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Author Topic:   bad heads
posted January 30, 2003 08:00 PM
oh man I got some bad news today from machine shop. I took my stock heads 993 that was running fine, turns out they are both cracked on the bottom of the 2 center exaust valve pocket! It has never been run hot. Machine shop says because it was run hard and not hot anyone every here of this. I took him a set of 336 heads are they any good?

posted January 30, 2003 10:03 PM
993's are a good casting for later model heads if they we're cracked it's an exception rather than the rule unlike 882's and 624's.

posted January 31, 2003 05:59 PM
couldn't you weld them up then regrind the seat?

rico 08
posted February 01, 2003 09:31 PM
not worth it when u can find them everywhere for cheap.

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