Caterpillar · Auxiliary Engine

Caterpillar M551 Spare Parts

Genuine and Alang-reconditioned spare parts for the Caterpillar M551 four-stroke marine diesel engine — large general cargo, tankers, obos of 70s/80s era. Shipped from Bhavnagar, India to any port worldwide.

Bhavnagar · beside Alang yard
24–48hr emergency dispatch
Genuine · OEM-equivalent · reconditioned
Measured to maker’s limits

Parameter	M551
Maker	Caterpillar
Model	M551
Equipment	Four-stroke marine diesel engine
Bore	450 mm
Stroke	550 mm
Power output	780–835 BHP/cyl (~4,000–5,200 kW for 8-cyl)
Speed	425 rpm
Production status	Out of production
Production years	1970s–1980s
Application	Large general cargo, tankers, OBOs of 70s/80s era

Figures as published for the M551. We confirm against the nameplate before quoting.

M551 Spare Parts We Supply

Cylinder liner
Cylinder head complete
Cylinder head gasket set
Piston complete
Piston crown and skirt
Piston rings
Gudgeon pin and bush
Connecting rod
Big-end bearing shells
Main bearing shells
Thrust washers
Camshaft and cam sections
Cam followers / roller guides
Inlet valve with seat and guide
Exhaust valve with seat and guide
Valve rotators and springs
Rocker arm assembly
Push rods
Fuel injection pump
Fuel pump element (plunger and barrel)
Fuel injector and nozzle
High-pressure fuel pipe
Lube oil pump
Water pump (HT/LT)
Turbocharger cartridge
Charge-air cooler element
Governor drive and linkage
Complete gasket and O-ring kit

Genuine, OEM-equivalent and Alang-reconditioned. Every reconditioned part is measured against the maker’s limits before it leaves us. If your part is not listed, send the part number — most Caterpillar items are sourceable through the yard.

About the Caterpillar M551

The Caterpillar M551 is a four-stroke marine diesel engine. It runs a 450 mm bore and 550 mm stroke. Status: Out of production. Built 1970s–1980s. Application: Large general cargo, tankers, OBOs of 70s/80s era

Source: our Auxiliary Engine spec research file (auxiliary-engine/00-all-brands-MERGED.md).

Why Source M551 Parts from Wattmare?

We are in Bhavnagar, next to Alang — the world’s largest ship-recycling yard, and where reconditioned marine parts actually come from. We hold fast-moving items, source the rest through the yard and our trader network, and dispatch worldwide in 24–48 hours on emergency orders.

Salim Dholia
Wattmare · Bhavnagar / Alang, India

Related Caterpillar Models

M552 M552C M601 M601C C15 C32B All Caterpillar spare parts Auxiliary Engine spare parts Reconditioned parts 24–48hr emergency

Frequently Asked Questions

What Caterpillar M551 spare parts do you supply?

Genuine, OEM-equivalent and Alang-reconditioned parts for the M551, including cylinder liner, cylinder head complete, cylinder head gasket set, piston complete, piston crown and skirt, piston rings. Send the part number for anything not listed.

What is the delivery time for M551 parts?

Stock items dispatch the same or next working day from Bhavnagar. Emergency orders ship in 24–48 hours to any major port. Sourced items depend on the yard — we confirm a real date before you commit.

Are your M551 parts genuine or reconditioned?

Both. We supply genuine and OEM-equivalent new parts, and Alang-reconditioned parts measured against the maker's limits before dispatch. We tell you which you are buying — we do not sell reconditioned as new.

Need M551 parts?

Send the equipment number and part number. We quote with a real availability date, not a maybe.

WhatsApp for a quote Call +91 98252 08105