PCM Thermostat 170°F Closed Cooling – R026007
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The PCM R026007 Thermostat is a genuine OEM 170°F thermostat designed specifically for fresh water cooled (closed cooling) PCM and Crusader marine engines.
This thermostat is installed in the heat exchanger housing, where it regulates coolant flow between the engine and the closed cooling system. The 170°F temperature rating is critical for modern PCM engines, ensuring proper combustion efficiency, fuel control, and engine longevity.
Unlike raw water thermostats, this unit is calibrated for closed cooling systems, allowing the engine to run at a higher, more controlled operating temperature. The design includes a bleed hole / bypass feature to help eliminate trapped air and stabilize temperature during warm-up.
This is a direct OEM replacement part, engineered for precise fit and consistent thermal performance under marine load conditions.
Key Features
- Genuine PCM / Pleasurecraft Marine OEM thermostat
- 170°F (77°C) temperature rating
- Designed for fresh water cooled (closed cooling) systems
- Integrated bleed hole for air purge and temperature stability
- Maintains proper engine operating temperature
- Prevents overheating and cold-running conditions
- Direct OEM replacement
Engine Compatibility
PCM GM-Based Engines (Closed Cooling Systems)
Commonly used on:
- 5.0L (GM 305)
- 5.7L (GM 350)
- 6.0L (GM LS-based / Crusader platforms)
➡️ Fits:
- 2004+ PCM engines with serpentine belt systems
- PCM / Crusader engines equipped with factory fresh water cooling (FWC)
Crusader Engine Compatibility
- TB350XL / TB350HT
- MP5.0 / MP5.7
- 5.7 Classic Series (1999–2005 FWC)
- MP7.4 / MP454XLI
- TB454XL (serial-dependent)
Cross-Platform Compatibility
- Marine Power engines (515411)
- Crusader OEM systems
- PCM closed cooling systems
Serial Number Fitment Notice
Fitment depends on:
- Cooling system type (must be closed cooling / FWC)
- Engine model and year
- Heat exchanger configuration
⚠️ Always confirm compatibility using your engine serial number before ordering.
Specifications
- Part Number: R026007
- Temperature Rating: 170°F (77°C)
- Cooling System: Fresh water / closed cooling
- Location: Heat exchanger housing
- Design: Wax-element thermostat with bleed hole
- Installation: Hose-retained (typically no gasket required)
What’s Included
- Thermostat (no gasket required in most applications)
When This Part Needs Replacement
- Engine running too cold or not reaching temp
- Engine overheating in closed cooling system
- Fluctuating temperature readings
- Air trapped in cooling system
- Routine maintenance on FWC systems
Installation Notes
- Install in heat exchanger housing
- Ensure correct orientation (spring toward engine)
- Verify hose retention is secure
- Bleed cooling system after installation
- Confirm stable operating temperature
Alternate / Superseded Part Numbers
OEM Cross References
- PCM: R026007
- Replaces: R026007A
- Crusader: 98203
- Marine Power: 0500-007 / 515411
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
💡 Parts Desk Insight
This is a closed cooling thermostat only—if you install this in a raw water system, the engine will run too hot. Always match thermostat temp to cooling type 👍
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
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.