Catalog

RENAULT S.A. 7701048307 PUMP ASSY WATER

Product Specifications

Product quality
OEM Equivalent Grade
starstarstar
Wholesale price USD $2.27
Wholesale price CNY ¥15.6
bolt MOQ (Minimal order)
500 pcs
local_shipping Production time
30-35 days
package_2 Shipping Weight: 0.104 kg
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RENAULT S.A. 7701048307
RENAULT S.A. 7700821782
Overview & Operating Principle
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The PUMP ASSY WATER is a centrifugal pump that circulates coolant continuously through the engine block, cylinder head, radiator, heater matrix, and ancillary cooling circuits, maintaining the bulk coolant flow rate required for the radiator to reject combustion heat and stabilise engine operating temperature within its design range. The pump consists of a cast aluminium or composite housing bolted to the engine block, an impeller — cast aluminium, stamped steel, or reinforced polymer — that accelerates coolant radially outward by centrifugal force as it rotates, a shaft supported on a sealed bearing assembly, and a mechanical face seal or lip seal that prevents coolant from migrating along the shaft into the bearing. On belt-driven engines the pulley is pressed or bolted onto the pump shaft and is driven by the accessory belt or, on engines where the water pump is located within the timing belt cover, directly by the timing belt at a fixed ratio to crankshaft speed. On newer engines an electric water pump driven independently of engine speed allows the ECU to control coolant flow rate precisely as a function of thermal load rather than engine RPM.

This unit — RENAULT S.A. 7701048307 — is manufactured to OEM-equivalent specifications: impeller diameter and blade geometry, housing port sizes and bolt pattern, shaft bearing dynamic load rating and seal type, pulley bolt circle diameter and belt profile where applicable, and on electric pumps, motor voltage, rated flow rate, and connector pinout are matched to the original part. Supplied as a direct replacement for standard fitment. Available wholesale from 2.27 USD, MOQ 500 pcs, production lead time 30-35 days.

Water pumps fail through shaft bearing failure producing noise and eventual shaft wobble that destroys the face seal, mechanical face seal fatigue allowing coolant to weep from the shaft vent hole below the pump, impeller erosion or detachment on polymer impeller designs from cavitation and coolant acidity, and housing corrosion perforation in neglected cooling systems with low pH coolant. A weeping pump shaft vent hole indicates imminent bearing failure — the vent hole exists specifically to allow early coolant seepage to be detected before the bearing is damaged; this symptom means replacement is due within the current service interval and should not be deferred.

