Thread: 07 GP GT Heater Hose Nipple Retainer Bolt Broken Off

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  1. #1 07 GP GT Heater Hose Nipple Retainer Bolt Broken Off 
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    Was flushing my heater core yesterday and it looked like the bolt for the upper heater hose nipple was loose, so I tried to tighten it a little and POP it broke off . I didn't know it was a shoulder bolt but I didn't really put any force on it to begin with so Im sure it was already seized. So....Anybody have any tips on getting a drill bit in there to use an easy out. I haven't tried removing the bolts from the dog bones and pulling the engine forward but Id assume its the only way Ill have a chance. Im amazed the pressure of the coolant system doesn't pop it out of the engine, guess that O ring holds pretty well but I don't trust it enough to leave it like that. Thanks
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  2. #2 Re: 07 GP GT Heater Hose Nipple Retainer Bolt Broken Off 
    Killa Bee Scottydoggs's Avatar
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    best to take the alt bracket off to work on it, those little bolts face the firewall pretty much.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: 07 GP GT Heater Hose Nipple Retainer Bolt Broken Off 
    Killa Bee Scottydoggs's Avatar
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    to add, you could likely zip tie or wire tie the bracket. when i removed mine to swap to a different alt bracket the in and out tubes really did not want to come off. took some doing to work em off.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  4. #4 Re: 07 GP GT Heater Hose Nipple Retainer Bolt Broken Off 
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    Quote Originally Posted by ScottyDoggs View Post
    to add, you could likely zip tie or wire tie the bracket. when i removed mine to swap to a different alt bracket the in and out tubes really did not want to come off. took some doing to work em off.
    I was thinking the same thing. Maybe use some safety wire
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  5. #5 Re: 07 GP GT Heater Hose Nipple Retainer Bolt Broken Off 
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    I really wasn't sure what you meet earlier when you said remove all bracket lol. I was under the assumption that was the block or head those fittings went in. But after that fitting popped out on the way home from work and I lost all my coolant I figured it out pretty quick. I ending up drilling and tapping the hole and use a new bolt.

    I also change out the thermostat once I flushed the engine and core. The thermostat I removed was off center, can't say I've seen one like that. The new one looks normal

    Thanks for the help, I would have never known that whole assembly come off
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  6. #6 Re: 07 GP GT Heater Hose Nipple Retainer Bolt Broken Off 
    Killa Bee Scottydoggs's Avatar
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    now you know about the coolant elbows too, two birds one stone.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  7. #7 Re: 07 GP GT Heater Hose Nipple Retainer Bolt Broken Off 
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    I didn't replace them but I inspected them pretty good and lubed the O rings. I'm guessing now by your comment that is a failure point?

    I checked them several times and they looked good after getting everything back together and running it so hopefully I'm good. Its pretty easy once I now know what's going on there with everything
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  8. #8 Re: 07 GP GT Heater Hose Nipple Retainer Bolt Broken Off 
    Killa Bee Scottydoggs's Avatar
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    yeah, the upper one likes to blow out, the lower one leaks more than blows out. they sell metal ones now. for a whole 10 bucks at the parts store.

    the plastic ones get brittle from heat over time. then fail.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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