Skip to content
KickTyres
MajorCommonCooling

Mini Clubman: Thermostat housing, plastic coolant pipe and water pump leaks

Thermostat housing, plastic coolant pipe and water pump leaks is a common cooling fault on the Mini Clubman on the 2008–2014 cars, and we rate it major. Putting it right costs $700 to $1,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 12 documented faults on the Mini Clubman.

Vehicle
Mini Clubman
Years
2008–2014
Fuel
petrol
System
Cooling

This page covers the Mini Clubman as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Mini Clubman faults12 documented faults on this model

What you are looking at

An annotated photograph of an automotive engine thermostat identifying the wax capsule and both disc valves.Example of the part — not this vehicle

A double-valve engine thermostat, labelled: the wax capsule is what sticks.

Dougsim · CC BY-SA 3.0 · Wikimedia Commons

What goes wrong

The Prince engines in the R55 use a plastic thermostat housing and plastic coolant pipes that crack and weep with heat cycling, and the water pumps fail early by the standards of the class. Coolant loss on these small-capacity systems escalates to overheating quickly, and an overheated N14 often follows with head gasket or worse. Most surviving cars have had at least one of the housing, pipe or pump replaced — check which, because whatever hasn't been done is next.

What you would notice

  • Coolant smell or visible drips under the engine
  • Low coolant warnings or repeated topping up
  • Crusty residue around the thermostat housing
  • Temperature creeping up in traffic

How to check it

Where to look. Thermostat housing and coolant pipes at the front of the engine; water pump behind

  1. With the engine cold, check the coolant level and look around the thermostat housing (front of the engine) and along the plastic coolant pipe for staining or dampness.

  2. Ask which cooling system parts have been replaced and see invoices.

  3. Watch the temperature readout during the whole test drive.

Parts involved: Thermostat, Water pump.

What it costs to put right

$700 to $1,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

  • “Which of the thermostat housing, coolant pipes and water pump have been replaced?”
  • “Has the car ever overheated?”

Now check the Mini Clubman you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in the sources below. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them.

  • eEuroparts — how to replace Mini coolant pipe and thermostat on 2nd-gen models
  • North American Motoring — 'R56 N14 coolant leak' thread
  • Mini2.com — 'Coolant leaking, thermostat housing?' thread

Mini Clubman buyer questions

Is thermostat housing, plastic coolant pipe and water pump leaks serious on a Mini Clubman?

We rate it major and common on the Mini Clubman. The Prince engines in the R55 use a plastic thermostat housing and plastic coolant pipes that crack and weep with heat cycling, and the water pumps fail early by the standards of the class. Coolant loss on these small-capacity systems escalates to overheating quickly, and an overheated N14 often follows with head gasket or worse. Most surviving cars have had at least one of the housing, pipe or pump replaced — check which, because whatever hasn't been done is next.

How much does it cost to fix on a Mini Clubman?

$700 to $1,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Mini Clubman years are affected?

Our research records this fault on the 2008–2014 Mini Clubman. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

With the engine cold, check the coolant level and look around the thermostat housing (front of the engine) and along the plastic coolant pipe for staining or dampness. Ask which cooling system parts have been replaced and see invoices. Watch the temperature readout during the whole test drive. Look here: Thermostat housing and coolant pipes at the front of the engine; water pump behind