Northern Motor Engineers - Complete Engine Remanufacturing
Iron based fluorescent particles


Cleaning Pressure Testing and Crack Detecting

Engine components are cleaned using a high pressure cleaner, an acid tank, if necessary and then put through our Bupi cleaning machine.

The crack tester is used to detect cracks that the naked eye can not see. The process ensures that any cracked engine components are found before they go through the system. This picture illustrates how the cracks are detected. Iron based fluorescent particles collect in the cracks and show up under ultra violet light when the item is magnetised.

Crack Detection

The block machining department encompasses: Machining of block decks, Reboring for oversize pistons, Resleeving bores back to standard specification, Cutting counter bores & repairing parent bores, Sleeving of seal areas, Sleeve inserts, Welding, Metal spraying, Crack testing

With our line borer we are able to machine and repair main tunnels and camshaft tunnels in blocks.


Reboring oversized pistons
Block deck machining
Cylinder block machining
Crankshaft Grinding
Every crankshaft that passes through the workshop is crack tested, hardness tested and checked for straightness prior to any machining being carried out. The finishing polish is performed with high quality belts, designed to leave a specific finish on the journals according to factory specifications. Apart from grinding cranks, we can also straighten cranks, metalspray seal areas and repair damaged keyways.
Conrod Reconditioning
Modern machines
Cylinder Head Overhauling
We use metal spray to repair corroded areas on cylinder heads, as well as various other worn or damaged areas on blocks and many other components.
Motors that arrive for reconditioning or remanufacturing are stripped down, cleaned and quoted for repairs. The components are then moved to the various sections for machining and once the machining has been completed and the parts have been ordered, the engine is assembled by one of our qualified tradesmen. All complete engines have the oil pressure tested and engines are bench tested and or Dyno Tested. Here we perform our final checks in order to maintain our high quality standard. Finally, engines are sprayed, painted and packaged for dispatch.

Engine Dynamometer Testing
Engine Assemblies

The Complete Diagnostic System

With our engine Dyno test cell we are able to measure engine power, torque and rpm of a wide range of engines. Oil pressure, coolant temperature, exhaust temperature, turbo boost pressure and other useful indicators are recorded. Engines are run in using stages of increased torque settings according to the specific engine specification. We make use of advanced engine testing software to produce a power/torque curve report that is compared to the OEM engine specification and is the ultimate test of true engine performance. Peace of mind is assured when we are able to simulate typical workloads of engines before they are fitted to the vehicle.Ê

All conrods have the big ends and small ends checked for size and straightness. New small end bushes are fitted and machined to exact specifications. We are also able to proof test the small end to ensure that the new bush will not move once the rod is fitted to the motor. Big ends that are out of size, oval shaped or damaged in some way are honed or resized to bring them back to within the specifications. After all of the machining is complete, the big end and small end of the conrod are polished.
We have a comprehensive range of machining services to ensure that all aspects of engine remanufacturing are done with a complete and professional service.
Cylinder Head Overhauling Our head section is fully equipped to overhaul a large range of cylinder heads. Our modern machines and equipment make it possible to provide a high quality job every time. All cylinder heads that come here for an overhaul are hot and cold pressure tested before commencing any machining or repairs. Once the head has been crack tested and approved for repairs, it is reconditioned to manufacturers specifications. Upon completion, all heads go through a final inspection stage in order to satisfy our quality control standards.