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11-07-2022, 04:34 PM
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#1 |
  Drives: '86 IROC-Z '18 ZL1 Join Date: Jul 2019
Location: Arizona
Posts: 935
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zl1 coolant pump went bad... was it from cavitation?
So a while back I posted on while I was on the track the car began to surge and what not. long story short I got a ADM v2 reservoir and I thought that fixed the issue. ** I haven't really driven it much since this all happened let alone tracked it since. But I also never had the issue since the adm install.
Anywho, took the car to a shop for a tune and pulley upgrade after I installed my headers/exhaust. I get a call a day later saying when they did the inital dyno run, the car was pulling alot of timing and come to find out it was from the SC not cooling down because of air in the system. They tested the pump and it was dead. I had them replace it while the work was getting done. My question is, was it possible that during that 1 track day, that pretty much made the pump go out? Is this a part known to go out more often than other parts? I'm new to the zl1/lt4 so I'm just trying to understand what caused the failure. **car has 7k miles on it. Last edited by AZIROC; 11-07-2022 at 05:12 PM. |
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11-07-2022, 05:01 PM
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#2 |
      Drives: 2023 Black ZL1 Auto Join Date: Oct 2009
Location: FEMA Region 4
Posts: 2,936
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The most common problem is a little air in the SC intercooler system, which causes it to pull timing. A reservoir usually bleeds the system and prevents it from reoccurring. This is the first post I’ve seen about a pump failure though. I’d say it isn’t as common as air in the cooling circuit
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11-07-2022, 05:13 PM
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#3 | |
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Drives: '86 IROC-Z '18 ZL1 Join Date: Jul 2019
Location: Arizona
Posts: 935
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Quote:
Sorry, I did edit the post. I should have said it was pulling timing cause of air in the system. When they ran the pump, that is when the noticed the pump wasn't working. |
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11-07-2022, 05:42 PM
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#4 |
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Drives: 2023 Black ZL1 Auto Join Date: Oct 2009
Location: FEMA Region 4
Posts: 2,936
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Haven’t seen any bad pump threads. I’d see if the problem returns after a new pump. At least they found a likely culprit.
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11-07-2022, 11:46 PM
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#5 |
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Super Stock
Drives: Chevrolet Camaro ZL1 Join Date: May 2022
Location: Concordia
Posts: 1,004
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I have seen a mention of a failing pump before but the failure rate is super low. Not very common it happens so just know that you shouldn't have an issue with it again at this point.
__________________
2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% lower, Griptec OE upper, NGK HR7 Ruthenium plugs, Nostrum 25+ injectors, XDI Goliath HPFP, Katech dual in tank LPFP, Katech oil pump, LME tensioner, DOD delete, LT1 big fuel cam, Jokerz ported blower, MPI lid, GMS hood extractor bracket, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, 186* LS3 T-stat, Borla X pipe, Black Widow Angry Housewife/ Corsa NPP mufflers, BMR engine mounts, Banks iDash, Lithium Battery, AEM X- Series, HP Tuners, E85, 16.5 psi
758 HP/ 804 TQ  |
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11-08-2022, 11:18 AM
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#6 | |
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Drives: '86 IROC-Z '18 ZL1 Join Date: Jul 2019
Location: Arizona
Posts: 935
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Quote:
That's a plus. When I did a Google search I didn't see many threads on it |
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11-08-2022, 12:51 PM
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#7 | |
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Drives: '86 IROC-Z '18 ZL1 Join Date: Jul 2019
Location: Arizona
Posts: 935
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Quote:
The car is done getting tuned and the shop called me. obviously car is running great now. He even said this was only the 2nd pump he's seen go bad since the lt4s came out. I am just glad they caught it and were able to fix it. Not really eanting an extra bill but rather it go out while at the shop. It would figure id get 1 of those 1 in a million bad pumps. Haha |
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