Lower Crankcase (Oil Manifold)
This Article Has Been Updated with Bulletin No: 57-61-27 and Bulletin No. 99-06-01-015REMOVE OR DISCONNECT
NOTE: For On-Vehicle Service, remove the transaxle and not the engine. Service and Repair
1. With engine on engine stand remove the following components as described elsewhere in this section:
^ Cylinder heads.
^ Oil pan.
^ Oil pump pickup.
^ Oil scraper / baffle.
^ Connecting rod and piston assemblies.
^ Main bearing bolts.
^ Oil manifold bolts.
^ Oil manifold.
^ Upper / lower crankcase bolts.
Separating Crankcase Halves:
2. Working on either side of crankcase separate crankcase halves by alternately prying in grooves provided until lower crankcase is free of dowel pins.
3. Lower crankcase.
Note: Upper-to-lower crankcase seal may be reused unless it is damaged or comes out of its groove in the upper crankcase.
4. Rear main seal and discard.
5. Crankshaft.
INSPECT
1. Clean each bearing journal and bearing.
2. Check each bearing journal and bearing for damage.
3. If crankshaft journals are damaged or worn beyond dimensions shown in specification table, replace crankshaft. No remachining is allowed on crankshaft journals.
Main Bearings:
INSTALL OR CONNECT
1. Main bearings to upper and lower crankcases.
2. Crankshaft.
3. Measure main bearing clearance.
Crankcase Half Seals:
4. Prior to permanent crankshaft installation lubricate bearing surfaces with Crankshaft Prelube, part number 1052367, and inspect upper crankcase seal to assure that it is in position in crankcase. Seal must not be torn, nicked or out of groove over its entire length on both sides of the crankcase. To replace seal, proceed as follows.
A. Clean block groove.
B. Start seal at both ends and work seal into groove towards center.
Crankshaft:
5. Crankshaft.
6. Lower crankcase over dowel pins.
7. Oil manifold.
Main Bearing Bolts:
8. Twenty main bearing bolts. Inboard bolts have stud head.
9. Ten oil manifold bolts.
10. Eight upper-to-lower crankcase bolts.
IMPORTANT: Main Bearing Bolts/Oil Scraper
The oil scraper is now attached by the inboard (Number 1) and Outboard (Number 3) main bearing bolts instead of the stud/nut arrangement used on previous model years. One stud headed main bearing bolt (Number 4) remains for retention of the oil sump pickup.
Fig. 19 Main Bearing Cap Bolt Tightening Sequence:
TIGHTEN
^ Main bearing bolts to 20 Nm + 65° (15 lb. ft. + 65°) in sequence.
^ Oil manifold bolts to 10 Nm (7 lb. ft.).
^ Upper-to-lower crankcase bolts to 30 Nm (22 lb. ft.).
INFORMATION:
A thread repair kit (Kent-Moore J 42385-500) is available to repair damaged engine block bolt holes for the cylinder head bolts and the crankshaft main bearing bolts. Installation instructions are included with each kit.
MEASURE
^ Crankshaft end play. Gently force crankshaft to extreme front and rear position. Monitor movement of dial indicator on nose of crankshaft. End play should not exceed 0.50 mm (0.019").
11. Connecting rod and piston assemblies.
Oil Scraper / Baffle:
12. Oil scraper / baffle and 10 nuts. Tighten nuts to 25 Nm (18 lb. ft.).
13. Oil pump pickup using new 0-ring. Tighten bolt to 10 Nm (7 lb. ft.).
14. Engine oil pan.
15. Rear main seal.
16. Cylinder heads.