🔧 Seltos - Thermostat Replacement

On your Seltos, the thermostat controls coolant flow to keep engine temperature stable. Replacing it typically means draining some coolant, removing the thermostat housing, installing a new thermostat/seal, then refilling and bleeding air from the cooling system.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours

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⚠️ Safety & Precautions

• ⚠️ Never open the coolant reservoir or radiator cap hot; wait until fully cool.
• ⚠️ Coolant is toxic; keep away from kids/pets and clean spills immediately.
• ⚠️ Support the vehicle with jack stands if you lift it; never rely on a jack.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Drain pan (at least 10-quart)
• Funnel
• Shop towels
• Trim clip remover
• Ratchet (3/8" drive)
• Socket set (8mm, 10mm, 12mm)
• Extension set (3" and 6")
• Torque wrench (5–60 Nm range)
• Hose clamp pliers
• Picks set
• Plastic gasket scraper

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Engine thermostat - Qty: 1
• Thermostat housing gasket/O-ring - Qty: 1
• Engine coolant (Hyundai/Kia compatible, pre-mixed) - Qty: 1-2 gallons
• Hose clamp(s) - Qty: 1-2

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📋 Before You Begin

• Park on level ground, set the parking brake, and let the engine cool completely (at least 2 hours).
• If you lift the front, place wheel chocks behind the rear wheels.
• Keep your drain pan ready; coolant will spill when hoses are removed.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Before I give the exact thermostat location and bolt torque specs, I need one quick detail.

• Are we working on your Seltos with the 1.6L turbo (usually 7-speed DCT) or the 2.0L non-turbo?
• If you’re not sure, tell me what your engine cover says (for example “T-GDI” or not).

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✅ After Repair

• Once you confirm the engine, I’ll include the correct bleed procedure to prevent overheating.

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 (parts + labor)

DIY Cost: $60-$180 (parts only)

You Save: $270-$790 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-3.0 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.