1958-1964 Chevrolet Impala Windshield Washer Pump Replacement Guide
Restore clear vision in your classic Impala by understanding how to diagnose and replace its unique washer pump.
- The 1958-1964 Impala uses a vacuum-operated washer pump, not an electric one.
- Failure is almost always due to the internal rubber diaphragm drying out and cracking over time.
- A new aftermarket Trico pump is a reliable and affordable replacement that mimics the original's function.
- Replacement is a simple, DIY-friendly task that requires basic tools and less than an hour.
Symptoms of a Failing Windshield Washer Pump
A faulty washer pump on a classic Impala can be more than an inconvenience; it can be a safety issue. Because these pumps rely on a rubber diaphragm that can dry out and crack over 60+ years, failure is common. Watch for these signs:
- No Fluid Spray: The most obvious symptom. When you activate the washer, nothing comes out, but you can confirm the reservoir is full and the nozzles aren't clogged.
- Weak or Pulsing Spray: If the internal diaphragm has a small leak or has become stiff, it may not create enough suction to deliver a strong, steady stream of fluid.
- Vacuum Leak: A cracked diaphragm can create a vacuum leak. You might notice a slight change in engine idle speed or hear a faint hissing sound from the pump area when the engine is running.
Choosing the Right Aftermarket Pump
For a vehicle of this vintage, finding a New Old Stock (NOS) OEM pump is nearly impossible and often very expensive. Used original pumps are a gamble, as their internal rubber parts are likely in poor condition. A new aftermarket pump is the most reliable and cost-effective solution.
Trico: Trico was a major original equipment manufacturer for wiper and washer systems for General Motors during this era. An aftermarket Trico pump is often a direct reproduction of the original design, ensuring proper fit and function. These pumps are designed for easy installation without needing special modifications. For a classic Impala, a new Trico pump provides the reliability of modern manufacturing while maintaining the original operational design.
Cost of New Aftermarket Windshield Washer Pumps
| Brand | Price Range |
|---|---|
| Trico | $24.64 |
Frequently Asked Questions (FAQ)
Is the 1958-1964 Impala washer pump electric?
No, these vehicles originally came with a vacuum-operated washer pump that is part of the wiper motor assembly or mounted nearby. It uses engine vacuum, not electricity, to pump the fluid. Some owners choose to retrofit a universal electric pump, but direct-fit aftermarket pumps retain the original design.
How do I test my old washer pump?
You can test the pump by checking for vacuum at the inlet port with the engine running and the washer activated. You can also manually apply vacuum with a hand pump to see if it draws fluid. Often, the simplest diagnostic is to replace the pump, as the internal diaphragm is a common failure point due to age.
Is this a difficult part to replace myself?
No, this is a very DIY-friendly job. Replacement typically involves disconnecting two or three vacuum/fluid hoses and one or two mounting screws. Access is generally straightforward on the firewall. The entire process can usually be completed in under an hour with basic hand tools.
Are there any recalls for the windshield washer system?
No, there are no NHTSA recalls or Technical Service Bulletins (TSBs) for the windshield washer pump on the 1958-1964 Chevrolet Impala. Component failure is due to normal aging and wear, not a manufacturing defect.
Technical Specifications
Vacuum-Operated Diaphragm Pump
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.