Head gasket failure....

Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the Intrigue / Aurora 3.5L Twin Cam V6 (Short Star ) , 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.
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jedivman
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Head gasket failure....

Post by jedivman »

More to the point it was clamping force failure mostly on Cylinder #1.

Started out for work Friday and car wouldn't start, started to turn over then just quit. No more cranking just a loud Clunk from the starter. Take to truck to work and I will mess with the car when I get home. I have figured the gaskets were leaking do to drinking coolant so I ordered the head bolts from Northstar Performance a week earlier, just hoped it would last until Monday for tear down. I got to work that morning and the head bolts get dropped off by USPS!!!

Go home Friday night and pull all 4 front plugs, they all look like new for having 102K on them. Get rear backfire valve off and remove the 4 rear plugs, #1 is Soaked!! Crank the engine over a few times and proceed to blow the coolant out of the cylinder and all over the firewall, the cylinder was full and hydrolocked. Reinstall plugs and it fires up instantly, shut engine off and let sit until Monday for the ride in.

Pull the car in at 8:00AM and start unhooking everything under the hood, she looked like this by 10:30AM...

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About an hour later it looked like this....

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Not long after it was this...

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Next morning start drilling and tapping the holes, the most time consuming part of the job...

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Studs going in.....

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Studs in gaskets on.

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The next day around noon ready to go back in....

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Starts right up and runs like a dream. It sucks to spend $1500.00 to have your V8 runs just like it did when new, but I shouldn't have to mess with it again any time soon....
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CMNTMXR57
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Re: Head gasket failure....

Post by CMNTMXR57 »

Nice write up with pics. Sorry to hear, but like you say, at least their re-stud kit will be better than OEM...

And people on here ask if it can be taken out from the top... LOL!
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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

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crash93ssei
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Re: Head gasket failure....

Post by crash93ssei »

This is awesome to see! I wish more people would do this instead of fearing the Northstar for the head gasket issues. Let's get some more pics of the car all cleaned up now :)
Ryan
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2003 Bonneville SSEi - The Black Mirror SOLD!
2002 Bonneville SE - The Mutt Complete 2004 SLE interior, drivetrain, and body harness swap, ECC swap, HUD swap, black GXP wheels, GXP headlights and tinted tails - SOLD
2003 BMW 540i M Sport, 2001 BMW X5 4.4i, 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH
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Re: Head gasket failure....

Post by bobgto65 »

Did you do the work yourself?
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MikeKerr
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Re: Head gasket failure....

Post by MikeKerr »

"Starts right up and runs like a dream. It sucks to spend $1500.00 to have your V8 runs just like it did when new, but I shouldn't have to mess with it again any time soon...."

Is the $1500 part and labor, and if so where did you have the work done?
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CMNTMXR57
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Re: Head gasket failure....

Post by CMNTMXR57 »

He did it himself.
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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2011 Camaro SS
2009 Pontiac G8 GT: L76, Sport Red Metallic
2004 GMC Sierra 2500HD: Victory Red - 8.1L Big Block and Allison
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... RIP
1999 Chevrolet Suburban: Sunset Gold Metallic - RIP
jedivman
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Re: Head gasket failure....

Post by jedivman »

I did the job myself at work with a few of the other mechanics all pitching it.

The Stud kit was $550.00 shipped and I also replaced the water pump, thermostat, oil pressure sending unit and al gaskets.

I would never in a million years dream of yanking the engine from the top, that's just WAY to much work. It comes out the bottom, as intended, way to easy to deviate from it.

The car actually runs way better than it did when I bought it at 82K miles. I assume the Autolight plugs in there where not helping the situation.

This is a repair I would charge the average person $3000.00 to do with warranty.

FWIW, do not ever buy new timing chains, the factory chains or indestructible. Mine had Zero lateral movement what so ever. The guide shoes were perfect and the tensioners were perfect. I installed a new water pump just because, probably didn't need it but it was way to easy to do it with the engine out.
jedivman
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Re: Head gasket failure....

Post by jedivman »

Are the pics showing uop for you guys? All I see at work is a bunch of Red X's!!!
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Re: Head gasket failure....

Post by jedivman »

The engine will come out from the top, but it is twice as much work in all honesty. Not to mention it is a lot easier to drill and tap the block when it is bolted to a 4T80 on a craddle then on any engine stand......
jedivman
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Re: Head gasket failure....

