Crankshaft and Engine Bearing Installation Guidelines

crankshaft and engine bearing installation




 
 
 
 
  
1. Check all connecting rod housing bores for taper, roundness and size, using a bore gauge or inside micrometer. Check for parallelism between the large and small ends of rod. Check condition of bolts and threads.  

crankshaft and engine bearing installation 

2. Check main bearing bores for alignment, taper, roundness and size. Check condition of bolts and threads. 

crankshaft and engine bearing installation

3. Make sure that engine block and crankshaft are clean, checking oil passageways for hidden dirt and debris. Hot water and detergent work best for cleaning. 

crankshaft and engine bearing installation

4. While installing both connecting rod bearings and main bearings, check for proper oil clearance using Clevite Plastigage. 

crankshaft and engine bearing installation

5. With engine block upside down, install the upper main halves, making sure bearing backs and bores are clean and dry.  

crankshaft and engine bearing installation

6. Check oil hole alignment to insure proper oil flow. 

crankshaft and engine bearing installation guide

7. Lubricate all bearings and seal lip surfaces using Clevite Bearing Guard. Bearing guard can be used on any internal engine component as an assembly lube. 

crankshaft and engine bearing installation

8. Place the crankshaft squarely into the main bearings and assemble lower main bearings and caps. Check to insure proper position.  

crankshaft and engine bearing installation

9. Pry crankshaft squarely into the main bearings and assemble lower main bearings and caps. Check to insure proper position.

crankshaft and engine bearing installation

10. Assemble the connecting rod and piston assembly to the crankshaft, using Clevite Bolt Boots to protect crankshaft journals and cylinder walls. Make sure caps match correct rods, and torque bolts to proper OE specifications.  

crankshaft and engine bearing installation

11. With crankshaft forced all the way forward in block, check end clearance between the crankshaft thrust face and the bearing flange to OE specification, using a feeler gauge of proper thickness.  

crankshaft and engine bearing installation

12. Prime engine oiling system before starting engine to assure operation of oil pump and lubrication system immediately upon start-up.


Source: Mahle
  • Posted on   10/07/15 at 11:12:40 AM   by Sara  | 
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