ACE AUTOMOBILES

Polo Oil Cooler

Volkswagen Polo – Oil Cooler (Engine Cooling System Details) The oil cooler in a VW Polo is a small heat exchanger that helps regulate engine-oil temperature so the engine stays protected and lubricated. 🔧 1. Function of the Oil Cooler The oil cooler: Keeps engine oil at an optimal temperature (90–110°C) Prevents oil breakdown during high RPM or long drives Improves lubrication under heat Reduces wear on pistons, crankshaft, turbo, and valve train Maintains engine performance and fuel efficiency Depending on the Polo variant and engine, the oil cooler may be: Water-to-oil type (most common on Polo 1.2 / 1.6 / 1.5 TDI) Air-to-oil type (rare; usually aftermarket) 📍 2. Location of the Oil Cooler For most Polo petrol and diesel engines: It sits between the oil filter and the engine block It’s shaped like a compact aluminum unit Coolant hoses run into the cooler to exchange heat with oil You’ll see the oil filter screwed into it. 🛠 3. Oil Cooler in Different Polo Engines 🔸 Polo 1.2 MPI (Petrol) Uses a water-to-oil cooler Mounted directly on the oil filter housing Part Number (commonly used): 03F 117 021 B 🔸 Polo 1.2 TSI Larger cooler to handle higher turbo temperatures Typically uses: 04E 117 021 B 🔸 Polo 1.5 TDI / 1.6 TDI Heavy-duty diesel cooler Part Number (commonly seen): 03L 117 021 C Diesel engines generate more heat → cooler is critical for turbo health 🔸 Polo GT TSI (EA111 / EA211) More efficient cooler designed for turbo engines Prevents oil coking in turbo line ⚠️ 4. Common Oil Cooler Problems in VW Polo 1. Oil mixing with coolant Milky coolant or oil in coolant reservoir Usually caused by a damaged internal oil-cooler seal Cheaper to fix than a head-gasket 2. External coolant leakage Coolant drips near oil filter housing Often due to cracked aluminum cooler or aging plastic connectors 3. Overheating engine oil Loss of cooling efficiency Can lead to turbo wear (in TSI/TDI) 4. Faulty cooler gasket Oil leak around the cooler base Solved by replacing the gasket (~₹200–₹500) 🧰 5. Replacement Cost (India Estimate) Oil cooler price: ₹2,500 – ₹9,000 (depending on model) Gasket/seal: ₹200 – ₹600 Labour: ₹800 – ₹1,800 Coolant refill: ₹500 – ₹900 Total: ₹3,500 – ₹12,000

₹ 1,250/PiecePiece

Duster Oil Cooler

Renault Duster – Oil Cooler (Engine Oil Heat Exchanger) The oil cooler in the Duster is a water-to-oil heat exchanger . It keeps engine oil at the correct temperature by using engine coolant to absorb excess heat from the oil. ⭐ 1. Function of the Oil Cooler The oil cooler: Maintains optimal oil temperature (~90–110°C) Protects engine components (crankshaft, pistons, turbo) Prevents oil thinning at high temperature Ensures stable lubrication during long drives, climbs, or towing Extends turbocharger life (very important in Duster diesel engines) 📍 2. Location For all Duster diesel engines (K9K 1.5 dCi): The oil cooler is mounted on the engine block near the oil filter housing . The oil filter screws directly onto the cooler . Two coolant hoses connect to the cooler to exchange heat. You’ll see it just below the EGR pipe / intake duct area. 🔧 3. Oil Cooler Types by Duster Engine Variant ✔️ Duster 1.5 dCi (85 PS – 5-speed K9K 85) ✔️ Duster 1.5 dCi (110 PS – 6-speed K9K 110) Common part numbers: (Same design but sometimes paired with different gasket kits.) ✔️ Duster Petrol (1.6/1.5) Some models use a smaller oil cooler or only an oil filter housing without a cooler. Part numbers vary based on engine code H4M / K4M . ⚠️ 4. Common Oil Cooler Problems in Duster 1. Oil mixing with coolant Milky coolant Oil film inside coolant tank Caused by internal cooler failure (heat exchanger crack) 2. Coolant leaking near the oil filter area Usually from cracked cooler body or failing hose connectors 3. External oil leakage Typically from worn oil-cooler gasket (very common in K9K engines) 4. Overheating of engine or turbo Due to inefficient cooling if cooler is partially clogged 🛠 5. Parts Needed During Replacement Oil cooler Cooler-to-block gasket (critical!) Coolant hoses if brittle Fresh engine coolant Engine oil + oil filter (recommended) Gasket part number commonly used: 💰 6. Replacement Cost (India Estimate) Oil cooler price: OEM Renault: ₹3,500 – ₹7,000 Aftermarket (Valeo / Hella / Mahle): ₹2,200 – ₹4,500 Labour: ₹800 – ₹1,500 Coolant refill: ₹500 – ₹900 Total estimated cost: 👉 ₹4,000 – ₹9,500 🔍 7. Symptoms You Should Check If you observe any of these, the oil cooler may be faulty: Coolant loss with no visible leak Oil mixing with coolant Coolant leak near the oil filter area Engine overheating Turbo whine or reduced performance (oil overheating) 📘 Want exact part number for your Duster? Tell me: Model year Engine: 85 PS or 110 PS Diesel or petrol I’ll give you the exact, correct oil cooler part number and compatible replacement options.

₹ 1,850/PiecePiece