Bosch CP1 and CP1H pump repair across Ukraine
We repair removed Bosch CP1 and CP1H pumps for Mercedes CDI, Fiat JTD and MultiJet, PSA HDi, Opel CDTI and Fiat Ducato 2.3: inspection with photos, repair and bench pressure test.
Price: from 2,500 UAH
How the CP1 works
The CP1 is one of Bosch's first Common Rail pumps: three plungers arranged in a star around an eccentric shaft. On early systems the pressure is controlled by a DRV valve; the CP1H version meters the inlet fuel with a ZME (M-PROP) valve. The CP1 is fitted to first-generation Mercedes CDI, Fiat and Alfa Romeo JTD and early Peugeot and Citroen 2.0 HDi engines; the CP1H to Fiat and Opel 1.3 and 1.9 MultiJet / CDTI and the Fiat Ducato 2.3 MultiJet.
What fails
- Worn plungers and barrels: the pump can't hold pressure when starting and at idle
- Worn eccentric and shaft ring, metal particles
- Sticking DRV or ZME valve: the pressure hunts, the engine stalls or goes into limp mode
- Leaks at the housing seals
A word on metal particles
If the pump has broken up, the particles travel on into the rail and injectors. Repairing the pump alone is then not enough: the lines and rail need flushing, the filter replacing and the injectors checking. Otherwise the leftover particles will ruin the rebuilt pump.
How we repair it
We strip the pump, send you photos of the worn parts and agree the price. After the repair we bench-test pressure, output and valve operation.
Estimate the cost
FAQ
How do I send parts for repair?
Remove the pump or injectors, plug the openings, pack them tightly and ship via Nova Poshta. Add a note with your phone number and car model. See the Delivery & payment page for details.
Do you give a warranty?
Yes, on the work done and installed parts. The terms are stated in the report.
When will I know the price?
After the bench test we call you to agree the price. We never start a repair without your approval.
Why check the turbocharger, injectors and pump together?
The turbocharger, injectors and high-pressure pump work as one system. Worn injectors flood the cylinders with excess fuel, which overloads the turbocharger. A worn pump contaminates the whole fuel system with metal shavings and damages the injectors. A faulty turbocharger delivers the wrong boost, so the engine runs with the wrong air-fuel balance. Repairing just one part often means the problem comes back, so we recommend having these units checked together: on the bench we find the root cause instead of only fixing the symptom.
What should I do if I notice signs of a fault?
Don't put it off: a small fault quickly becomes an expensive one. Don't rely on “miracle additives”: they don't restore worn parts. Don't drive if you hear grinding, see heavy smoke or the oil pressure drops. Get in touch: we'll advise you, test the removed parts on the bench and tell you honestly whether a repair is needed and which one.