JBC2005 Posted July 7, 2007 Report Posted July 7, 2007 1994 Grand Prix 3100 4spd Auto Today I finally got around to changing the plugs. Changed the front three with no problems. Started to change the back three, and broke the middle plug, GRRRRR! Out of the dozen or so cars I've owned, this is the first plug I've broken. Is there any way I can get this out without pulling the head? Any advice, please! Thanks Jon Quote
Crazy K Posted July 7, 2007 Report Posted July 7, 2007 how broken? did the ceramic break off or did the metal hex head part shear off the threaded part? Quote
Crazy K Posted July 7, 2007 Report Posted July 7, 2007 perhaps it can be removed with an easy out??? sounds like hell though. Quote
JBC2005 Posted July 7, 2007 Author Report Posted July 7, 2007 Gonna try tomorrow to remove it WITHOUT pulling the head. I'll remove the alternator and bracket, colipack, ignition module and dogbones, move the engine forward and see how much room I'm gonna have. I'll let you know! Jon Quote
rockfangd Posted July 9, 2007 Report Posted July 9, 2007 that happened to my friends malibu and an easy out worked well Quote
Pontiac6KSTEAWD Posted July 9, 2007 Report Posted July 9, 2007 Only thing to watch out for is debris in the cylinder area. Could cause problems at start up.. Quote
88red4cyl Posted July 9, 2007 Report Posted July 9, 2007 May I ask what exactly an easy out is? Quote
Pontiac6KSTEAWD Posted July 9, 2007 Report Posted July 9, 2007 its kinda looks like a drill bit, but with reverse threads. Its designed to grab whats left of the bolt after drilling it out, and thread it out. Kinda hard to explain.. Quote
1990lumina Posted July 9, 2007 Report Posted July 9, 2007 You drill a hole into the broken off piece, and then hit it with an easy oil. It grabs the small hole you drilled and digs in to the surrounding metal and you'll once again have a grip on the plug..but depending how seized it is in there it may not work. Quote
GutlessSupreme Posted July 9, 2007 Report Posted July 9, 2007 how in god's name did you do that? it must have been in there tight as hell! Quote
intern8tion9l Posted July 9, 2007 Report Posted July 9, 2007 that sucks teh balls. figures that whenever something bad happens, it happens on the back 3 that are like impossible to work on Quote
JBC2005 Posted July 10, 2007 Author Report Posted July 10, 2007 I got it out, no debris in the cylinder, but the car won't idle. Computer trouble code "MAP sensor or low circuit". Bad MAP sensor or vacuum leak? If leak, where could it be? Quote
rockfangd Posted July 10, 2007 Report Posted July 10, 2007 sometimes a faulty plug will break like that. it is more common on ac delco originals Quote
Pontiac6KSTEAWD Posted July 10, 2007 Report Posted July 10, 2007 Theres a main vacume line on the back of the motor, actually 2 of them. They come out under the upper plenum, right next to the transmission dipstick. Quote
Crazy K Posted July 10, 2007 Report Posted July 10, 2007 I got it out, no debris in the cylinder, but the car won't idle. Computer trouble code "MAP sensor or low circuit". Bad MAP sensor or vacuum leak? If leak, where could it be? did you forget to hook up a vac line? Quote
JBC2005 Posted July 10, 2007 Author Report Posted July 10, 2007 I can hear a hiss from around the location of the canister purge valve solenoid at the back of the engine. Do these crack? If so, would a leaky purge valve set off the MAP error code on the computer? This is gonna drive me nuts! Thanks Jon Quote
kuwaitliberation Posted July 10, 2007 Report Posted July 10, 2007 I can hear a hiss from around the location of the canister purge valve solenoid at the back of the engine. Do these crack? If so, would a leaky purge valve set off the MAP error code on the computer? This is gonna drive me nuts! Thanks Jon The vaccuum hose is about the size of a coffee stir straw. It is black and runs across the back of the engine. You can pull it off by blowing on it. More likely than not, it is hanging down where you can't see it. I would start from the drivers side as it is probably still connected around the egr valve. If you need pics, I can only give you the pics of what the 3.4 looks like, so... Quote
JBC2005 Posted July 11, 2007 Author Report Posted July 11, 2007 Pics would be great, thanks! Jon Quote
kuwaitliberation Posted July 15, 2007 Report Posted July 15, 2007 Pics would be great, thanks! Jon Took me forever to log back in. Been busy with my girls. Anyway, the pic titles are self explaintory. The vacuum hose runs from the EGR - along the top of the firewall - to the left side (front) of the engine into a vacuum control valve which is hooked to the manifold (this is how it gets the vacuum) - through the firewall - into the A/C valve control unit which is under the glove box. [attachment deleted by admin] Removed to free up storage space. Quote
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