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  1. 02-09 General Tech Q&A
    Tightening by hand using ratchet, head snapped off the bolt. What size is the bolt/thread pitch/length or part number?
    bolt cpas snapped
  2. The "How-To" and DIY Section
    So I have seen several posts all over about GM broken TTY bolts. I have been an auto mechanic for 20 years, most as private fleet mechanic. This is the first time I have encountered this problem with head bolts. I took the head off of a 2006 4.2 L6 because of bad valves. I tried the hammer and...
    4.2 bolt broke head main
  3. OEM Issues
    Can anyone tell me if the GM P/N 11569841 Main Bearing Cap Bolt (for 2003 Bravada AWD, 2.4 I6 Vortec) is still a TTY bolt equivalent to the original installed? New bolt has no 'built-in washer', has longer threads (2.125" vs 1.550" on old), similar Ø 0.354" body, but now Ø0.387 under the head...
    bolt main bearing tty
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