Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Fuel Return Line: Testing and Inspection

Fuel Line Inspection




Check the fuel system lines, hoses, fuel filter, and other components for damage, leaks, and deterioration, and replace them if necessary.

NOTE: When installing a new O-ring, apply silicone oil or polyalkyleneglycol (PAG) oil to the O-ring, and carefully install it into its proper position.





NOTE: Check all hose clamps and retighten them if necessary.

* 1: Apply silicone grease (PARKER CHRISTO-LUBE) to a new O-ring at the fuel filter housing and drain plug, and carefully install it into its proper position. * 2: Apply silicone oil or silicone grease (Shinetsu silicone GR 10M) to a new rubber seal, and carefully install it into its proper position.