>The type IV engine moved the oil cooler around so it was in front of #4 and
this
>should have worked to even out the cooling but then they loaded up the 3-4
side
>of the engine with stuff like EGR, cat & funny heaters. This did not help
#3 at
>all. The fact that all Fuel Injected type IV engines have asymetrical
(un-equal
>path lengths from exhaust valves to tail pipe) exhaust systems can not help
>either.

But in actuality it did at least seem to make 1 as suceptible as 3 to
problems.  FWIW every higher (125k+) mile T4 I've seen is down about evenly
compression wise on 1 and 3 say 1 and 3 at about 85-95 psi, 2 and 4 around
110-120, but the wierd thing, most that I have later torn down (admittedly
only about 5 motors) have suffered a receded INTAKE not exhaust and usually
on 1 not 3.  Still I agree entirely the T4 and T3 for that matter oil cooler
relocations don't seem apt to help that much as they feature restricted
cooling to both cylinders on the 3,4 side but do not hit 3 alone.  In a
waterboxer, should be no favoritism, unless by the exhaust path lengths.

John
janderson@iolinc.net