Engine reconditioning explained

At Mercedes Engine Rebuilds you can be mind rest assured that all our full engine rebuilds include the following components to be replaced with brand new genuine Main dealer parts:

  • The Piston rings are replaced
  • The Main ends and big end bearings replaced
  • A brand new full gasket set is fitted.

  • The Crankshaft replaced
  • The Oil pump replaced
  • The Liner/s are honed or re-bored

This is why we are able to offer all our customer the guaranteed 12 months unlimited mileage warranty as the biggest advantage of using OEM part straight from the dealership is that they give us the 12 months warranty with them so you are fully covered by us and also by the main dealer unlike other garages that will fit second hand parts and in the event that they may fail neither party is covered causing bills to rise and some very dissatisfied customers.

On top of the above the Cylinder Head(s) will be fully reconditioned by our in-house skilled professionals which includes the following:

The cylinder head will be pressure tested, the Valves and seats will be refaced, Brand-new valve stem Seals will be added, the Head gasket(s) will be replaced, Camshafts will be replaced, New Tappets/hydraulic lifters will be fitted along with the Cam-carrier and then lastly a new timing chain or timing belt will also be installed. Again, all parts fitted are brand new OEM parts straight from the main dealer.

Our In-house machining shop allows us to carry out all our own machining keeping costings down and carrying out our machining to the highest possible standard for all our customers. Additionally, there are no extra delays as there is no need to send parts away to be machined to cause any time delays for our customers.


Firstly, each engine is stripped down to its bare components. Using specialist cleaning equipment (Kerosene bath and high temperature solvent washer) Then all the engine components are degreased and thoroughly cleaned.


After disassembling the units, they are then sent for machining where all engine block cylinders are professionally rehoned or rebored, all cylinder heads are pressure tested, skimmed, valve seats are cut and all valves are resurfaced.


In assembly stage of the engine reconditioning process, brand new Eristic gaskets are used, ACL bearings are used for the mains and big ends. Then the gas nitride piston rings are fitted to ensure quality parts are used throughout. The Crankshaft journals are then checked and measured to assess the condition and then are polished or reground whereverrequired. Lastly the engine is timed up with a brand new timing kit.


All throughout the assembly process there are strict quality control measures that are enforced. All measurements are double checked to make sure the final product is reliable for years to come.

Advantages of having your engine reconditioned

Having your original engine reconditioned or rebuilt offers various benefits compared to having a second-hand engine fitted to your vehicle, below you can find a list of the most important points to keep in mind:

  • Modern vehicle now days have a great amount of variations and specifications, keeping your original engine prevents these compatibility concerns.

  • Hassle free/no paperwork involved – Customers canretain their original engine number so there is no need to make contact with the DVLA to make administration adjustmentsto the V5C documentation.

  • There’s NO need to inform the new buyer that the original engine has been change – As this can put potentially buyers off in the future.

  • Although all our second-hand units are fully tested please keep in mind that all the engine internals have not been replaced with all new genuine OEM parts so we cannot guarantee these units as if it was our own work. We will only offer a 6 months unlimited mileage warranty compared to a 12 months unlimited mileage warranty with the fully reconditioned option. As we can guarantee these works as we have carried them out ourselves.

  • Another benefit is that as we only used genuine main dealer parts IF for any unlikely reason anything was to go wrong with a part then you are covered by ourselves plus by the main dealers promise – So you are essentially covered twice!

  • All the internals off the engine are replaced so essentially, it’s like having a brand-new engine again.

  • Buyinga second-hand unit can lead to many problems, the major disadvantage is that if in the unfortunate event that anything were to go wrong with it. Then the mechanic fitting the engine could blame the failing of the engine rather than his fitment error and the supplier of the engine may blame the fitment error of the mechanic rather than their goods leaving the customer in the middle with more expenses to pay to rectify the issue, or you can find yourself at a stale mate position causing long delays to get your vehicle back on the road. Thankfully this problem will never occurby having Mecedes Engine Rebuilds recondition your unit as there will be no confusion over the fitment of the engine nor the parts/engine because we have stripped and reassembly your whole engine from a bare block we warranty the whole lot!!!! The Fitment and engine!!!

  • All Second-hand units are sold on an exchange basis so please also find out if the price quoted includes a surcharge as this can sometimes make the price actually higher than just reconditioning your originally unit.

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