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Thread: 03 chevy coolant leak

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  1. #1
    Join Date
    Jan 2012
    Location
    DFW, TEXAS
    Posts
    594
    heater core lines

  2. #2
    Join Date
    Nov 2009
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    SAN ANTONE
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    781
    you might want to put a pressure tester on the cooling system, the water pump are known to leak all the time.
    06 rcsb, 6two, 231/235, 4.11, pacesetter, 80e, 14 bolt, Nelson tuned
    2011 rcsb 6two swap in the works with 6l90 and boost
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  3. #3
    Join Date
    May 2008
    Location
    wichita falls, tx
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    613
    Quote Originally Posted by blacstar View Post
    heater core lines
    Im with him, it took me forever to find the small leak on my 05 and it turned out to be the heater hoses. Mine was actually leaking from a very small crack on the plastic fittings that clips over the metal lines from the heater core.

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