Blown out LS3 water pump rear plug - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ZX1truth · 05-09-2021, 10:39 PM

Has anyone here blown out their LSX/ LS3 water pump rear panel/plug????? I was making a hard pass tuning the Pro EFI computer today and this water pump rear plug blew out on my 427LSX TT motor.

ZX1truth · 05-10-2021, 09:26 PM

Wow.......guess no one else has ever had this issue??? Anyone??? Well I am going to replace the old LS3 with a high performance PRW high volume water pump.

https://store.prw-usa.com/1434601-wa...ation-as-cast/

Greenhornet2 · 05-11-2021, 09:33 AM

I've seen freeze plugs blow out from a blown head gasket but never a water pump plug. If your not losing compression into your cooling system I'd assume the plug just wasn't sealed correctly.

ZX1truth · 05-15-2021, 10:46 PM

Quote:

Originally Posted by Greenhornet2

I've seen freeze plugs blow out from a blown head gasket but never a water pump plug. If your not losing compression into your cooling system I'd assume the plug just wasn't sealed correctly.

Thanx GH........ My LSX has screwed in freeze plugs. The WP was 11 years old and I am hoping that is why it blew. I am checking compression next.

*SSE 4 2SS* · 05-16-2021, 12:29 AM

I’ve blown a radiator out, swelled it, from a leaking head gasket and lotsa boost... Gasket was leaking due to the boost....and some giggle gas... lol... Radiator never leaked a drop... I swapped it out for an aluminum aftermarket radiator...

I’m guessing you are aware there is a pressure sensor you can use for the coolant system with ProEfi... A sudden spike in pressure (Indicative of a sudden head gasket leak due to boost or combustion chamber pressures) will put you into limp mode or even kill the motor...

stevieturbo · 05-18-2021, 02:33 PM

On my LS2 pump I have noticed the rear plug moving a little, but it's never actually come all the way out.

Given the diameter of it, even with say 15psi in the system, that's a lot of force acting on it as it's pretty large diameter

SSyclone · 06-17-2022, 09:07 PM

I know I'm dragging up a year old post.

Yes I just did this two weeks ago. Is this just a fluke. My car is an 11, lsa conversion etc. I've never even seen a drop of coolant leakage. Then during a hard pass..... Her water broke.

Anyone else do this?

caper · 06-18-2022, 12:51 PM

pretty sure this happened to me as well, driving normally lol. lost all water within seconds. blew the whole pump apart is what the mechanic said lol.

Scott S · 07-13-2022, 12:08 PM

I had it happen on a Silverado with a new GM pump from Rock Auto...

05-09-2021, 10:39 PM	#1
ZX1truth Drives: 2010 2SS/RS Join Date: May 2010 Location: USA Posts: 592	Blown out LS3 water pump rear plug Has anyone here blown out their LSX/ LS3 water pump rear panel/plug????? I was making a hard pass tuning the Pro EFI computer today and this water pump rear plug blew out on my 427LSX TT motor. Attached Images __________________ LME built LSX427 w/t all Callies internals\| AGP 65/65 TT \| Holley Sniper Intake \| Brodix BR3/LME custom ported \| LME custom cam \| Pro EFI 112 ECU \| ID-1700x \| NGK BR7EF \| AGP's-Fore Triple Fuel pump \| Monster LT1-S Triple \| ZL1 3.23 diff, CF driveshaft, ZL1 axles \| Hurst Line Lock \| MGW Retro Short Throw \| Pfadt solid subframe mounts \| Prothane Motor Mounts \| Revshift Poly Trans insert \| Ground Control camber/caster plates \| Accelerated Racing Solutions tuned\| God is too good! I don't deserve it, but I sure will accept it!!! Last edited by ZX1truth; 05-10-2021 at 08:57 PM.

