Shawn, in your case it would most likely be a good start to try and fix the sealing of the release piston.
If the engine is on max tolerances, and you want a little more life out of it, I suggest that you buy a 30 mm Shadek pump and do the mods needed to that so it will fit in the T4. - Then you also have the pump needed to when you make the piston oiling modification of the rods. But be sure to replace the old relief spring at the same time, or you will experience way too much bypass at highway speeds, resulting in poor cooling.
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