0331 in last few year 4.0s were bad castings. They crack between cylinder 3&4. Ask me how I know or Google it.jarrod.romero.94 wrote:What would be wrong with 0331?
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Is their antifreeze in the oil? Have you torn it down yet?jarrod.romero.94 wrote:Oh damn.... Yea it's an xj, with a blown hg... now I'm worried lol
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When you pull the valve cover, check carefully. If you see the crack in the head, it's toast.jarrod.romero.94 wrote:Haven't torn it down, it's still in the jeep, and yes there's water in the oil
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SJTD wrote:Where you is?
hat I want to remove to make room for a TDI motor.
If it is cracked, I've got a buddy with a spare head laying around, not sure of the casting number on it either but maybe the gods will bless me with at least one good head all else fails, ill just rebuild the 4.2tedlovesjeeps71 wrote:When you pull the valve cover, check carefully. If you see the crack in the head, it's toast.jarrod.romero.94 wrote:Haven't torn it down, it's still in the jeep, and yes there's water in the oil
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Depending on how much they drove it with coolant in the oil, the bottom end may be done too. Coolant washes the bearings. Maybe you could go cheap and just replace all bearings, find a non-0331 head, and have some luck. Whatever you do, good luck. I sure wasn't expecting all my work when mine happened.
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If you want to keep the coil pack on plug setup you'll need another 0331 (horrible idea! Though ones stamped with TUPY are supposed to not have this issue as they were cast in a different country), find a 0630 or 7120 from a TJ or grand Cherokee, or buy one of the aftermarket options.jarrod.romero.94 wrote:If it is cracked, I've got a buddy with a spare head laying around, not sure of the casting number on it either but maybe the gods will bless me with at least one good head all else fails, ill just rebuild the 4.2tedlovesjeeps71 wrote:When you pull the valve cover, check carefully. If you see the crack in the head, it's toast.jarrod.romero.94 wrote:Haven't torn it down, it's still in the jeep, and yes there's water in the oil
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Depending on how much they drove it with coolant in the oil, the bottom end may be done too. Coolant washes the bearings. Maybe you could go cheap and just replace all bearings, find a non-0331 head, and have some luck. Whatever you do, good luck. I sure wasn't expecting all my work when mine happened.
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Sent from my SAMSUNG-SM-G935A using Tapatalk