Posted on by

N14 Base Engine Troubleshooting and Repair Manual – 017-002   Cup Plug

Remove

 TOC

 CAUTION 

Do not allow metal shavings to fall in the engine when drilling a hole in the cup plug.

Use a center punch to mark the cup plugs for drilling.

Drill a 1/8-inch hole in the cup plug.

  
SMALL | MEDIUM | LARGE


 CAUTION 

Discard used cup plugs. Do not use them again.

Use a dent puller to remove the plug.

SMALL | MEDIUM | LARGE
   

Clean

 TOC

Clean the cup plug bores.

SMALL | MEDIUM | LARGE
   

Inspect for Reuse

 TOC

Visually inspect the bores for damage.

Repair the bores if necessary.

NOTE: Refer to Section V, “Engine Component Specifications,” for cylinder block cup plug bore dimensions and cup plug dimensions.

SMALL | MEDIUM | LARGE
   

Install

 TOC

Apply a film of cup plug sealant, Part No. 3375068, to the outside diameter of the cup plug.

NOTE: Do

not
install a used cup plug. Discard all plugs after removal.

SMALL | MEDIUM | LARGE
   


Install the cup plug with the appropriate cup plug driver. Refer to Service Tools catalog, Bulletin No.

3377575.

NOTE: Allow the cup plug sealant to dry for a minimum of two hours after the plug is installed before operating the engine. The plug can come out of the bore if the sealant is

not
dry.

SMALL | MEDIUM | LARGE
   


 CAUTION 

The plug must be installed with the edge of the plug deeper than the leading chamfer to the bore.
 CAUTION 

Do not install the plug too deeply. The cross drilling in the cylinder block may be blocked. If the plug is not installed straight and flat, it must be replaced with a new cup plug.
 
SMALL | MEDIUM | LARGE
Last Modified:  12-May-2003
Avatar photo

Published by Jack

Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.