Detroit Diesel — Install Outboard Bearing Support (Front)
Repair & overhaul · Crankshaft Outboard Bearing Support (Front)
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Use new bolts and washers each time the bolts are disturbed and at time of overhaul.
Procedure
- Apply a thin film of Lubriplate over a new oil seal ring and place the seal ring over the collar on the back side of the bearing support.
- Apply a light coat of engine oil to the area of the crankshaft where the bearing will ride and position the bearing support over the crankshaft up against the front cover.
- Make sure the mating flange surfaces are clean and dry.
- Slide new hardened flat washers on the seven special support attaching bolts.
- Install the bolts through the bearing support into the front cover, holding the support in a downward position.
- Snug all the bolts with a hand wrench and then tighten to 71-75 lb-ft.
- Check the bearing-to-crankshaft clearance with a 1/4" wide feeler gage.
- Install the vibration dampers and crankshaft pulley.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Bearing support bolts 71-75 lb-ft (96-102 N·m)
- Bearing clearance minimum .001" top; .0033"-.0097" bottom
Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.