Assembly - Ford Ranger Maintaince And Repair Manual

Varnish build−up or C−clip groove burrs may increase the difficulty of removing the wrist pin. If
necessary, use a punch or drift to carefully tap the wrist pin out.
3. Insure that the wrist pin bushing in the connecting rod is usable, and lubricate it with assembly lube.
4. Remove the wrist pin from the new piston and lubricate the pin bores on the piston.
5. Align the forward marks on the piston and the connecting rod and install the wrist pin.
6. The new C−clips will have a flat and a rounded side to them. Install both C−clips with the flat side
facing out.
7. Repeat all of the steps for each piston being replaced.

ASSEMBLY

Before you begin assembling the engine, first give yourself a clean, dirt free work area. Next, clean every
engine component again. The key to a good assembly is cleanliness.
Mount the engine block into the engine stand and wash it one last time using water and detergent
(dishwashing detergent works well). While washing it, scrub the cylinder bores with a soft bristle brush and
thoroughly clean all of the oil passages. Completely dry the engine and spray the entire assembly down with
an anti−rust solution such as WD−40® or similar product. Take a clean lint−free rag and wipe up any excess
anti−rust solution from the bores, bearing saddles, etc. Repeat the final cleaning process on the crankshaft.
Replace any freeze or oil galley plugs which were removed during disassembly.
Crankshaft
1. Remove the main bearing inserts from the block and bearing caps.
2. If the crankshaft main bearing journals have been refinished to a definite undersize, install the correct
undersize bearing. Be sure that the bearing inserts and bearing bores are clean. Foreign material under
inserts will distort bearing and cause failure.
3. Place the upper main bearing inserts in bores with tang in slot.
The oil holes in the bearing inserts must be aligned with the oil holes in the cylinder block.
4. Install the lower main bearing inserts in bearing caps.
5. Clean the mating surfaces of block and rear main bearing cap.
6. Carefully lower the crankshaft into place. Be careful not to damage bearing surfaces.
7. Check the clearance of each main bearing by using the following procedure:
1. Place a piece of Plastigage® or its equivalent, on bearing surface across full width of bearing
cap and about
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HOW TO USE THIS BOOK
1
/ in. off center.
4
ASSEMBLY