Oil pump gear, Lower, with tachometer drive. Porsche 356 B / 356 C › 61610701502

OE Match lower oil-pump gear incorporating a tachometer drive, intended for Porsche 356 B and 356 C applications. This replacement component suits the later, large-style pump assembly.

Fits

• Porsche 356 B — 356B 1959–63
• Porsche 356 C — 356C 1963–65

Fits late style "large" oil pump

Check fitment for your specific vehicle (model, year, engine) before ordering.

What This Product Does

This component combines the lower pump gear with the drive for the mechanical tachometer. Within the pump assembly, the gear works with its mating component to move engine oil through the lubrication system. It is an individual internal component, rather than a complete pump or gasket kit.

Functions

• Works with the mating gear to circulate engine oil.
• Provides the mechanical tachometer drive.
• Replaces the lower gear component during suitable pump repairs or engine rebuilding.

Technical Details

• Brand: OE Match.
• Position: Lower, with tachometer drive.
• Internal diagram designation: oil pump shaft II with oil pump gear.
• Referenced part number: 61610701502.
• Diagram application context: engine lubrication, 356B / 356C, 1960–1965.
• Listed engine applications and starting numbers: 1600, M 601 995 >>; 1600 S, M 85 941 >>; 1600 S90, M 800 150 >>.

Symptoms of Fault

Conditions warranting inspection include unusually low pressure when the engine is hot, delayed pressure build-up after starting, abnormal mechanical noise and metallic particles in the oil. These signs do not establish that this gear is faulty; pressure-sender faults, bearing wear and other lubrication-system problems can produce similar symptoms.

Why Replacement Matters

Renewing a gear with confirmed wear or damage addresses deterioration within the pump assembly. During dismantling, inspect the mating gear, housing and associated sealing components rather than assuming that replacing one part will resolve every pressure or leakage issue. OE Match focuses on Porsche-specific replacement applications; checking the pump version and engine number remains essential.

FAQs

Does low pressure automatically mean this gear needs replacing?
No. Verify actual oil pressure and investigate the cause before selecting replacement components.

Should seals be checked during pump work?
Yes. Inspect the relevant gaskets and seals during dismantling, and renew those required for correct reassembly.

What should be checked before choosing this component?
Confirm the later large-style pump, vehicle application and applicable engine-number cutoffs.