Skip to product information
SKU:
NLT2T01911
Ships for free in 2–4 business days.
Water Pump 129004-42001 for Yanmar 4TNV84 4TNV88 Engines
$121.09
In Stock
$121.09
Sale price
$121.09
Regular price
This replacement water pump is intended for select Yanmar 4TNV84 and 4TNV88 diesel engines using part number #129004-42001. It circulates coolant between the engine and radiator.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Yanmar 4TNV84
- Yanmar 4TNV88
Product Overview
A leaking shaft seal, rough bearing or failed impeller can reduce coolant circulation and increase engine temperatures. Inspect the pulley drive, thermostat and cooling hoses when replacing the pump.
Coolant leak, noisy shaft bearings, overheating from pump failure. Compare pump casting, impeller depth, pulley, bolt pattern and engine serial; cross-listed numbers can differ by configuration.
Key Features & Performance
- Diesel engine coolant pump; references require housing confirmation
- Primary part identification: 129004-42001, 129508-42001, 129508-42004
- Application: Yanmar 4TNV84; Yanmar 4TNV88
- Common service situations: coolant leak, noisy shaft bearings, overheating from pump failure
Replaces / Cross-References
- 129004-42001
- 129508-42001
- 129508-42004
What Is Included
Includes one water pump 129004-42001.
Fitment Notes
Compare pump casting, impeller depth, pulley, bolt pattern and engine serial; cross-listed numbers can differ by configuration.
Frequently Asked Questions
Is this a genuine OEM part?
No. This listing describes a replacement part unless the product is explicitly identified as genuine OEM. Brand and part numbers identify intended applications.
What should I check before ordering?
Compare pump casting, impeller depth, pulley, bolt pattern and engine serial; cross-listed numbers can differ by configuration.
Will this part fix every related symptom?
Not necessarily. Several different faults can cause similar symptoms, so test the affected system and compare the original component first.
Part Summary
Keywords: Water Pump 129004-42001, Yanmar 4TNV84, Yanmar 4TNV88, 129004-42001, 129508-42001, 129508-42004, water pumps.
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.