What percentage of 2000&2001 heads have actually cracked. The reason I ask is I own a 99 f150 5.4 and according to internet talk if you own a certain yr. model (1999 included) you are going to blow a plug out of the head. I have talked to many F150 owners in the 98 to 2001 range, none have had a plug blowout and most have not even heard of the problem. Obviously it has happened to some people, but what is the percentage. So that is what Im asking about the 2000&2001 0331 head problem. Thanks

 

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I've seen quite a few Ford trucks that have blown a spark plug out, I have only seen one 2000-01 Jeep with a cracked head.

 

Busted I think he might be referring to the 0331 heads.

 

I bought my 2000 with a cracked head, threw a older head on it and its been fine ever since

 

Yeah,I know. The 2000-01 4.0 had the 0331 cylinder head.

 

I've seen one, twas my cousins.

 

I didn't crack my head, but my radiator failed, engine over heated and caused me to blow a head gasket

2001 cherokee

 

I have seen one bad head on a 01 in person. But heard of many.

The 4 banger in old Chevy s10s have the same issue. The alarm system floods the engine with fuel to stop it from starting to prevent theft.. Well when it does start BANG! They shoot spark plugs left and right..