Volvo Penta 3593534 Turbocharger Oil Return Hose (Superseded by 23845356)

Volvo Penta 3593534 – Turbocharger Oil Return Hose

Part Number: 3593534
Brand: Volvo Penta
Official Part Type: Hose – Turbocharger Oil Return
System: Turbocharger Oil Return Circuit
Diagram Position: Position 16 in the turbocharger oil return pipe assembly, connecting adjacent oil return pipe components (21294908 and 21098797)
Superseded By: 23845356 – this is the current active OEM ordering number. If your parts lookup returns 3593534, order 23845356 instead.

What This Part Does

This short hose connects the oil return pipe sections in the turbocharger oil drain circuit, routing used oil from the turbocharger back to the engine sump. A leak or failure in this hose results in oil loss at the turbo drain, which can cause oil contamination in the intake and accelerate turbocharger wear if not caught early.

Compatible Applications

• Volvo Penta diesel engines with turbocharger oil return pipe assemblies – confirm by engine serial number and the correct Volvo Penta turbocharger or oil return diagram

Serial Number Notice: Fitment varies by engine family, turbo layout, and oil return routing. Always confirm part number 3593534 or its current replacement 23845356 against your engine serial number before ordering, especially on engines that have had prior turbo or oil-line service.

Superseded / Replaced By

Original part number 3593534 is discontinued and has been superseded by Volvo Penta 23845356. Use 23845356 as the current OEM ordering number. Both numbers refer to the same hose position in the turbocharger oil return assembly.

Related Parts

• Volvo Penta 23845356 – current superseding OEM hose (order this number)
• 21294908 – oil return pipe (adjacent assembly component)
• 21098797 – oil return pipe (adjacent assembly component)

Dimensions & Weight

Approximate weight: 0.023 kg. Exact hose length and diameter should be verified against the Volvo Penta turbocharger oil return assembly diagram for your specific engine serial number.

Kit Contents

Single hose (3593534 / 23845356). Sold individually. Hose clamps and adjacent oil return pipes are separate items.

When to Replace

Replace this hose when it shows oil seepage, heat hardening, cracking, swelling, clamp-area damage, or deterioration. It is also a smart replacement any time the surrounding turbocharger oil return assembly is opened, since short oil return hoses in this area are exposed to sustained heat and oil over time. Inspect the hose clamps at the same time to avoid repeat leaks after service.

Installation Notes

Confirm the exact diagram position before installation. The hose sits between adjacent oil return pipe components at position 16 in the turbocharger oil return assembly. Inspect the mating pipe ends and clamp seats before reassembly, and replace clamps if there is any sign of corrosion or deformation.

Technical FAQ

My parts lookup shows 3593534 as discontinued — what do I order?
Order 23845356. This is the current active Volvo Penta OEM number that supersedes 3593534. Both numbers refer to the same hose position in the turbocharger oil return assembly.

How do I confirm this hose fits my engine?
Use your engine serial number to locate the correct Volvo Penta turbocharger or oil return pipe diagram and confirm position 16 matches 3593534 or 23845356 for your specific engine build.

Parts Desk Insights

Short turbo oil return hoses are easy to overlook during service because they look simple once removed. The most common issue is trying to match a used, heat-hardened hose by length and diameter alone — the safer approach is to confirm the diagram position first, then cross to the current superseding number. Also worth noting: if this hose has been seeping, check the clamp seats on the adjacent pipes before reassembly. A new hose on a damaged pipe end will leak again quickly.