Volvo Penta Oil Cooler – OEM Part 21657814
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Volvo Penta Oil Cooler – OEM Part 21657814
Part Number: 21657814
Brand: Volvo Penta
System: Engine Oil Cooling / Thermal Management
Engine Family: Volvo Penta diesel inboard engines (confirm by serial number)
This is the genuine OEM oil cooler for select Volvo Penta marine diesel engines. The oil cooler transfers heat from engine oil into the raw water cooling circuit, keeping oil temperatures within operating range and protecting the engine under sustained load. At $1,399, this is a high-value component — always confirm fitment by engine model and serial number before ordering.
Compatible Applications
- Volvo Penta diesel inboard engines — specific models confirmed by serial number
- Verify fitment using your engine model designation and serial number on the engine block ID plate
- Cross-reference against the Volvo Penta parts diagram for your engine before ordering
Technical Specifications
- Part Number: 21657814
- Type: Engine oil cooler (heat exchanger)
- System: Oil cooling / thermal management
- Construction: OEM marine-grade
- Weight: Approx. 6 kg (estimated)
Parts Desk Insights
This oil cooler is most commonly ordered during a major engine overhaul or after a cooling system failure that allowed oil temperatures to spike. It’s also replaced when the cooler develops an internal leak — which can allow raw water to contaminate the engine oil or oil to enter the cooling circuit. Either condition requires immediate attention. Because this is a high-value part, we strongly recommend confirming your engine serial number and cross-referencing the parts diagram before placing your order. Incorrect fitment returns on large cooling components are costly and time-consuming.
Service Interval
Inspect during major engine service intervals. Replace immediately if internal leakage is suspected (milky oil, coolant loss without external leak, or overheating under load). Proactive replacement is recommended during full engine overhauls on high-hour engines.
Signs This Part Needs Replacement
- Milky or contaminated engine oil (water intrusion)
- Unexplained coolant loss without visible external leak
- Engine overheating under sustained load
- Oil in the cooling circuit
- Scheduled engine overhaul on high-hour diesel
Technical FAQ
Q: How do I know if my oil cooler has failed?
The most common signs are milky engine oil (indicating water contamination) or unexplained coolant loss. Either symptom warrants immediate investigation before further engine operation.
Q: Can I confirm fitment without a parts diagram?
We recommend using your engine serial number and the official Volvo Penta parts diagram for your engine family. If you need help confirming fitment, contact us before ordering — this is a high-value part and incorrect orders are costly.
Q: Are there O-rings or seals included?
This listing is for the oil cooler assembly only. O-rings and seals should be replaced at the same time — see related parts below.
Related Parts
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.