Engine - Rough Running/MIL ON/DTC'S Set
Article No.97-25-8
12/08/97
^ RUNS ROUGH - MALFUNCTION INDICATOR LAMP
(MIL) ILLUMINATED - DIAGNOSTIC TROUBLE
CODES (DTC) P0300 THROUGH P0308 MAY BE
STORED IN MEMORY - VEHICLES BUILT THROUGH
11/26/97 EQUIPPED WITH 4.6L OR 5.4L ENGINE
^ LAMP - MALFUNCTION INDICATOR LAMP (MIL)
ILLUMINATED - DIAGNOSTIC TROUBLE CODES
(DTC) P0300 THROUGH P0308 MAY BE STORED IN
MEMORY - VEHICLES BUILT THROUGH 11/26/97
EQUIPPED WITH 4.6L OR 5.4L ENGINE
^ ENGINE - ROLLER FINGER FOLLOWERS
DISLODGE - DURING AMBIENT TEMPERATURES
LESS THAN -18 DEGREES C (0 DEGREES F) -
VEHICLES BUILT THROUGH 11/26/97 EQUIPPED
WITH 4.6L OR 5.4L ENGINE
LIGHT TRUCK:
1997-98 ECONOLINE, EXPEDITION, F-150, F-250 LD
1998 NAVIGATOR
ISSUE:
The roller finger followers may become dislodged and end up loose in the cylinder head during ambient temperatures of less than -18°C (0°F). This may result in damage to the camshaft, roller finger follower, valve, retainer, valve guide, etc.
ACTION:
Refer to the following Service Procedure for details.
SERVICE PROCEDURE
1. Check compression of all cylinders.
2. Remove cam cover from the affected side of the engine which showed low compression readings. Look for a follower that has become dislodged and examine all components for damage (i.e., camshaft, valve, follower, etc.).
^ If damage is found, contact the engine plant Hotline at the numbers listed in this article.
^ If no damage is found, remove all followers from the engine (both sides) and compare to Figure 1 to determine their revision level.
3. If they are the new revision, contact the engine plant Hotline at the numbers listed in this article. It they are the old revision level, replace all followers with new level Followers (F8AZ-6564-AA).
4. Recheck compression of all cylinders to verify proper valve train operation.
5. If compression is within specifications, reinstall the cam covers and any other engine components removed.
6. If the compression is still unacceptable, contact the engine plant Hotline at the numbers listed in this article.
Engine plant telephone numbers:
^ Windsor Engine - (800) 465-4680
^ Romeo Engine - (800) 833-4503
PART NUMBER PART NAME
F8AZ-6564-AA Roller Tip Follower
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emissions Warranty Coverage
OPERATION DESCRIPTION TIME
972508A Compression Test - All 1.0 Hr.
Models
972508B Replace Followers - 3.8 Hrs.
F-Series, Expedition (4.6L
MFI, 5.4L MFI)
972508C Replace Followers - 3.8 Hrs.
Navigator (5.4L MFI)
972508D Replace Followers - 5.6 Hrs.
Econoline (4.6L MFI)
972508E Replace Followers - 5.4 Hrs.
Econoline (5.4L MFI)
DEALER CODING
CONDITION
BASIC PART NO. CODE
6529 33
OASIS CODES: 499000, 608000, 609000, 610000, 614000, 698298