Marquis V6-232 3.8L VIN 3 TBI (1985)
Spark Plug: Customer Interest
Engine - Spark Knock/Hesitation/Surging
Article No. 84-16-16-S
SPARK KNOCK - 3.8L - SPARK PLUG DEPOSITS
HESITATION - 3.8L - SPARK PLUG DEPOSITS
SURGING - 3.8L - SPARK PLUG DEPOSITS
IDLE - POOR QUALITY - 3.8L - SPARK PLUG DEPOSITS
IDLE - RPM LOSS - 3.8L - SPARK PLUG DEPOSITS
STALLS - 3.8L - SPARK PLUG DEPOSITS
FORD 1982 GRANADA, T-BIRD, 1983-84 MUSTANG, T-BIRD, LTD
LINCOLN-MERCURY 1982 COUGAR, XR-7, 1983-85 CAPRI, COUGAR, MARQUIS
LIGHT TRUCK 1982-83 F SERIES
CALIBRATIONS:
All 3.8L engines.
WARNING:This modification is authorized only for the listed engines. Performing this modification on other engine
calibrations is unauthorized and could create liability under applicable federal or local law.
This article supersedes TSB 84-16-16. The above drive concerns can be caused by oil ash deposits on the spark plug tips
caused by oil leakage past the valve stem seals. When diagnosing these concerns, check spark plugs for oil ash deposits and for
oil fouling, and, if present, replace the intake valve oil seals as follows:
1.
Remove the valve covers.
2.
Remove the rocker arm, key, retainer and valve spring from the intake valve only.
3.
Remove and discard the umbrella shaped valve stem seal from the intake valve.
4.
Install the new seal over the intake valve stem and onto the valve guide. Be sure the seal is fully seated.
5.
Spark plugs that are oil fouled or exhibit oil ash deposits should be replaced.
PART NUMBER
PART NAME
CLASS
E3DZ-6571-A
Seal - Intake Valve Stem
A
(Std.)
AWSF 54C
Spark Plugs
A
WARRANTY STATUS:
Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION:
SP6571A85
TIME: 2.3 Hrs. DLR. CODING: Basic Part No. 6571 - Code: 40
