LR176861 - Coolant Expansion Tank Cap
Original price
-
Original price
€5,50
Original price
€5,50
€5,50
-
€5,50
Current price
€5,50
Tip: Log in to your account to unlock volume discounts on this item.
Aftermarket: Quality alternative.
This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.
Coolant Expansion Tank Cap - pressurised filler cap for the coolant expansion and overflow container in the engine cooling system.
The cap sets the operating pressure of the whole cooling circuit. A calibrated relief valve inside it keeps the coolant under pressure so its boiling point rises well above atmospheric, protecting against local boiling at the cylinder head and cavitation at the pump; once the rated pressure is exceeded the valve lifts and vents into the overflow path. As the engine cools and the coolant contracts, a vacuum valve in the same cap admits air and coolant back into the system so hoses and the tank are not drawn in.
Symptoms of a failing cap are a system that will not hold pressure on test, coolant disappearing without a visible leak, and overheating that only appears on long climbs or when towing. The cap is a consumable and is normally renewed alongside the expansion tank.
The cap sets the operating pressure of the whole cooling circuit. A calibrated relief valve inside it keeps the coolant under pressure so its boiling point rises well above atmospheric, protecting against local boiling at the cylinder head and cavitation at the pump; once the rated pressure is exceeded the valve lifts and vents into the overflow path. As the engine cools and the coolant contracts, a vacuum valve in the same cap admits air and coolant back into the system so hoses and the tank are not drawn in.
Symptoms of a failing cap are a system that will not hold pressure on test, coolant disappearing without a visible leak, and overheating that only appears on long climbs or when towing. The cap is a consumable and is normally renewed alongside the expansion tank.
Vehicle Model
Land Rover Defender New 2020+
Land Rover Discovery 4 2010-2016 (L319)
Land Rover Discovery 5 2017+ (L462)
Range Rover 2002-2012 (L322)
Range Rover 2013-2022 (L405)
Range Rover Sport 2005-2013 (L320)
Range Rover Sport 2014-2022 (L494)
Land Rover Discovery 4 2010-2016 (L319)
Land Rover Discovery 5 2017+ (L462)
Range Rover 2002-2012 (L322)
Range Rover 2013-2022 (L405)
Range Rover Sport 2005-2013 (L320)
Range Rover Sport 2014-2022 (L494)
Fitment Notes
DISCOVERY 4 2010-2016 — 3.0L V6 Diesel, 4.0/5.0 V8 Petrol
DISCOVERY 5 2017 on — engine cooling
NEW DEFENDER 2020 on (L663) — 2.0L/3.0L/5.0L/4.4L
RANGE ROVER L322 2010-2012 — 5.0 V8 NA/SC
RANGE ROVER L405 2013 on — 3.0L Diesel, 5.0 V8 NA/SC
RANGE ROVER SPORT L320 2010-2013 — 5.0 V8 NA/SC
RANGE ROVER SPORT L494 2014 on — 3.0L, 5.0 V8
DISCOVERY 5 2017 on — engine cooling
NEW DEFENDER 2020 on (L663) — 2.0L/3.0L/5.0L/4.4L
RANGE ROVER L322 2010-2012 — 5.0 V8 NA/SC
RANGE ROVER L405 2013 on — 3.0L Diesel, 5.0 V8 NA/SC
RANGE ROVER SPORT L320 2010-2013 — 5.0 V8 NA/SC
RANGE ROVER SPORT L494 2014 on — 3.0L, 5.0 V8
Alternative Codes
LR176861
Available to order
2–3 weeks
Not currently in stock. Order now — typically ships within 2–3 weeks.
Need it faster? Contact us about express import (2–5 business days).
When will my order arrive?
This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.
- Netherlands / Belgium / Germany: 2–4 working days after dispatch.
- Other EU countries + UK: 4–8 working days after dispatch.
- Outside EU/UK: contact us for an estimate.
Need it faster? Express import available in 2–5 business days — contact us before ordering.
