How do you identify a 0331 head.
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Year: 01 Limited
Model: Cherokee
Engine: 4.0L I6 Power Tech
How do you identify a 0331 head.
Purchased a 2001 Cherokee Limited some time ago and wondered if there was a way to look at the engine and determine if it still has the 0331 or if it has been replaced?
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Year: 1999
Model: Cherokee (XJ)
Engine: 4.0L
Should be able to take the oil cap off and look right inside to see the TUPY casting, if it was replaced with a 0331 series.
If it was replaced with a non-0331 head (unlikely), you can find the casting number just below the middle of the injector rail, partially covered by the valve cover.
If it was replaced with a non-0331 head (unlikely), you can find the casting number just below the middle of the injector rail, partially covered by the valve cover.
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Year: 2000
Model: Cherokee(XJ)
Engine: Golen 4.6L
Should be able to take the oil cap off and look right inside to see the TUPY casting, if it was replaced with a 0331 series.
If it was replaced with a non-0331 head (unlikely), you can find the casting number just below the middle of the injector rail, partially covered by the valve cover.
If it was replaced with a non-0331 head (unlikely), you can find the casting number just below the middle of the injector rail, partially covered by the valve cover.
For the casting number, look on the driver's side of the head near the center, and you'll see a number peeking out from under the valve cover, like so:
Again, the original will have this number, and the replacements with the fixed deck will also have this number. The only way you won't see "0331" there is if someone has swapped in an earlier head.
To find out which 0331 you have, shine a light down in the oil filler cap and look at the surface of the head between the #3 and #4 cylinders. Below is a pic another member here posted a while back of an original 0331 on the left, and a Clearwater 0331 on the right.
You'll notice that the Clearwater head (right) has a number cast into it between the #3 and #4 cylinders, near where the original 0331 liked to crack. The original 0331 (left) has nothing cast into that spot.
A TUPY head will have "TUPY" cast into it right there, like so:
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