How should engine lines close to inlets be labeled?

How should engine lines close to inlets be labeled?

• A. Use decals only
• B. Paint is used on lines in engine compartments, where there is the possibility of tapes, decals, or tags being drawn into the engine induction system.
• C. Attach metal tags only
• D. Use color-coded markers only

Answer: (B)

Labeling lines near engine inlets must be permanent and durable, because anything attached as tape, decal, or tag can be drawn into the induction system and cause engine damage or misreadings. Painting the lines in the engine compartment provides a permanent, heat- and fuel-resistant marking that remains legible under typical service conditions. Tapes, decals, or tags can peel, wear off, or become dislodged and sucked into the intake, and metal tags can also risk snagging or ingestion. Relying on color-coded markers alone may not offer the same level of durability and permanence. Therefore, paint is the preferred method for labeling lines close to inlets.

Labeling lines near engine inlets must be permanent and durable, because anything attached as tape, decal, or tag can be drawn into the induction system and cause engine damage or misreadings. Painting the lines in the engine compartment provides a permanent, heat- and fuel-resistant marking that remains legible under typical service conditions. Tapes, decals, or tags can peel, wear off, or become dislodged and sucked into the intake, and metal tags can also risk snagging or ingestion. Relying on color-coded markers alone may not offer the same level of durability and permanence. Therefore, paint is the preferred method for labeling lines close to inlets.