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Citroën 1.6THP Turbo Oil Return Line Kit | C4 C5 DS3 DS4 DS5

Citroën 1.6THP Turbo Oil Return Line Kit | C4 C5 DS3 DS4 DS5

Regular price $114.35 USD
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Technical Description

Restore the mechanical integrity and stop the "Seepage Mess" in your Citroën. The factory oil drain hose on the 1.6THP engine (OE #037979) is a notorious source of persistent oil leaks. Over years of intense heat soak, the original rubber loses its elasticity and hardens. This triggers the "rotation leak" phenomenon—where the hose rotates on its fittings and seeps oil onto the engine block. This GryphonTek Signature Series Kit is the professional upgrade, replacing brittle rubber and crimped joints with High-Temp Silicone and Billet Aluminum.

  • Eliminate Rotation Leaks: Our kit targets the specific failure mode of the EP6 crimped drain. The combination of high-torque clamps and multi-layer silicone ensures a permanent, non-slip seal that handles engine vibration.
  • 6061-T6 Billet Fitting: Replaces the fragile factory connections with a precision-machined aircraft-grade aluminum fitting. Engineered to provide a perfectly flat, leak-free mounting surface at the turbo junction.
  • Dual-Barrier Heat Shielding: Features a high-temp silicone core paired with an Aluminum Foil Corrugated Protective Sleeve. This creates a critical thermal barrier against the extreme radiant heat of the 1.6THP turbo pocket.
  • Viton Sealing Tech: Includes a high-spec Viton O-ring designed to withstand modern synthetic oils and extreme temperatures without becoming brittle like standard factory rubber.

Specifications & Data

Vehicle Compatibility +

• Make: Citroën
• Engine: 1.6THP (EP6DT, EP6CDT, EP6CDTX, EP6DTS)
• Models: C4, C4 Picasso, C5, DS3, DS3 Racing, DS4, DS5

Kit Included +

• Custom High-Temp Silicone Oil Drain Hose
• 6061-T6 Billet Aluminum Drain Fitting
• High-Temp Viton O-Ring
• Aluminum Foil Corrugated Protective Sleeve
• High-Tensile Class 8.8 Bolt & Clamp Set

Product Specifications +

• OE Reference: Direct replacement for OE #037979 / 0379.79
• Turbo Fitment: Optimized for K03 (Stock) and K04 Upgrade
• Fitting Material: 6061-T6 Aircraft-Grade Aluminum
• Hose Material: Reinforced High-Temp Silicone Polymers
• Benefit: Prevents crimp-rotation leaks and stops oil seepage onto engine block

Installation: 100% Bolt-on; direct replacement for aging factory rubber

Why Upgrade / Why Choose +

The Citroën "Prince" engine runs extremely hot in the cramped engine bays of the DS3 and C5. This heat eventually "cooks" the factory rubber drain hose (OE #037979), turning it into a hard, plastic-like tube. Once the rubber hardens, it can no longer absorb engine harmonics, leading to hairline cracks and seepage that often gets misdiagnosed as an expensive oil pan leak.

The GryphonTek Signature Series Kit is the definitive fix to keep your Citroën’s engine bay pristine. By upgrading to Reinforced Silicone and a Billet Aluminum junction, you remove the primary weak link in the turbo’s lubrication loop. The added aluminum foil sleeve ensures the hose won't degrade under the intense heat of the "Hot Side," keeping your driveway clean and your DS's refined atmosphere intact. Fix it once, fix it right, and choose the hardware engineered for the long haul.

Support & Logistics

Shipping & Global Export +

Proudly exported to 75+ countries. All orders are dispatched via DHL Express, FedEx, or EMS from our Taiwan manufacturing hub.

  • AU / USA: 3-5 Business Days.
  • Rest of World: 5-12 Business Days.
  • Tracking: End-to-end tracking number provided within 24H.
Import Duties & Taxes +

We’ve optimized our tax process for core markets to ensure zero hidden fees:

USA MARKET

All-inclusive pricing. No hidden duties or extra fees at delivery.

AUSTRALIA

Orders under AUD 1,000 are typically tax-free. No GST surprises.

*Other Countries: Import duties are determined by local customs and are the buyer's responsibility.

30-Day Returns & Warranty +

30-Day Returns: If you change your mind, we offer a return or exchange within 30 days of delivery. (Return shipping cost is the buyer's responsibility).

Limited Lifetime Warranty: Covers manufacturing defects under normal operating conditions. (Excludes racing misuse or improper installation).

GryphonTek Engineering — Precision Fitment. Global Delivery.