Cummins diesel engine repair and overhaul
An independent Cummins repair shop in Industrial Area 15, Sharjah. We overhaul and repair Cummins engines in generator sets, marine installations, plant and trucks — and we machine the heavy components on our own machines rather than sending them out.
The families that arrive
Cummins engines we work on
Send the engine model, CPL and serial number and you will be told plainly whether yours is a job we take, before anything is moved.
N series — NTA855
The 14-litre inline six that ran for decades in gensets, drilling rigs, marine auxiliaries and industrial drives. Still everywhere in this region, and still economically repairable — which is the point.
K series — KTA19, KTA38, KTA50
The heavy frame: the 19-litre inline six, and the V12 and V16 machines in large gensets, marine propulsion and auxiliaries, and heavy plant. These are the engines where in-house machining matters most.
QSK series
The electronically controlled descendants of the K family, which brings ECM diagnostics and electronic fuel control into the job alongside the mechanical work.
Mid-range, B and C series
In plant, gensets and commercial vehicles. Ordinary workshop work here, machining included.
Not if the one in the engine can be ground. That single sentence is the reason most Cummins work reaches this workshop rather than a service van, and it is a measurement rather than an opinion: a crankshaft's repairability turns on ovality, hardness, bend and crack depth, and on how much material remains above Cummins' bottom permitted undersize. A block turns on liner bore wear, taper and ovality, and on main bearing bore alignment. A head turns on flatness, seat recession and cracks. Every one of those readings is taken here, in the same building where the machining would happen if the answer comes back favourably — so the low-commitment first step is not a quotation and not a parts order. Send the component and let us measure it. On a KTA or an NTA855, knowing early that a part is past recovery is worth more than any discount.
Scope
What we do on a Cummins engine
Bottom end and block
- Full overhaul — strip, measure, machine, rebuild and test
- Crankshaft grinding to undersize where recoverable
- Liner bores measured and machined; main bearing bores line bored
- Connecting rods resized, small end bushes fitted and bored
Cylinder heads
- Heads stripped, valves and seats reconditioned
- Decks surfaced to gasket specification
- Castings pressure tested with hold time recorded
- Injector tubes and sleeves replaced, protrusion checked
Fuel and air
- Injectors and injection pumps stripped, tested and calibrated on our own benches
- Holset is a Cummins brand, and Holset units off these engines are stripped, rebuilt and balanced on our own bench
- Aftercoolers, heat exchangers and oil coolers cleaned and pressure tested
Electrical and control
- ECM fault code reading, live data and ECM repair
- A fault code names a circuit, not a broken part — the circuit is verified before a control unit is condemned
- Starter motors and charging alternators overhauled and tested on the bench
Whole generator set work — alternator, control panel, load testing, genset troubleshooting — is covered in the generator repair section rather than here, and brand by brand on Cummins generator and genset repair. If the engine is in a vessel, marine main engine repair covers the engine-side work.
A fair question, answered factually
Independent specialist, or authorised dealer
We hold no Cummins dealership and we are not a distributor. Here is where each route genuinely wins.
Straight answers
Frequently asked questions
Are you a Cummins dealer?
No. We hold no brand dealership of any kind, and we say so on our own site. We are an independent workshop that repairs and overhauls Cummins engines.
Will using an independent workshop void my warranty?
If the engine is still under manufacturer warranty, that is a real risk and you should use the authorised network. Out of warranty, it is not an issue.
Do you use genuine Cummins parts?
We quote genuine parts where you want them or your policy requires them, and quality aftermarket where that is the sensible choice — and the quotation states which is which. We are not restricted to one supply channel.
Can you rebuild a KTA or NTA cylinder head?
Yes. Heads are stripped, valves and seats reconditioned, decks surfaced and units pressure tested, with the machining done here.
Can you repair a Cummins ECM?
ECM fault diagnosis and repair is handled — see ECM, ECU and governor repair. A fault code names a circuit, not a broken part, so we verify the circuit before condemning the control unit.
My Cummins generator will not hold load — is that this page?
That is a genset question rather than a brand question and it is answered under generator repair.
Get a Cummins engine quoted
Engine model, serial number, application, running hours and the symptom. Photograph the data plate — the CPL and serial number tell us more than a description does.