300Tdi Engine
ENGINE
OVERHAUL
71
6. Check ring to groove clearances:
Top compression = 0.167 to 0.232 mm
2nd compression = 0.05 to 0.08 mm
Oil control rails = 0.05 to 0.08 mm
7. If new ring to groove clearances are excessive,
new pistons must be fitted.
Oil jet tubes - inspection
1. Check that oil passage in each oil jet tube is
clear.
2. Thoroughly clean banjo bolts.
3. Insert a piece of stiff wire in end of banjo bolt
and check that non-return valve can be
depressed to open position and returns to
closed position under spring pressure.
CAUTION: If non-return valve is not
working correctly, replace banjo bolt.
4. Check sealing washers for damage, replace as
necessary.
