Yes that's my only concern.. I've heard of the slow coolant loss with no evidence.. the chocolate milk in crank case.. I'm really hoping that the issues with the 0331 head isn't as bad as the net says (wishful) but un likely. In your opinion what's the likely hood of it going pop..
Also if it has and had been repaired how could I tell.. did they stop making 0331 heads as replacement. .. I guess all this would be pure speculation..
I guess my worry is I don't want to be sending my son down the road wearing a grenade strapped to his manly bits..
Sent from my Moto Z (2) using Tapatalk
I've never heard of one with an 0331 head that didn't go bad at some point. Some of them happened at really low miles, but the higher you get up there in mileage without it having happened yet, the more likely it will happen.
What you'll read below was taken from this thread:
How to identify an 0331 TUPY cylinder head
The 2000 and 2001 4.0 came with the original casting 0331 head. The TUPY head was also a 0331 head that had been redesigned with a thicker deck. You can also buy an aftermarket 0331 head from Clearwater that has a thicker deck to prevent the cracks. All three of these are are 0331 heads because of the design of the ports, and all three of them have "0331" cast into them in the same spot.
If it's been replaced, there's a high probability that it has been replaced with an aftermarket 0331 head that has been redesigned with a thicker deck to prevent cracking. What you want to know is whether you have the original 0331, an aftermarket 0331 or a 0630 head from a '99 or prior.
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: