Replacing rear spark plugs. : Bonneville GXP/Northstar Powered Cars

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Replacing rear spark plugs.

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Bill's GXP

Post subject: Replacing rear spark plugs.

Posted: Sun May 26, 2013 10:45 pm

SE Member

Joined: Thu Dec 13, 2012 9:56 pm
Posts: 24
Location: My other car is a firetruck
Year and Trim: 2004 Bonneville GXP

The fronts were as Rodney said " a piece of cake", but the rears look like a bi*ch. How and what do you need to remove that "sensor" mounted over the VC? Does that hose carry water? The other pipe, I have no idea where it goes. I see the bracket bolts are 10mm. Any help is appreciated.

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2004 Bonneville GXP
One of 2,143 built and one of 300 in Liquid Silver.

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repinS

Post subject: Re: Replacing rear spark plugs.

Posted: Sun May 26, 2013 10:50 pm

Moderator

Joined: Mon May 19, 2008 9:51 pm
Posts: 7391
Location: Toronto, Canada
Year and Trim: 09 G8 GT

No water involved, that's an air pump shutoff valve for emissions. From here: bonneville-gxp-northstar-powered-cars/topic19774.html

CMNTMXR57 wrote:

1) Remove strut tower brace
2) Remove Secondary A.I.R. shut off valve. This is the big piece in the center of the rear cam cover. You'll need a long extension with either a swivel or U-joint and a 10mm socket to get the nuts off the exhaust flange. From there, the same 10mm works on the bolts that hold it to the cam cover. You will need a 10mm wrench on the one bolt a socket can't get to. Disconnect A.I.R. feed from the pump (the big rubber hose).

Have at it... They replace the same as the front.

This is what I sent to you via PM. I thought you got it;

Quote:

NP. It's the same as the front, except you need to remove the Secondary A.I.R. shut-off valve that sits right in the center, on top of the cam cover. And before that, I would remove the Strut tower brace. I believe that's a 13mm bolt. They're a threaded nut, so don't worry about having issue putting it back in.

You're gonna need some extensions, and a swivel or u-joint, with a 10mm deep well socket. This will be used to undue the nuts on the exhaust flange for that the Secondary A.I.R. system feed into. From there, a combination of a 10mm wrench and 10mm socket will undue the bolts holding it to the cam cover. Disconnect the electrical harness, as well as the feed tube from the Secondary A.I.R. pump.

With this, you can take it all off, put it aside, and you're free as you are in the front (sans a little tighter workspace.

Having been through the process myself, some of the fasteners will have to be done blind - and don't drop them down the back of the motor! Overall it wasn't too bad.

_________________

Jerry /// Past: 95 SSEi (June 2010 COTM) -- 04 GXP (July 2011 COTM)
91 Honda Civic Wagon DX 2WD (fuelly) -- 208,000km -- 92hp -- Autocross Warrior
09 Lexus LS460 AWD -- 94,000km -- Daily Driver
09 White Hot G8 GT -- 155,000km (fuelly) -- LS3 Cam -- GM LS3 CNC Ported Heads -- Kooks 1 3/4" Long Tube Headers -- Solo Catback Midsection -- Hooker Maxflow Mufflers -- Pat G Tune -- Rotofab Intake -- Tein S-Tech Springs -- GXP FE3 Dampers -- BMR Subframe Cradle Inserts -- BMR Subframe Connectors -- Forgestar F14 Gold 18x9 +40 -- Michelin Pilot Super Sport 245/45/18 -- Maverick Man Carbon Fiber Spoiler

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CMNTMXR57

Post subject: Re: Replacing rear spark plugs.

Posted: Tue May 28, 2013 11:20 am

Certified Bonneville Nut

Joined: Wed May 13, 2009 10:45 pm
Posts: 5827
Location: CHICAGO
Year and Trim: 2006 STS-V, 2004 GTO, 2009 G8 GT

Saved me some typing.

_________________

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
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

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L82shark

Post subject: Re: Replacing rear spark plugs.

Posted: Wed May 29, 2013 8:04 pm

SLE Member

Joined: Mon Sep 24, 2012 11:22 pm
Posts: 30
Year and Trim: 04 Bonneville GXP

get a small magnet and stick in your socket to get the nuts back on the AIR flange. You don't want to lose those. It looks like beyatch but it really wasn't that bad once I got into it.

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Bvill_GXP

Post subject: Re: Replacing rear spark plugs.

Posted: Thu Jun 13, 2013 2:31 pm

GXP Member

Joined: Sun Jul 05, 2009 6:17 pm
Posts: 247
Location: Greenville, SC
Year and Trim: 2005 GXP

Yea me and my buddy did mine and the rear really wasn't that bad.... We did find that the gasket on that AIR Flange thingy was not put on correctly and was causing air to escape b/c the area around it was black.... We cleaned it off and after the plugs was installed we put the gasket back in place ( matched up the screw holes )...

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2005 Bonneville GXP Fully Loaded

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Nezzies 2005 GXP

Post subject: Re: Replacing rear spark plugs.

Posted: Fri Aug 23, 2013 7:21 pm

LE Member

Joined: Sun Apr 07, 2013 1:27 am
Posts: 7
Location: Homer Glen,Illinois
Year and Trim: 2005 Bonneville GXP

I used a small mirror to see the blind spots.

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[ 6 posts ]

Portal » Board index » Mechanical and Maintenance (no chat or performance) » Bonneville GXP/Northstar Powered Cars

All times are UTC - 5 hours [ DST ]

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