Engine - Knocking Noise From Left Side at Start Up

Article No.
99-26-5

12/27/99

^ ENGINE - 4.0L SOHC - "KNOCKING" HEARD FROM
LEFT HAND SIDE OF ENGINE AT START UP

^ NOISE - "KNOCKING" HEARD FROM LEFT HAND
SIDE OF ENGINE AT START UP - VEHICLES WITH
4.0L SOHC

FORD:
1997-2000 EXPLORER, MOUNTAINEER

ISSUE
A "knocking" noise at start up for up to 2 minutes from the left hand front chain cassette area may occur on some vehicles. After engine shutdown, the tensioner oil supply gallery empties. The noise may be due to air entering the left hand tensioner when the engine is restarted.

ACTION
Replace the left hand camshaft tensioner with a revised Tensioner Kit. Refer to the Instruction Sheet within the Tensioner Kit for service procedure details.

WARNING
THE XU2Z-6K254-AA TENSIONER KIT IS FOR INSTALLATION ON THE LEFT SIDE OF THE ENGINE ONLY. INSTALLATION OF THIS KIT ON THE RIGHT SIDE OF THE ENGINE MAY RESULT IN ENGINE FAILURE. IF A TENSIONER IS NEEDED FOR THE RIGHT SIDE OF THE ENGINE, USE KIT XU3Z-6K254-BA.

PART NUMBER PART NAME

XU2Z-6K254-AA Tensioner Kit - Left Side
XU3Z-6K254-BA Tensioner Kit - Right Side

OTHER APPLICABLE ARTICLES: NONE

WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATION DESCRIPTION TIME

992605A Install Camshaft Tensioner 1.6 Hrs.
Kit

DEALER CODING
CONDITION
BASIC PART NO. CODE
6K254 42

OASIS CODES: 497000, 702100