Lohen Forged Crate Engine N14 - Config 4

Lohen recommends this engine configuration for MINI owners who wish to push the car hard on the circuit and build a high-powered high revving road car.

The Lohen Config 4 Crate Engine changes the main construction of the engine block. The heart of the engine is precision machined away to allow the Darton sleeves to be inserted. The Darton sleeves do away with the original water jacket and cooling paths to create a much stronger engine. This strength means the cylinder wall cannot bow or warp, something that is more likely when using high levels of boost to create lots of power.

Dartin sleeves can be replaced individually making the block much more serviceable, ideal for those doing multiple seasons of racing looking to for a more time effective solution should the worse happen.

To maintain the new coolant pathways a Supertech high performance head gasket is required. The original profile gasket obstructs these new cooling galleries.

The Config 4 engine benefits from full Supertech valvetrain upgrade allows the car to run at higher RPM points without fault. The valves are more resistant to heat related failures than the standard valves thanks to their forged construction. Strong and lightweight components ensure the engine harnesses all its power.

About Lohen Crate Engines

Lohen has used experience and knowledge of the MINI N14 engine (EP6 engine platform) to produce a remanufactured performance Crate Engine that strengthens the areas we see as common failure points. The Lohen N14 Crate Engine is suitable for the MINI Cooper S 2007 – 2010 or MINI JCW 2007 – 2012 and is supplied on an exchange basis.

All engines are re-built in-house by Lohen to OEM or higher specification from donor units that have been checked for tolerances and overall condition. Cylinder bores are checked for ovality and are either honed or bored-and-honed for the right size piston to the correct tolerance. Cranks are checked for size, wear and damage before they are re-used and, where appropriate.

The Lohen Configuration 4 engine uses forged pistons and connecting rods to strengthen the bottom end of the engine. The N14 short block is assembled using new piston rings, motorsport grade bearings throughout as well as ARP 2000 bolt and stud kits to ensure the engine is tied together tightly.

Heads are checked for straightness, then pressure tested as well as having the cam tolerances checked. They are reassembled with OEM specification components such as intake valves and exhaust valves, and all rockers and lifters are changed.

All engine components such as the block and cylinder head are thoroughly cleaned and prepared prior to assembly and all engines are re-assembled using brand new gaskets, seals, and chains.

Please note - Lohen Crate Engines are supplied as timed-up bare units without any other bolt-on ancillaries. The engines are therefore shipped dry and require final assembly and fluids prior to installation and starting.

If required, Lohen can supply a fully built engine for an additional charge. We also offer professional in-house installation and running in service at our workshop.

Exchange Donor Unit Surcharge
Lohen will apply a surcharge to every engine sold unless a donor unit is supplied and it is deemed to be in re-buildable condition.

Optional Extras

Lohen offers a range of extras to a selection of Lohen Forged engines to allow customisation.

N14 Engine Installation kit is a comprehensive collection of parts that is suggested when installing a Lohen Crate Engine. Click Here For full details about the Lohen N14 Crate Engine Installation Kit - in summary, this includes 1 x running in oil, 2 x engine oil changes. oil filters, gaskets, coolant, water pump, thermostat, oil pressure sensor, necessary bolts

Crank Shaft Balancing and piston matching
Balancing the crankshaft is important when building a performance engine. Weight out of balance from the centre point has a direct relationship to engine speed so, for those pushing the MINI engine harder, it is vital the crankshaft is balanced to improve the durability of the engine and, in particular, the engine bearings, reducing engine vibration and improving performance. We suggest that this process is completed using a single mass flywheel.

Choice of Camshaft
Lohen offers MINI OEM camshafts as standard but this can be upgraded to the Schrick performance inlet and exhaust camshafts. The Schrick camshafts are profiled to increase the duration the valves are open. This increases the volume of air and fuel entering the cylinders and allows for a greater amount of power to be developed. When selecting the Schrick camshaft option, please note Supertech titanium retainers will be substituted for the Schrick made option to run with the camshaft. This is reflected in the pricing for the Schrick camshafts.

• Closed deck block using Darton sleeves
• Supertech Forged Pistons 
• Supertech Piston Ring Sets
• Supertech Forged Connecting Rods
• Supertech high performance head gasket
• ARP 2000 Connecting rod bolts
• ARP 2000 Head stud kit
• ARP 2000 Main bolt kit
• Mahle Motorsport Big end bearings
• Mahle Motorsport Main bearings
• Supertech forged Inconel exhaust valves
• Supertech forged black nitride coated intake valves
• Supertech single groove valve collets on intake and exhaust side. 
• Supertech beehive valve springs
• Supertech titanium valve retainers
• Supertech bronze valve guides
• OEM specification rocker arms and lifters
• Timing chain kit
• Lohen gasket kit
• OEM oil pump 
• Rocker Cover

Lohen offers professional, in-house fitting for all products at our workshop in Eccleshall, Staffordshire. Here are the important things you need to know:

Fitting Cost - £1500. Includes installation and running on the dyno. 

Fitting Time - 20 hours

Required Additional Items/Services - N14 Engine Installation kit is a comprehensive collection of parts that is suggested when installing a Lohen Crate Engine. Click Here For full details about the Lohen N14 Crate Engine Installation Kit - in summary, this includes 1 x running in oil, 2 x engine oil changes. oil filters, gaskets, coolant, water pump, thermostat, oil pressure sensor, necessary bolts 

Lohen Recommends - Inspecting clutch and flywheel operation while the engine and gearbox are out and replacing them as necessary. It's also an ideal time to add a differential for a performance upgrade. Consider the Quaife ATB for road and track day use or the 3J Driveline LSD for track specific work. The addition of Samco boost and coolant hose kits is advisable for the high-performance engine. We'll also discuss your intended use to specify the correct oil for the application and engine build specification. 

Why do we apply a surcharge?
A surcharge is charged because Lohen recondition and re-use certain components, such as the head, crank and the crank case. We do this to reduce costs to customer and components will only be used if they pass strict inspection criteria. Any wearable components are completely replaced in the upgrade process.

How it works
The surcharge applies when a donor engine is not supplied back to Lohen or the condition of the donor engine is deemed by Lohen to be beyond re-buildable (i.e. major damage to head, crank, block bores or external parts of the engine.)

Once the donor engine is received Lohen will assess and measure the unit for tolerances and issue any appropriate refund of the surcharge within 7-10 working days. Should certain components within the donor engine be deemed unusable the surcharge will be only partially refunded. Please contact the sales team for full information.