Volvo Workshop Manuals
V90 L6-2.9L VIN 96 B6304S (1998)
Powertrain Management > Fuel Delivery and Air Induction > Fuel Return Line > Component Information > Description and Operation > Page 2027
Fuel Return Line: Testing and Inspection
Check the fuel lines for damage, leaks and corrosion.
Make sure the lines are properly seated in their rubber support grommets, otherwise they can cause a moaning noise in the passenger compartment.
Inspect all hoses for age, cracks and oil saturation.
Repair any defects as necessary.
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