I THINK I\'VE GOT PROBLEMS???
An up date, for those who are new to the board or haven't read the posts about the previous problems that I've had. I've been having problems with my 4.0 head on 4.2 block leaking antifreeze down the sides of the block.. the exposed water jackets were sealed on two different heads that were installed. The first one was sealed up by the mechanic who rebuilt the 258 for me. I would have rebuilt it my self, but being a fulltime senior at a local university and working 30-35hrs a week didn't leave me with a lot of free time. The YJ was my daily driver so I didn't want to have a lot of down time. But it's pretty ironic how things work out.
Anyway, the first head was botched by the mechanic who rebuilt the engine. It was filed up about half way with some sealant compound he used, it wasn't epoxy. The antifreeze ate through and eventualy started to leak, first on the manifold side and then eventually all around the engine. My dad, getting tired of hearing me complain bought a "hesco" 4.0 conversion head. I put it on and....wouldn' you believe it....it is leaking on the manifold side of the engine. I have not even driven it yet. I have let it idle in the driveway twice, once up to operating temp and the second time just for a couple of minutes. Both times it leaked on the manifold side.
So I start thinking that the mating surface on the engine isn't flat. I checked it with a straight edge before I put the new head on and didn't see a problem, but it still leaks not as bad, but then I haven't even driven it yet. I'm pretty pissed at the moment. The only thing that I can think of is that I need to yank the engine out and get the block decked. Rigt now that is my only idea on how to solve it. I know that it is hard to think through problems when you're pissed, so I need a little help. <font color=blue>Is there any other possible solution that anyone can think of? possibly switching to a 258 head gasket, but that is probably a bad idea b/c all the documentation about the swap says to use the 4.0 head gasket.</font color=blue> Well, its the only other idea I've come up with... please help if you can...
Thanks in advance
4.2 w/<font color=blue>(4.0 head & MPI)</font color=blue> (jeep is down need a new head)
Process of a moonguy after beer
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