PCH117840 - Coolant Hose – Expansion Tank Vent

- €16,90

€16,90

€16,90 - €16,90

€16,90

Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.

Coolant Hose - Expansion Tank Vent is the bleed hose in the engine cooling system, connecting the radiator bleed outlet to the coolant expansion tank.

It forms the vent line of the cooling circuit, allowing trapped air and small volumes of coolant to pass back to the expansion tank. This supports correct filling and bleeding of the system and helps maintain stable coolant circulation.

Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994

Fitment Notes DEFENDER 1983-2006 — expansion tank bleed/vent hose, 2.5L TDi (Non-EEGR)
DISCOVERY 1 1989-1998 — expansion tank bleed/vent hose
RANGE ROVER CLASSIC 1970-1994 — expansion tank bleed/vent hose

Alternative Codes

PCH117840PCH117840XESR2348ESR2661ESR3436PDL100000

In stock 3 units

2 · Gouda 1 · Drachten

Express delivery available

When will my order arrive?

Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
Netherlands / Belgium / Germany: 2–4 working days.
Other EU countries + UK: 4–8 working days.
Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the PCH117840 expansion tank vent hose do?

The PCH117840 is the bleed or vent hose in the cooling system. It connects the radiator bleed outlet to the coolant expansion tank, letting trapped air and small amounts of coolant pass back to the tank. This supports correct filling and bleeding and steady coolant circulation.

Which Land Rovers does this vent hose fit?

This vent hose fits the Land Rover Defender (2.5L TDi Non-EGR), Discovery 1 (1989-1998) and Range Rover Classic. The Defender fitment is the Non-EGR 2.5L TDi specifically, so confirm your engine before ordering, as EGR-equipped variants can differ.

Are there alternative part numbers for this hose?

Yes, this hose is cross-referenced as ESR3436, ESR2348, ESR2661 and PDL100000. Any of these numbers identifies the same expansion tank bleed hose, which helps when matching against an old part or another supplier's catalogue listing.

What happens if this vent hose fails?

A perished or split vent hose lets air into the cooling system and can cause coolant loss, making the system hard to bleed and prone to airlocks or overheating. Cracks, hardening or weeping at the tank or radiator end mean it's time to replace it.