Re: 505 XN6 head specs

Charles Lincoln (clincoln@SpiritOne.com)
Wed, 29 Jul 1998 11:36:53 -0700

> Joe Grubbs <jsgrubbs@ipass.net> (7/28/98 10:59 PM):
>I know I've asked this before, but I cannot find my notes.
>Does anyone know the minimum thickness allowed on an XN6
>head. Or, how much can I shave off an original.
>Also, I'd like to use beefier valve springs--what other
>engines use stronger springs that will also fit an XN6 head?
>Any ideas?

According to my manual:
Nominal Height 92.5 mm +/- 0.15
Maximum allowable warpage 0.10 mm
Nominal height after refacing 92.10 mm (ie. minimum height)

Another interesting point I discovered, which I mention since head gasket
replacement often comes up and because I never know whether gasket sealer
should be used or not, nor on which side (or both) it should be used.

There is a XN6 service bulletin stating that to prevent coolant leaks,
use Permatex High Tack Spray-A-Gasket Adhesive Sealant on both sides of
the head gasket.

Charlie Lincoln 1987 505 Liberte Sedan, 144k
Portland, Oregon USA (XN6, Bosch K-Jet, ZF4HP22 AT)
503/636-1154 1988 Peugeot 18 speed
clincoln@spiritone.com (mileage unknown)