Sierra 18-7513

Keep your Volvo Penta engine running smoothly on the water with the reliable Sierra 18-7513 temperature sensor, a direct replacement for the OEM Volvo part number 3862500. Designed for marine environments, this sensor accurately monitors coolant or water temperature to alert you to potential overheating issues before they escalate into costly repairs. Boat owners trust Sierra parts for their durability against corrosion, vibration, and harsh saltwater exposure.

Key Features and Benefits

• Precision Monitoring: Delivers exact temperature readings to your engine's gauge or ECU, ensuring optimal performance and preventing damage from overheating.
• Marine-Grade Construction: Built with high-quality materials that resist corrosion from saltwater, humidity, and constant engine heat—ideal for outboard and inboard applications.
• Easy Direct Fit: Matches the original Volvo 3862500 specifications, including thread size, connector type, and resistance curve for plug-and-play installation.
• Long-Lasting Reliability: Sierra's rigorous testing means fewer breakdowns and more time enjoying your boating adventures.
• Cost-Effective Alternative: Provides OEM-level performance at a fraction of the dealer price, without sacrificing quality.

Compatibility with Volvo Penta Engines

This Sierra 18-7513 temp sensor fits a wide range of Volvo Penta models, particularly those with inline and V6 gasoline engines from the AQ and 270 series. It's commonly used in setups where precise temperature feedback is critical, such as in cooling systems with heat exchangers or raw water pumps. Always cross-reference your engine's service manual to confirm fitment, as variations exist across model years. Popular applications include sport boats, cruisers, and fishing vessels powered by Volvo Penta.

Signs Your Temperature Sensor Needs Replacement

Spotting a failing temp sensor early can save your engine. Watch for these common symptoms:

• Erratic or pegged temperature gauge readings.
• Engine overheating warnings without actual high temps.
• No temperature display at all on the dash.
• Check engine light triggered by false temp signals.
• Fluctuating idle or poor performance under load.

Replacing with the Sierra 18-7513 restores accurate monitoring and peace of mind on every outing.

Simple Installation Steps

Swapping out your old sensor is a straightforward DIY job that takes under 30 minutes with basic tools:

1. Shut off the engine, let it cool completely, and relieve system pressure.
2. Disconnect the wiring harness from the sensor.
3. Use a deep socket or wrench to unscrew the old sensor from the cylinder head or thermostat housing.
4. Apply marine-grade thread sealant to the new Sierra 18-7513 and thread it in by hand, then torque to spec (typically 15-20 ft-lbs).
5. Reconnect the harness, top off coolant if needed, and test run the engine.

Pro tip: Inspect the wiring and connector for corrosion while you're in there—clean with electrical contact cleaner for best results.

Why Boaters Choose Sierra Engine Parts

Sierra has earned a stellar reputation among marine mechanics and DIY enthusiasts for producing aftermarket parts that exceed expectations. Unlike generic imports, Sierra components undergo extensive real-world testing in salty, high-vibration conditions. The 18-7513 isn't just a clone—it's engineered to outperform in demanding boating scenarios, from coastal cruising to offshore fishing.

Maintenance Tips for Peak Performance

To maximize the lifespan of your temp sensor:

• Flush your cooling system annually with fresh water and a marine flush kit.
• Check sensor wiring during routine engine services.
• Use a proper coolant mix to prevent mineral buildup around the sensor tip.
• Monitor for air pockets in the cooling system, which can cause false readings.

Frequently Asked Questions