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Bmw M140I Engine Coolant Water Outlet Housing Kits

Bmw M140I Engine coolant water outlet housing kits

Starting at $162.95, AutoBuffy stocks 1 engine coolant water outlet housing kits from Four Seasons for the Bmw M140I. The outlet housing seals the point where coolant exits the engine block or head toward the upper radiator hose. When it cracks, warps, or its gasket fails, coolant leaks and the engine overheats — damage that escalates quickly if ignored.

Signs your Bmw M140I needs a new engine coolant water outlet housing kit

  • Visible coolant puddle or wet staining around the upper radiator hose neck or thermostat housing area
  • Sweet smell of antifreeze from the engine bay, especially after the engine warms up
  • Temperature gauge climbing higher than normal or spiking unexpectedly during normal driving
  • Low coolant warning light or consistently dropping coolant reservoir level with no obvious external leak
  • White residue or mineral deposits crusted around the outlet housing flange or mounting bolts
  • Coolant seeping onto accessory belts, causing squealing or accelerated belt wear

Which engine coolant water outlet housing kit should you buy for your Bmw M140I?

The main decision is material and kit completeness. Housing kits vary by whether they include just the housing, or add a new thermostat, O-ring, and gasket — buying a complete kit saves a second coolant drain if the thermostat fails soon after. Material choice affects longevity, particularly on engines prone to electrolytic corrosion that degrades plastic housings.

OEM-spec plastic housing kit
Best for
Budget-conscious owners doing a straightforward like-for-like replacement
What you get
Housing matched to factory fit, gasket or O-ring included; same material as original
Aluminum billet housing kit
Best for
Owners in high-mileage or high-heat applications wanting a permanent fix
What you get
Corrosion-resistant cast or machined aluminum housing, gasket/O-ring, often longer service life
Complete kit with thermostat
Best for
Anyone whose thermostat is original or unknown age
What you get
Housing, thermostat, gasket, and all seals in one box; eliminates a second job if the thermostat sticks
Upper + lower outlet housing combo kit
Best for
Vehicles with two housing failure points or when both show seepage
What you get
Both housings, all gaskets and O-rings; reduces labor by addressing all outlet points in one coolant drain

Engine coolant water outlet housing kits brands we stock for your Bmw M140I

Four Seasons
1 option · from $162.95

Replacing the engine coolant water outlet housing on a Bmw M140I

Moderate⏱ 1–2 hoursSocket set and ratchetDrain pan for coolantScraper or gasket removal toolTorque wrenchFunnel for refilling coolant

Allow the engine to cool completely, then drain coolant from the radiator petcock or lower hose until the level drops below the outlet housing. Remove the upper radiator hose and any bracketed accessories blocking access, unbolt the housing, and clean the mating surface thoroughly before installing the new gasket or O-ring dry or with a thin coolant-compatible sealant if specified. Snug the housing bolts in a crossing pattern to the manufacturer's recommended range, refill the system with the correct coolant mixture, run the engine to operating temperature, and check for leaks before returning the vehicle to service.

Frequently asked questions

How much does it cost to replace engine coolant water outlet housing kits on a Bmw M140I?
Parts start at $162.95 for the Bmw M140I at AutoBuffy. A complete DIY job adds minimal cost beyond coolant to refill the system. Shop labor typically runs one to two hours. Choosing a kit that bundles the thermostat and all seals avoids a repeat labor charge if those components fail shortly after.
Can I drive my Bmw M140I with a leaking coolant outlet housing?
You should not. Even a small coolant leak lowers the system's pressure and fluid level, which causes the engine temperature to rise. Continued driving risks warping the cylinder head or causing full overheating. If the leak is active, stop driving and let the engine cool before inspecting or topping off coolant.
Is the engine coolant water outlet housing the same as the thermostat housing on my Bmw M140I?
Not always, but they are often integrated or adjacent. On many engines the outlet housing bolts directly to the thermostat housing or contains the thermostat itself. Check your specific engine layout. If they share a gasket surface or the outlet sits atop the thermostat, replacing both together during the same repair is strongly recommended.
What gasket or O-ring does the outlet housing kit use on a Bmw M140I?
Most modern outlet housings seal with a molded rubber O-ring rather than a cut gasket, though some older or cast-iron engine designs use a flat fiber or multi-layer steel gasket. Quality kits for the Bmw M140I include the correct seal for the application. Reusing the old seal is a common cause of repeat leaks.
How long does an engine coolant water outlet housing last on a Bmw M140I?
Plastic housings typically last many years but are vulnerable to heat cycling, electrolytic corrosion, and overtightening during prior service. Aluminum housings generally outlast plastic. Failure is often triggered by a stuck-open thermostat causing prolonged overheating, or by aged coolant that becomes acidic and attacks sealing surfaces over time.
Do I need to flush the coolant when replacing the outlet housing on my Bmw M140I?
The coolant system must be drained to at least the housing level before removal, so it is a practical opportunity to flush and refill with fresh coolant. Degraded coolant is acidic and accelerates corrosion on new parts. Refilling with the correct coolant type and concentration for the Bmw M140I is essential after reassembly.

Shop engine coolant water outlet housing kits by year for the Bmw M140I

20182017

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