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Author Topic:   bad heads
Dirt Maniac

Total posts: 102
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?

Dirt Freak

Total posts: 310
posted January 30, 2003 10:03 PM
I'm not an expert but remember these parts go thru a lot of heat cycles andI would think that it is possible just be glad it was found before you did all the work and did more damage

rico 08
Dirt Freak

Total posts: 372
posted January 31, 2003 05:48 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.

Dirt Freak

Total posts: 368
posted January 31, 2003 05:59 PM
couldn't you weld them up then regrind the seat?

rico 08
Dirt Freak

Total posts: 372
posted February 01, 2003 09:31 PM
not worth it when u can find them everywhere for cheap.

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