Fuel Filler Cap - Isuzu 4JA1 Workshop Manual

FUEL SYSTEM 6C – 17

FUEL FILLER CAP

General Description
A vacuum valve and pressure valve are built into the fuel filler
cap which adjusts the fuel pressure in the fuel tank to prevent
fuel tank damage.
RTW46CSH000301
Legend
1. Seal Ring
Inspection
The fuel filler cap must be inspected for seal condition.
The fuel filler cap must be replaced if found defective
CAUTION: A replacement fuel filler cap must be the same
as the original. The fuel filler cap valve was designed
primarily for this application and must be replaced with
the same type or decreased engine performance may
occur.