Bronco II 2WD V6-177 2.9L (1986)
Valve: Technical Service Bulletins
Valve Adjustment - Shop Manual Revision
Article No.
85-24-20
12/09/85
VALVE (2.9L) - ADJUSTMENT - SHOP MANUAL REVISION
LIGHT TRUCK
1986 RANGER, BRONCO II
The valve adjustment procedure in the 1986 Ranger/Bronco II Truck Shop Manual, Page 21-20-4, incorrectly states the amount of turns on the rocker
arm adjusting screw to set valve lash.
Figure 37 - R.H. SIDE VIEW - 2.9L EFI ENGINE
The procedure in the Shop Manual states adjustment screw should be rotated 4.5 turns. The correct procedure should state 1.5 turns (see Figure 37).
WARNING:
Excessive turns on the rocker arm adjustment screw (beyond specification) could result in valve damage.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"
HYDRAULIC TAPPETS
1.
ON CYLINDER TO BE ADJUSTED, POSITION CAMS SO THAT THE TAPPETS ARE IN THE BASE CIRCLE AREA, THEN LOOSEN
ADJUSTING SCREWS UNTIL A DISTINCT LASH BETWEEN THE ROLLER ARM PAD AND THE VALVE-TIP END CAN BE
NOTICED.
2.
THEN CAREFULLY TURN IN THE ADJUSTMENT SCREWS, UNTIL THE ROLLER ARMS SLIGHTLY TOUCH THE VALVES.
