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Thread: brodix alum bbc block with blown head gaskets-liners dropped

  1. #1

    brodix alum bbc block with blown head gaskets-liners dropped

    have a 572 bbc quad whipple fuel injected 1280 hp engine in eliminator boat and for the last 3 years have been running fine with the merlin 2 block. Now just installed a brand new brodix aluminum block to save weight and it only made 10-15 passes before it blew the cometic head gasket between cylinder 5 and 7. After tear down we noticed the liners have dropped a few thousands and probably caused this problem. Block was prepared from well known engine shop in new orleans. WHAT CAUSED THE LINERS TO DROP? SHOULDNT THE LINERS HAVE BEEN SEATED WHEN THE BLOCK WAS HONED WITH THE DECK PLATES AND THEN DECKED LAST?

  2. #2
    Senior Member MASTER BUILDER
    Join Date
    Dec 2005
    Location
    Rutherfordton North Carolina
    Posts
    192
    All new blocks need to have the sleeves seated before decking. the blocks are heated to install the sleeves and the aluminum shrinks approximately twice as far as the iron sleeve.Bill
    Hendrens Racing Engines
    1310 U.S. Hwy 221 North
    Rutherfordton N.C. 28139
    828-286-0780 Bill, Steve, Mike
    www.hendrensracingengines.com


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