05-10-2021, 09:26 PM	#2
ZX1truth Drives: 2010 2SS/RS Join Date: May 2010 Location: USA Posts: 592	Wow.......guess no one else has ever had this issue??? Anyone??? Well I am going to replace the old LS3 with a high performance PRW high volume water pump. https://store.prw-usa.com/1434601-wa...ation-as-cast/ __________________ LME built LSX427 w/t all Callies internals\| AGP 65/65 TT \| Holley Sniper Intake \| Brodix BR3/LME custom ported \| LME custom cam \| Pro EFI 112 ECU \| ID-1700x \| NGK BR7EF \| AGP's-Fore Triple Fuel pump \| Monster LT1-S Triple \| ZL1 3.23 diff, CF driveshaft, ZL1 axles \| Hurst Line Lock \| MGW Retro Short Throw \| Pfadt solid subframe mounts \| Prothane Motor Mounts \| Revshift Poly Trans insert \| Ground Control camber/caster plates \| Accelerated Racing Solutions tuned\| God is too good! I don't deserve it, but I sure will accept it!!!

05-11-2021, 09:33 AM	#3
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	I've seen freeze plugs blow out from a blown head gasket but never a water pump plug. If your not losing compression into your cooling system I'd assume the plug just wasn't sealed correctly. __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

05-16-2021, 12:29 AM	#5
SSE 4 2SS Boosted Moderator Drives: Bone Stock LS3 Join Date: Sep 2009 Location: Marion Tx Posts: 15,476	I’ve blown a radiator out, swelled it, from a leaking head gasket and lotsa boost... Gasket was leaking due to the boost....and some giggle gas... lol... Radiator never leaked a drop... I swapped it out for an aluminum aftermarket radiator... I’m guessing you are aware there is a pressure sensor you can use for the coolant system with ProEfi... A sudden spike in pressure (Indicative of a sudden head gasket leak due to boost or combustion chamber pressures) will put you into limp mode or even kill the motor... Attached Images __________________ If the car feels like it is on rails, you are probably driving too slow. -Ross Bentley Horsepower is how fast you hit the wall. Torque is how far you take the wall with you. “If everything seems under control, you're just not going fast enough.” Mario Andretti If you can turn, you ain't going fast enough...

06-17-2022, 09:07 PM	#7
SSyclone Drives: 2011 2SS Inferno Orange Join Date: Oct 2013 Location: Cedar Hill, MO Posts: 60 View My Garage	I know I'm dragging up a year old post. Yes I just did this two weeks ago. Is this just a fluke. My car is an 11, lsa conversion etc. I've never even seen a drop of coolant leakage. Then during a hard pass..... Her water broke. Anyone else do this? __________________ 2011 Camaro SS Buckets of money under hood!

05-18-2021, 02:33 PM	#6
stevieturbo Drives: it changes Join Date: Nov 2010 Location: Norn Iron Posts: 1,126	On my LS2 pump I have noticed the rear plug moving a little, but it's never actually come all the way out. Given the diameter of it, even with say 15psi in the system, that's a lot of force acting on it as it's pretty large diameter

06-18-2022, 12:51 PM	#8
caper Drives: 2010 IOM 2ss/RS Join Date: Sep 2009 Location: SoCal, I.E. Posts: 1,545	pretty sure this happened to me as well, driving normally lol. lost all water within seconds. blew the whole pump apart is what the mechanic said lol. __________________ Turbonetics running 8lbs boost at 700rwhp tuned by Hi Rev, installed by K&M w/cat-muffler delete, ACS splitter, Fesler GFX, MPD1 spoiler, Custom painted Rally stripes, Cordon CR1 wheels 275/315s, Hotchkiss comp sways and end links, Barton shifter

07-13-2022, 12:08 PM	#9
Scott S Scott S Drives: 2011 Camaro 2SS Join Date: Sep 2018 Location: Minnesota Posts: 156	I had it happen on a Silverado with a new GM pump from Rock Auto... __________________ 769HP/699 Torque LS3 heads ported and polished with BTR Spring kit & Trunion upgrade, LSA supercharger ported by DC Porting, 102MM throttle Body, 2.40 pulley upper pulley, Innovators West 10% Overdrive lower, BTR Stage 3 PDS Blower Cam, Mighty Mouse Catch Can, SMG Flex Fuel kit, SMG Aux Fuel System, FIC 1000 Injectors, MGW Flat Stick Shifter, RPM Stage Vll Transmission, McLeod RXT clutch, ARH 1 7/8 Headers, 3" X-pipe with Borla S-Type mufflers, ZL1 3:23 rear diff and Axles, 1LE suspension. Bmr Bushings in back. TUNING AND SPECIAL ALIGNMENT BY CARL@Twincitiesperformance