F 150 4WD Pickup V8-302 5.0L (1986)
intake manifold attaching bolts should be 23-25 ft.lbs. (31-34 N-m). Return vehicle to customer for trial period (estimated 1,000 miles). If oil
consumption continues, proceed to Step 3.
3.
Remove rocker arm covers and replace all intake and exhaust valve stem seals. Refer to the following application chart for the correct valve stem
seals.
Service Part
Engine
Service Part
Description
Application
Number
Intake Valve Seals
5.0L
E43Z-6571-A
Exhaust Valve Seals
5.0L
D90Z-6571-A
Exhaust Valve Seals
5.0L H.O.
E2ZZ-6571-A
Figure 12 - Article 87-7-12
Refer to appropriate Shop Manual, Section 21-21, for installing exhaust valve stem oil seals and refer to instructions in tool kit,
T87L-6571-BH, for installing intake valve guide mounted seals. Valve guide, mounted intake valve seals and nylon "umbrella" type exhaust
valve seals are used on these engines. The intake seals must be fully seated onto the guides without being cocked. The exhaust seals should
be attached to ride along with the valve stem. See Figure 12.
Figure 13 - Article 87-7-12
NOTE:
On passenger car engines, a nylon disk on the intake valve is used as an engine assembly aid and serves no useful function. Remove and throw
away nylon discs, Figure 13.
PART NUMBER
PART NAME
CLASS
E6SZ-9424-A
Intake Manifold
C
Assembly
D90Z-6571-A
Exhaust Valve Seal
AM
E2ZZ-6571-A
Exhaust Valve Seal -
RM
5.0L H.O.
E43Z-6571-A
Intake Valve Seal
A
D7AZ-19B508-A
Contact Adhesive
A
OTHER APPLICABLE ARTICLES: 86-20-4, 86-11-16
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual
Operation
Description
Time
Application
Number
SP870712A
Step 1
0.2 Hr.
All
