba_Steve

Because they are discontinued.

Rokket

Here is a post with suggestions
https://www.corvetteforum.com/forums...oler-pump.html

phils C5 vette

Its 10 seconds delay in the stock configuration based off the IAT being -13 degrees and MAT 32 degrees ( IAT2)

Bigjsn250

Steve, seriously, they are all over the place. There are probably ten guys minimum on the ZR1 board that have went to the Stewart EMP pump and have those laying around, just ask around. Probably get one for 100 bucks.

stefuel

When you get your replacement pump, don't throw away the old one. Send it to me. I'll rip it apart and see what failed. If they are no longer available, perhaps we can figure out how to repair/rebuild them

stefuel

FYI, my studying of the schematic indicates the + side of the power connector is hot when ever the ignition is on. The ECM switches the ground.

Scuba_Steve

Thanks! I will do that. I found a very nice compact pump on Summit that flows a little more than the ZR1 pump (6gpm) that I'm going to give a try.

phils C5 vette

update?

Fulton 1

Damn, GM. Discontinuing a "reasonably" important part for a 6-year old flagship product with no viable replacement (my understanding is that, even with reduced performance, the LSA pump is not a direct replacement, but somebody please correct me if I'm wrong)? If true, this is disappointing.

GTIMANiac

I see this is an older thread that got dug up. But yes there is a plug and play solution that works great.
https://www.prospeedautosports.com/p...p29-water-pump

9sec

according to the insatll pdf from stewart that pump requieres a full refit of all lines and h/e and expansion tanks to 1" diameter with no more than 1" of restriction. hardly plug and play