Steps 121-144

Engine













NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces that enters the oil passages, coolant passages or the oil pan, may cause engine failure.

NOTE: The engine comes equipped with either a roller primary timing chain or an inverted tooth primary timing chain. The roller timing chain engine comes equipped with either a composite RH timing chain guide requiring the timing chain to ride on the outer side of the guide or a stamped steel RH timing chain guide requiring the timing chain to ride on the inner side of the guide. All roller timing chain engine replacement RH timing chain guides will be the stamped steel design.

NOTE: For additional information, refer to the exploded view under the Assembly procedure.

121. Support the cylinder head on a bench with the head gasket side up. Check the cylinder head distortion and the cylinder block distortion. For additional information, refer to Engine System - General Information Cylinder Head Distortion and Cylinder Block Distortion.

122. Remove the coolant inlet tube.
- Remove and discard the O-ring seals.





123. Remove the 2 bolts and the KS.





124. Remove the 8 bolts and the coolant pump.





125. Remove the 16 oil pan bolts.





126. Install 2 of the oil pan bolts (finger-tight) into the 2 threaded holes in the oil pan.
- Alternately tighten the 2 bolts one turn at a time until the oil pan-to-cylinder block seal is released.
- Remove the oil pan.





127. Remove the 2 bolts and the oil pump screen and the pickup tube.
- Discard the O-ring seal.





128. Remove the 3 bolts and the oil pump.





129. Remove the 8 crankshaft rear seal retainer bolts.





130. Install the 2 M6 oil pan bolts (finger-tight) into the 2 threaded holes in the crankshaft rear seal retainer.
- Alternately tighten the 2 bolts one turn at a time until the crankshaft rear seal retainer-to-cylinder block seal is released.
- Remove the crankshaft rear seal retainer.





131. NOTICE: Only use a 3M(TM) Roloc(R) Bristle Disk (2-in white, part number 07528) to clean the engine front cover, oil pan and crankshaft rear seal retainer plate. Do not use metal scrapers, wire brushes or any other power abrasive disk to clean the engine front cover, oil pan and crankshaft rear seal retainer plate. These tools cause scratches and gouges that make leak paths.

Clean the engine front cover, oil pan and crankshaft rear seal retainer plate using a 3M(TM) Roloc(R) Bristle Disk (2-in white, part number 07528) in a suitable tool turning at the recommended speed of 15,000 rpm.

- Thoroughly wash the engine front cover, oil pan and crankshaft rear seal retainer plate to remove any foreign material, including any abrasive particles created during the cleaning process.

132. Before removing the pistons, inspect the top of the cylinder bores. If necessary, remove the ridge or carbon deposits from each cylinder using an abrasive pad or equivalent, following manufacturer's instructions.

133. NOTE: The main bearing cap support brace bolts must be discarded and new bolts must be installed. They are a tighten-to-yield design and cannot be reused.

Remove the bolts in the sequence shown.

- Remove the main bearing cap support brace.

- Discard the bolts.





134. NOTE: The connecting rod cap bolts are a torque-to-yield design. The original connecting rod cap bolts will be used when measuring the connecting rod large end bore during assembly. The connecting rod cap bolts will be discarded after measurement.

NOTE: Clearly mark the position and orientation of the connecting rods, connecting rod caps and connecting rod bearings for reassembly.

Remove the connecting rod cap bolts and cap.





135. NOTICE: Do not scratch the cylinder walls or crankshaft journals with the connecting rod.

Remove the piston/rod assembly from the engine block.





136. Repeat the previous 2 steps until all the piston/rod assemblies are removed from the engine block.

137. NOTE: The 8 main bearing cap side bolts and the 8 main bearing cap bolts must be discarded and new bolts must be installed. They are a torque-to-yield design and cannot be reused.

NOTE: Clearly mark the position and orientation of the main bearing caps for reassembly.

Remove the 8 main bearing cap side bolts and the 8 main bearing cap bolts in the sequence shown.

- Discard the bolts.





138. NOTE: If the main bearings are being reused, mark them for correct position and orientation for reassembly.

NOTE: Note the position of the thrust washer on the outside of the No. 4 rear main bearing cap.

Remove the 4 main bearing caps.





139. NOTE: Note the position of the 2 thrust washers on the inside and outside of the rear main bearing bulkhead.

Remove the crankshaft.





140. NOTE: Inside shown, outside similar.

Remove the 2 crankshaft thrust bearings from the rear main bearing bulkhead.





141. NOTE: If the main bearings are being reused, mark them for correct position and orientation for reassembly.

Remove the 4 crankshaft main bearings from the cylinder block.





142. NOTE: If the main bearings are being reused, mark them for correct position and orientation for reassembly.

Remove the 4 crankshaft main bearings from the main bearing caps.





143. Inspect the cylinder block, bearing cap support brace, pistons and connecting rods. For additional information, refer to Engine System - General Information Procedures.

144. NOTICE: Place clean, lint-free shop towels over exposed engine cavities. Carefully remove the towels so foreign material is not dropped into the engine. Any foreign material (including any material created while cleaning gasket surfaces) that enters the oil passages or the oil pan, may cause engine failure.

NOTICE: Do not use wire brushes, power abrasive discs or 3M(TM) Roloc(R) Bristle Disk (2-in white, part number 07528) to clean the sealing surfaces. These tools cause scratches and gouges that make leak paths. They also cause contamination that will cause premature engine failure. Remove all traces of sealant.

Clean the sealing surfaces of the cylinder block in the following sequence.

1. Remove any large deposits of silicone or gasket material.

2. Apply silicone gasket remover and allow to set for several minutes.

3. Remove the silicone gasket remover. A second application of silicone gasket remover may be required if residual traces of silicone or gasket material remain.

4. Apply metal surface prep to remove any remaining traces of oil or coolant and to prepare the surfaces to bond. Do not attempt to make the metal shiny. Some staining of the metal surfaces is normal.

5. Make sure the 2 engine front cover locating dowel pins are seated correctly in the cylinder block.