Date of issue 5/98 Bulletin Number 303-26 Page 1 of 2
5/98V8 XJ Series/XK8
1997 MY-ON XK8 Range
1998 MY-ON V8 XJ Series
Oil Weep – Rear Face of Cylinder Heads
Some vehicles equipped with the AJ-V8 engine may experience oil weeps on the rear faces of
cylinder heads. The cause may be oil weeping past a plug which is expanded, during engine
manufacture, inside the inner (ie. the hole closest to the center-line of the engine) of the two
threaded holes on the back of each cylinder head. These holes (Illustration 1) are also used to
install the rear engine lifting brackets.
In case of a customer complaint of oil weepage that is found to come from the rear of the
cylinder head, install a “Dowty” oil-sealing washer and bolt in the inner hole as described below.
Clean the rear face of the cylinder head before installing the bolt and washer.
Torque: 15 Nm (11 lb ft)
POSSIBLE SOURCE OF OIL WEEPAGE