Engine Block Plugs; Special Service Tools; Expansion Type; Cup Type - Ford LRG-423 Service Manual

01-18 Engine Service
01-18
SERVICE PROCEDURES (Continued)
Engine Block Plugs
SPECIAL SERVICE TOOL(S) REQUIRED
Description
Impact Slide Hammer
Impact Slide Hammer
Removal and Installation
Tool Number
T59L-100-B
T50T-100-A
To remove a large core plug, drill a 12.70mm (l/2 inch)
hole in the center of the plug and remove with an
Impact Slide Hammer T59L-100-B or T50T-100-A or
pry it out with a large drift punch. On a small core plug,
drill a 6.35mm (l/4 inch) hole in the center of the plug
and pry it out with a small pin punch. Clean and
inspect the plug bore.
Prior to installing a core plug, the plug bore should be
inspected for any damage that would interfere with the
proper sealing of the plug. If the bore is damaged, it
will be necessary to true the surface by boring for the
next specified oversize plug.
Oversize plugs are identified by the OS stamped in the
flat located on the cup side of the plug.
Coat the plug and/or bore lightly with an oil-resistant
(oil galley) Stud and Bearing Mount EOAZ-19554-BA,
or equivalent, meeting Ford specification
WSK-M2G349-Al or Threadlock 262 E2FZ-19554-B,
or equivalent, meeting Ford specification
WSK-M2G351 -A6, and install it following the
procedure for cup-type or expansion-type below:
Expansion-Type
Expansion-type core plugs are installed with the flange
edge inward. The maximum diameter of this plug is
located at the base of the flange with the flange flaring
inward.
CAUTION: It is imperative to push or drive the plug
into the machined bore using a properly designed
tool. Under no circumstances is the plug to be
driven using a tool that contacts the crowned
portion of the plug.This method will expand the
plug prior to installation and may damage the plug
and/or plug bore.
When installed, the trailing (maximum) diameter must
be below the chamfered edge of the bore to effectively
seal the plugged bore.
If the core plug replacing tool has a depth seating
surface, do not seat the tool against a non-machined
(casting) surface.
Cup-Type
Cup-type core plugs are installed with the flanged
edge outward. The maximum diameter of this plug is
located at the outer edge of the flange. The flange on
cup-type plugs flare outward with the largest diameter
of the outer (sealing) edge.
CAUTION: It is imperative to pull the plug into the
machined bore by using a properly designed tool.
Under no circumstances is the plug to be driven
into the bore using a tool that contacts the flange.
This method will damage the sealing edge and will
result in leakage and/or plug blowout.
The flanged (trailing) edge must be below the
chamfered edge of the bore to effectively seal the
plugged bore.
A321 7-E
Item
Part
Number
Description
1 -
Cup-Type Core Plug
Replacer Tool - Typical
2 6026 Engine Block Plug -
Cup-Type
3 -
Expansion-Type Core Plug
Replacer Tool - Typical
4 6026 Engine Block Plug -
Expansion-Type
A - Sealing Edge Before and
After Installation