dawesy1700 Posted November 5, 2009 Report Posted November 5, 2009 what are the symptoms of a cracked head please? because last year i was running bike carbs when, for no reason, the car starts to drive like poo on long runs and round town, stuttering and misfiring, but it wouldnt do at full throttle (thats not me making up excuses to use the loud pedal ), so i thought it was the carbs and busted my nut trying to work out what was happening, then the car went to the bodyshop and i stripped the engine to find that it had cracked between the valves on number 4 pot, and its a biggy, it even dropped a piece of metal into the chamber and has scored the bore, soooo, could all my problems have been the head all along? its a 1660 xflow btw. advice would be lovely.
escort21 Posted November 5, 2009 Report Posted November 5, 2009 If its cracked it aint worth repairing, bore block and new head
Admin Vista Posted November 5, 2009 Admin Report Posted November 5, 2009 If its cracked it aint worth repairing, bore block and new head Not true strictly speaking as it depends on the head in question but in this case (i.e. a X-flow) yes I'd agree and yes the symptoms described are almost certainly down to the crack.
john_3.0s Posted November 5, 2009 Report Posted November 5, 2009 sounds like a cracked head. typically big valve xflows suffer a bit from this but I have had two repaired in the past with no probs at all
Toby Posted November 5, 2009 Report Posted November 5, 2009 Depending on the crack you may be able to insert the seat area like when you do a lead free conversion.
dawesy1700 Posted November 5, 2009 Author Report Posted November 5, 2009 i'll get sum pics up tonight if they're clear enough, but the crack goes well past the valve seat, i've already sourced a replacement standard head and will be getting it modified in a few months, but i think you've all answered my question, as to whether the running problems were carb or head related, nice one.
samurai Posted November 5, 2009 Report Posted November 5, 2009 i'll get sum pics up tonight if they're clear enough, but the crack goes well past the valve seat, i've already sourced a replacement standard head and will be getting it modified in a few months, but i think you've all answered my question, as to whether the running problems were carb or head related, nice one. If the crack has gone past the seat then its best to replace the head
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