Fulltext TSBs

Technical Service Bulletins

TSB
97-25-8
  • 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 TEMPERTURES LESS THAN -18 DEGREES C (0 DEGREES F) – VEHICLES BUILT THROUGH 11/26/97 EQUIPPED WITH 4.6L OR 5.4L ENGINE
Publication Date: DECEMBER 8, 1997

LIGHT TRUCK:
1997-1998 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 -18C (0F). 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.



    Figure 1 – Article 97-25-8

  3. If they are the new revision, contact the engine plant Hotline at the numbers listed in this article. If 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 NUMBERPART NAME
F8AZ-6564-AARoller Tip Follower

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emissions Warranty Coverage

OPERATIONDESCRIPTIONTIME
972508ACompression Test – All Models1.0 Hr.
972508BReplace Followers – F-Series, Expedition (4.6L MFI, 5.4L MFI)3.8 Hrs.
972508CReplace Followers – Navigator (5.4L MFI)3.8 Hrs.
972508DReplace Followers – Econoline (4.6L MFI)5.6 Hrs.
972508EReplace Followers – Econoline (5.4L MFI)5.4 Hrs.

DEALER CODING

BASIC PART NO.CONDITION CODE
652933

OASIS CODES:

499000, 608000, 609000, 610000, 614000, 698298


Copyright 1997 Ford Motor Company