Jeep Cherokee

 Service Manual

Engine » 2.5L engine » Cleaning and inspection
Cylinder block

CLEANING

Thoroughly clean the oil pan and engine block gasket surfaces.

Use compressed air to clean out:

•  The galley at the oil filter adaptor hole, the filter bypass hole (Fig. 89).
•  The front and rear oil galley holes (Fig. 90) (Fig. 91).
•  The feed holes for the crankshaft main bearings.

Once the block has been completely cleaned, apply Mopart Thread Sealant with Teflon to the threads of the front and rear oil galley plugs. Tighten the plugs to 41 N·m (30 ft. lbs.) torque.

INSPECTION

Inspect the cylinder bores for signs of scorring, pitting or cracks. If the cylinder bores are scorred or pitted the cylinder bores will require boreing or honing to clean them up. Refer to Honing Cylinder Bores in this Section. If the cylinder bore(s) are cracked the cylinder block must be replaced.

Inspect the cylinder block to cylinder head mating surface for flatness and/or pitting.

Fig. 89 Oil Filter Adaptor Hole

1 - FILTER BYPASS HOLE
2 - OIL FILTER ADAPTOR HOLE

Fig. 90 Front Oil Galley Hole

1 - FRONT OIL GALLEY HOLE

Fig. 91 Rear Oil Galley Hole

1 - REAR OIL GALLEY HOLE

Rocker arms and push rods

Engine cylinder head

Cylinder block