I dont have a Bentley (yet) and cant find a spec sheet anywhere.....can someone please tell me what the new bore size and out-of-spec bore limit is for a AHU? Looking at a motor that is apart and want to see if it is going to need a rebore. The guy said the motor has 225,000 miles, but I tell you the bores looked perfect....hone marks still clearly visible, and no ridge at top of bore was discernable...so who knows. I measured the bore with my crappy T-guage and came up with 3.130".
Bore is 79.5 mm, or 3.13". Looks like you should be good.
AHUs seem to be pretty much invincible in that respect. Mine had 180K when I tore it apart. The bearings were worn to nothing, but the bores are still perfect. A quick hone and it's good to go
Thanks for the info fellas.