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Engine Specific Info and Questions => TDI Engine -General Info => Topic started by: boxer246 on February 16, 2008, 06:22:03 pm

Title: AHU bore size
Post by: boxer246 on February 16, 2008, 06:22:03 pm

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".

Title: AHU bore size
Post by: jimfoo on February 16, 2008, 07:05:32 pm

Bore is 79.5 mm, or 3.13". Looks like you should be good.

Title: AHU bore size
Post by: MikkiJayne on February 17, 2008, 01:09:21 am

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  8)

Title: bore
Post by: boxer246 on February 17, 2008, 02:54:17 pm

Thanks for the info fellas.