Crusader Oil Cooler Hose Assembly 6.5"–10" | OEM Part RA045103D
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Crusader Oil Cooler Hose Assembly 6.5"–10" — OEM Part RA045103D
Genuine Crusader OEM oil cooler hose assembly for compatible Crusader marine inboard engines. This hose assembly connects the engine to the oil cooler, routing engine oil through the cooler to maintain proper oil temperature under load. The assembly is sized at 6.5"–10" and is the correct OEM replacement for compatible Crusader oil cooling system configurations.
Part Information
- Part Number: RA045103D
- Brand: Crusader
- Official Product Type: Oil Cooler Hose Assembly
- Length Range: 6.5"–10"
- System: Engine Lubrication — Oil Cooling Circuit
Compatible Applications
- Compatible Crusader marine inboard engines where the parts diagram specifies oil cooler hose assembly RA045103D
- Always confirm fitment by engine model, serial number, and parts diagram before ordering — oil cooler hose specifications vary by engine family and oil cooler configuration
- For related oil line hose assemblies, see Crusader Oil Line Hose 6.0L — RA045155 and Crusader Oil Line Hose 5.7L/6.0L — RA045155A
Serial Number & Fitment Notice
Confirm fitment using your Crusader engine serial number and the corresponding parts diagram. Oil cooler hose specifications vary by engine family and oil cooler configuration. Do not assume fitment based on hose length alone.
When to Replace
- Visible cracking, swelling, or deterioration of the hose body
- Oil leaks at the hose connections or along the hose body
- Hose is soft, spongy, or collapsing under pressure
- Hose end fittings are corroded, damaged, or leaking
- Preventative replacement during oil cooler service on high-hour engines
Service Interval
- Inspect annually for cracking, swelling, softness, and oil leaks
- Replace immediately if leaks, cracking, or deterioration are found
- Replace during oil cooler replacement or any service that requires disconnecting the oil cooler hose circuit
Installation Notes
- Inspect the oil cooler and engine fittings for corrosion or damage before installing the new hose assembly
- Ensure hose end connections are fully seated and clamps or fittings are torqued to the specification in the Crusader service manual
- Check for oil leaks at all connections after the engine reaches operating temperature
Technical FAQ
What is the difference between RA045103D and RA045155 / RA045155A?
RA045103D is the oil cooler hose assembly (6.5"–10") connecting the engine to the oil cooler. RA045155 and RA045155A are oil line hose assemblies for 6.0L and 5.7L/6.0L engines respectively. These are different hose assemblies for different positions in the oil cooling circuit. Confirm the correct part number for your specific application using the engine parts diagram.
Parts Desk Insights
Best Use Case: RA045103D is the correct OEM replacement for Crusader inboard owners replacing a deteriorated or leaking oil cooler hose assembly. It is particularly well-suited for high-hour engines where rubber hose assemblies are being replaced as part of a preventative maintenance program, or during oil cooler replacement where the existing hose is found to be in poor condition.
Common Customer Issue: The most frequent issue is confusing the oil cooler hose assembly with the oil line hose assemblies (RA045155 / RA045155A). These are different components in different positions in the oil cooling circuit. Always confirm the correct part number using the engine parts diagram before ordering.
Related Products
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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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.
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