Symptoms & Diagnostics
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Coolant weeping or dried mineral deposit visible at the shaft vent hole on the underside of the pump body — the mechanical face seal has begun to leak; the vent hole discharges to atmosphere to prevent coolant from contaminating the shaft bearing; this is the earliest and most reliable indicator of impending pump failure.
Rumbling, growling, or whining noise from the front of the engine that increases with RPM and changes in character when the engine is cold versus warm — the shaft bearing has lost its grease film; confirm by gripping the pump pulley and checking for radial play or rough rotation with the belt removed.
Engine overheating under normal operating conditions with no external coolant leak visible — the impeller has separated from the shaft, spun freely without pumping, or has eroded to the point where flow rate is insufficient; remove the thermostat and check for flow from the pump outlet to distinguish pump failure from thermostat failure.
Coolant loss combined with oil contamination — coolant in the oil or oil in the coolant expansion tank — a failed pump housing gasket or a cracked housing has allowed coolant to enter an oil gallery; this fault requires immediate engine shutdown to prevent bearing damage from diluted oil.
Accessory belt squeal or squeaking at idle that clears at higher RPM on a belt-driven pump — shaft bearing wear has caused pulley misalignment relative to the belt run, increasing belt slip; inspect the pulley for wobble or axial movement before assuming the belt is at fault.
Check Engine light with electric water pump fault codes or coolant temperature above target despite a functional thermostat — the electric pump motor has failed or the pump controller has lost communication with the ECU; verify pump operation by commanding it via scan tool live data before replacing the thermostat or radiator.
Logistics & Customs
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International HS Code
8413.30
EAEU Customs Code (TN VED)
8413 30 200 0
Typical Net Weight
0.104 kg
Country of Manufacture
China
Standard MOQ
500 pcs
Production Lead Time
30-35 days
Always verify the exact 8-digit or 10-digit subheading with your customs broker for the destination country, as tariff schedules and duty rates vary by jurisdiction.
Installation Tips
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  1. Allow the engine to cool fully and drain the cooling system completely before removing the water pump — on timing belt-driven pumps, the timing belt and all associated covers must be removed first, requiring the engine to be set to TDC and all timing locking tools to be fitted before any belt tension is released. Never attempt to replace a timing belt-driven water pump without also replacing the timing belt and tensioner at the same service.
  2. Clean the pump mating face on the engine block thoroughly after removing the old pump — use a gasket scraper and finishing with a flat file or fine abrasive paper to remove all traces of the old gasket or sealant. Any residual material will prevent the new pump gasket from sealing evenly and will cause an immediate coolant leak on startup. Wipe the face clean with a dry cloth before fitting the new gasket.
  3. Inspect the pump housing recess and all coolant passages in the block face for scale buildup or corrosion pitting — heavy scale in the passages adjacent to the pump inlet indicates the coolant has not been renewed at the correct interval and the new pump will be operating in a degraded chemical environment; flush the system thoroughly before refilling with fresh coolant of the correct specification.
  4. Fit the new pump gasket dry or with the sealant type specified by the OEM — most modern water pump gaskets are pre-formed rubber or composite elements that seal dry without additional sealant; applying RTV silicone to a dry-seal gasket traps the sealant inside the cooling circuit where it can block the thermostat, heater matrix, or pump inlet. Use sealant only where the OEM service procedure specifically requires it.
  5. Torque all pump mounting bolts evenly in a diagonal sequence to the OEM specification — water pump bolts thread into aluminium block material and are easily stripped by overtightening; work up to the final torque value in two passes and never use an impact driver for final tightening. On timing belt-driven pumps, refit the timing belt with a new tensioner and idler, reset timing, and torque all timing components before refilling the cooling system.
  6. Install the new PUMP ASSY WATER (RENAULT S.A. 7701048307), refill with the correct coolant specification and concentration, bleed all air from the system with the heater on maximum temperature, start the engine and check immediately for leaks at the pump face and all disturbed hose connections, run to full operating temperature, re-check coolant level after the thermostat opens, and verify temperature stabilises at the normal operating position before returning the vehicle to service.
Tools: engine timing lock tool set for timing belt-driven pumps, torque wrench, gasket scraper, flat file, cooling system pressure tester, coolant drain container, refractometer for coolant concentration check, OBD-II scanner for electric pump command.
Frequently Asked Questions
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Should the timing belt always be replaced at the same time as the water pump on timing belt-driven engines?
Yes, without exception. On engines where the water pump is driven by the timing belt, both components share the same replacement interval — typically 60,000–120,000 km or 5–10 years depending on the engine — and the timing belt must be fully removed to access the pump. Replacing the pump without renewing the belt, tensioner, and idler wastes the full labour cost of the disassembly and leaves a timing belt of unknown remaining life on the engine. A timing belt failure on an interference engine causes catastrophic valve-to-piston contact; the combined kit cost is a small fraction of the engine repair cost that results from a belt failure. ok.parts supplies water pumps individually and as part of timing kit sets at wholesale MOQ from 2.27 USD per unit.
Is ECU adaptation or relearning required after replacing an electric water pump?
On most vehicles with electric water pumps the ECU recognises the replacement pump automatically after fault codes are cleared and the system resumes normal closed-loop temperature management. However, on certain BMW, Mercedes-Benz, and Audi applications with fully variable electric cooling systems, a cooling system bleeding and adaptation procedure via a manufacturer-specific scan tool is required to prime the pump, purge air from the circuit, and reset the ECU's thermal model calibration. Always clear fault codes, command the pump via scan tool live data to confirm it responds, and perform a full warm-up cycle with temperature monitoring before confirming the repair is complete.
How does the OEM-equivalent aftermarket unit compare to the genuine OEM part?
OEM-equivalent units in this catalogue replicate the current OEM design geometry and material specification. Quality is verified against OEM cross-reference data. When ordering in bulk, confirm with our team that the specification matches the latest OEM revision for your application.
Is white-label or custom packaging available for wholesale orders?
Yes. ok.parts works directly with the manufacturing facility and can accommodate neutral white-label packaging or fully branded packaging with your company logo, part numbers, and barcode. Minimum order quantities and lead times for custom packaging may differ from standard stock. Contact the team via the inquiry form to discuss your specific requirements.
Frequently Replaced Together
PartReason for Combined Replacement
Timing Belt Kit
Belt, tensioner, idler — timing belt-driven pumps only		The timing belt, tensioner, and idler are removed to access the water pump on timing belt-driven engines and share the same replacement interval. Replacing all components simultaneously during a single disassembly is the correct procedure — returning a used timing belt to service after the pump has been replaced leaves an unknown-life component on the engine and wastes the full labour cost of the disassembly if the belt subsequently fails.
Thermostat and Gasket
OEM ref. varies by engine		The thermostat governs coolant flow through the radiator circuit and is the primary companion component to the water pump in the cooling system. On many engines the thermostat housing is disturbed during pump access. A thermostat at or near its service life that has lost precise opening temperature calibration will cause the same overheating symptoms as a failed pump — replacing both simultaneously eliminates thermostat behaviour as a diagnostic variable and completes a full cooling system service in one visit.
Coolant (Engine Antifreeze)
OAT or HOAT per OEM specification		The cooling system must be fully drained for water pump replacement, making this the mandatory time to renew the coolant regardless of when it was last changed. Degraded coolant with depleted corrosion inhibitors and elevated acidity is the primary cause of impeller erosion, housing corrosion, and seal failure on new pumps. Refilling a new pump with old coolant significantly reduces its service life — always refill with fresh coolant of the correct OEM-specified type and concentration.