Cracked Heads [Archive] - Forum


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06-19-2005, 04:45 PM
What can cause this. I've recently had this happen to me and was stumped as to how it happened. Any info?

06-19-2005, 04:50 PM
only thing i can think of is at a cold start you revved tour engine and it warmed up too quickly

06-19-2005, 07:22 PM
Do you got a pic of the cracks?

06-19-2005, 07:31 PM
aluminum head on an iron block + overheating ? Just an idea.

06-20-2005, 07:26 AM
was your car running somewhat hot?

06-20-2005, 07:57 AM
Ive never heard this happening to a 3400. Cracked heads are somewhat un heard of.

06-21-2005, 09:18 AM
are you sure you have a cracked head?..... if not, it could be the gasket.... here's a link APA (

06-21-2005, 09:33 AM

06-21-2005, 02:56 PM
I would base it more on over torque. I have seen personaly 3400's over heat to the point of being really scary and still havent cracked heads. Not impossible but ive never seen it nor heard of it happening.

06-21-2005, 03:40 PM
no overheating. Definately not overtorqued. The hottest I've ever seen the temp get was probably 230. And now I come to find I have a cracked lim as well. The tab just keeps on going up.

06-22-2005, 06:27 AM
If you had a head gasket fail and the cylinder filled with coolant, the piston comming up may crack the head because water does not compress, so you may have hydrolocked that cylinder. If not, then you may have just had a bad head.

06-22-2005, 03:41 PM
And now I come to find I have a cracked lim as Got any pics of the cracks in the head or intake? This is somewhat intriguing.

06-23-2005, 05:22 AM
I know im really intriqued by this. Sorry Eric i feel bad for ya its just that most of us have never heard of anything like this happening.

06-23-2005, 01:17 PM
I'll get some soon. Going to pick up my car next week.

06-23-2005, 02:00 PM
This might shed some light on things.

Eric were did you get your heads from?

06-24-2005, 12:21 PM
May explain the head...but not the LIM. Also the heads were my stock ones that I sent out to colin(the same guy that did blackrider's heads) to get ported.