Post by jedivman »

crash93ssei wrote:This is awesome to see! I wish more people would do this instead of fearing the Northstar for the head gasket issues. Let's get some more pics of the car all cleaned up now :)
I would, but I live around Frankenmuth Michigan, with all the salt on the roads here it is a Far cry from being cleaned up! It will be come spring once I take off the snow tires and wheels......

If you have taken apart any engine before the northstar isnt too much different. The hardest part is slowly drilling out and tapping the block. Requires a lot of patience and a big powerful slow 1/2" drill. We started with a 3/8 drill, after we bent 2 bits we pulled out the bigger slower drill and it worked flawlessly......
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crash93ssei
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Re: Head gasket failure....

Post by crash93ssei »

Frankenmuth huh? Not to far from me, I am just outside of Midland.

I have rebuilt engines and transmissions before and have no fear of the Northstar at all, bought an 04 GXP a while back and changed the engine, out the bottom in my dirt driveway without a lift :lol: was a massive pain that way but it ran amazing afterwards, sadly had to sell it though since there was no interest in my 03 SSEi. Recently picked up a 05 GXP with a smoked engine, I was hoping I could fix it easily but turns out the chain tensioner wore through and broke causing the front cams to jump time and the valves to smack the pistons which broke off all the cam followers on the intake cam, so unfortunately it is getting parted out. Eventually I will run across another GXP and stud the block and do some other goodies as well.

You should bring that out for the Michigan meet that I host, probably will be posting a thread in the meets section very soon :)
Ryan
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2003 Bonneville SSEi - The Black Mirror SOLD!
2002 Bonneville SE - The Mutt Complete 2004 SLE interior, drivetrain, and body harness swap, ECC swap, HUD swap, black GXP wheels, GXP headlights and tinted tails - SOLD
2003 BMW 540i M Sport, 2001 BMW X5 4.4i, 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH
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CMNTMXR57
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Re: Head gasket failure....

Post by CMNTMXR57 »

Pics work for me.

I only mentioned the topic of taking it out through the top because I think two posts in this section recently asked if it's feasible to do from above. I answered yes, but that it is extremely difficult and added labor in the long run. I am in complete concurrence that it was meant to be dropped from below, sub-frame and all, and just lift the body off.
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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2011 Camaro SS
2009 Pontiac G8 GT: L76, Sport Red Metallic
2004 GMC Sierra 2500HD: Victory Red - 8.1L Big Block and Allison
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... RIP
1999 Chevrolet Suburban: Sunset Gold Metallic - RIP
jedivman
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Re: Head gasket failure....

Post by jedivman »

I see you're n Sanford, I ran our location in Midland for a few months last year......
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crash93ssei
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Re: Head gasket failure....

Post by crash93ssei »

What shop do you work for?
Ryan
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2003 Bonneville SSEi - The Black Mirror SOLD!
2002 Bonneville SE - The Mutt Complete 2004 SLE interior, drivetrain, and body harness swap, ECC swap, HUD swap, black GXP wheels, GXP headlights and tinted tails - SOLD
2003 BMW 540i M Sport, 2001 BMW X5 4.4i, 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH
1982 Cutlass Supreme - The fun one
MattStrike wrote:It was the worst week of my life! *pause, drinks beer... smiles* But I'm better now!
jackr
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Re: Head gasket failure....

Post by jackr »

I was wondering if you or your shop can do a head job on my car I'm in Detroit and having a hard time finding a shop that would or could do the work.
I'm all in favor of keeping dangerous weapons out of the hands of fools. Let's start with computers...
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crash93ssei
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Re: Head gasket failure....

Post by crash93ssei »

jackr wrote:I was wondering if you or your shop can do a head job on my car I'm in Detroit and having a hard time finding a shop that would or could do the work.
He has not been on here since February, doubtful he will ever see this. I believe he worked for Belle Tire in Frankenmuth though so maybe you might have some luck contacting that shop?
Ryan
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2003 Bonneville SSEi - The Black Mirror SOLD!
2002 Bonneville SE - The Mutt Complete 2004 SLE interior, drivetrain, and body harness swap, ECC swap, HUD swap, black GXP wheels, GXP headlights and tinted tails - SOLD
2003 BMW 540i M Sport, 2001 BMW X5 4.4i, 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH
1982 Cutlass Supreme - The fun one
MattStrike wrote:It was the worst week of my life! *pause, drinks beer... smiles* But I'm better now!
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