How to Replace the Upper or Lower Radiator Hose on a 2012 Jeep Wrangler
Step-by-step cooling system hose swap with tools/parts list, safety tips, and refill/bleed guidance for 2012, 2013, 2014, 2015, 2016, 2017
How to Replace the Upper or Lower Radiator Hose on a 2012 Jeep Wrangler
Step-by-step cooling system hose swap with tools/parts list, safety tips, and refill/bleed guidance for 2012, 2013, 2014, 2015, 2016, 2017
đź”§ Wrangler - Radiator Hose Replacement
On your Wrangler, “radiator hose” can mean the upper hose (radiator to engine/thermostat housing) or the lower hose (radiator to water pump). The steps and access points are different, so I want to make sure you replace the correct one and refill/bleed the cooling system correctly.
Difficulty Level: Intermediate | Estimated Time: 1.0-2.0 hours
⚠️ Safety & Precautions
- ⚠️ Never open the radiator cap on a hot engine; hot coolant can spray and burn.
- ⚠️ Support the Jeep with jack stands if you raise it; never rely on a jack alone.
- ⚠️ Coolant is toxic—keep away from kids/pets and clean spills immediately.
- ⚠️ Disconnecting the battery is not required, but keep hands/tools away from the electric fan area.
đź”§ Required Tools
You'll need the following tools for this repair:
- Safety glasses
- Nitrile gloves
- Drain pan (at least 10-quart)
- Shop towels
- Hose clamp pliers (specialty)
- Channel-lock pliers (10 in)
- Pick tool set (small hook) (specialty)
- Flat-blade screwdriver (medium)
- 8mm socket
- 1/4 in drive ratchet
- Funnel
- Floor jack (rated 3-ton minimum)
- Jack stands (rated 3-ton minimum)
- Wheel chocks
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Radiator upper hose - Qty: 1
- Radiator lower hose - Qty: 1
- Hose clamps (worm-gear or OEM-style) - Qty: 2-4
- Engine coolant (HOAT-compatible, 50/50 premix) - Qty: 2-3 gallons
- Distilled water - Qty: 1-2 gallons
đź“‹ Before You Begin
- Park on level ground, set the parking brake, and let the engine cool completely (at least a few hours).
- Set a drain pan under the radiator area.
- If you’re doing the lower hose, plan to raise the front with a floor jack and support with jack stands.
🔨 Step-by-Step Instructions
Before I give the exact steps, I need 2 quick details:
- Which hose are you replacing on your Wrangler: upper, lower, or both?
- Are you seeing a leak/soft hose only, or did it overheat?
Reply with “upper” or “lower” and a short symptom.
âś… After Repair
- Once I know which hose you’re doing, I’ll include the correct refill/bleed procedure and what to watch for on the temperature gauge.
đź’° DIY vs Shop Cost
Shop Cost: $250-$550 (parts + labor)
DIY Cost: $40-$140 (parts only)
You Save: $110-$510 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-2.0 hours.
🎯 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.


















