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coolant crossover pipe, 99 4.8

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Old 02-09-2012, 04:59 PM
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Default coolant crossover pipe, 99 4.8

i need to replace mine, cant seem to find one. called the dealer, and they tell me theres a revised pipe, and a new cover? is this correct, is he talking valley cover?
Old 02-09-2012, 05:32 PM
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that wouldnt supprise me gm's good for that i go thru that all the time working for a dealer and its always great when the parts guys forget to tell you theres another 'updated' part that needs to go with it and you need to call the customer back and get more money and labor
Old 02-09-2012, 05:41 PM
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Curious why do you need to replace yours? It's going to be tough finding one like your original one, as they started blocking off the rear two ports and using a single pipe across the front.
Old 02-09-2012, 06:45 PM
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this one sprung a leak. i think i saw on summit where they have plugs for the back and the pipe for the front.maybe i can find one at the pick a part. any more info appreciated.
Old 02-09-2012, 06:49 PM
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Originally Posted by slow.8
this one sprung a leak. i think i saw on summit where they have plugs for the back and the pipe for the front.maybe i can find one at the pick a part. any more info appreciated.
Is it leaking from the pipe or where it connects to the heads? Could be a gasket leaking if it's from where it connects.
Old 02-09-2012, 07:11 PM
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from the pipe, not where it connects to the heads... the pipe is rusted from where the knock sensors clip to it. developed a crack in the pipe
Old 02-09-2012, 10:18 PM
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is the ls6 coolant pipe kit a direct fit?
Old 02-10-2012, 09:26 AM
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looks like it fits but needs to be bnt to clear the alternator. there isnt much there to bend. im gonna go by pick a part and see if i can find a decent one there.
Old 02-10-2012, 09:33 AM
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I just cut the pipe right close to the blocks at the rear and right close to the Y up front, bend them shut and weld it for extra security. Cheap easy fix!
Old 02-10-2012, 10:22 AM
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simple enough, except i dont have a welder.and dont know how to weld. guy down the road does, what kind of welds
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