
Bock · HGX · FK · HG · Refrigeration Compressor
Genuine, OEM and reconditioned spares for Bock-Bock reciprocating main engines — the Bock HGX, the water-cooled FK / FK and the Bock HG — sourced beside Alang, shipped to India, UAE, Singapore & worldwide.
A century of diesel
Robert Bock founds the company in Frickenhausen, Germany.
Bock becomes a specialist in open-drive reciprocating compressors.
The Bock HG and HGX reciprocating compressors become a transport and marine standard.
Bock builds a global refrigeration, transport and marine service network.
Wattmare keeps every Bock HGX, FK and HG refrigeration compressor running with genuine, OEM-equivalent and Alang-reconditioned spares.
Who is Bock
Bock, of Frickenhausen, Germany, is a leading maker of reciprocating refrigeration compressors — the HGX semi-hermetic and FK / HG open-drive compressors fitted to reefer plants, transport and marine air-conditioning across the world fleet.
A single fleet can run the Bock HGX34, FK40 or the HG open-drive range — and Wattmare supplies genuine, OEM-equivalent and Alang-reconditioned spares (cylinder liners, pistons, connecting rods, suction and discharge valves, shaft seals and bearings) across every Bock refrigeration compressor.

Engine series we cover
Mechanical reciprocatingThe Bock HGX, FK and HG reciprocating refrigeration compressors — cylinder liners, pistons, connecting rods, suction and discharge valves, shaft seals and bearings, genuine and reconditioned beside Alang.
View all 23 HGX models
Water-cooled reciprocatingThe valve gear-free water-cooled reciprocating — discharge valve and discharge valves controlled electronically from a high-pressure rail. We hold rail valves, flow-control units, injection equipment, liners and crowns.
View all 3 FK models
Current reciprocatingThe Bock HGX and FK refrigeration compressors — cylinder liners, pistons, suction and discharge valves and shaft seals.
View all 7 HG modelsBy the numbers
Parts we supply
Honed compressor cylinder liners for the full HGX and FK range, genuine and reconditioned.
Compressor cylinder heads and valve decks with renewed valve seats and studs.
Compressor pistons matched to your exact bore and stage.
Compression and oil-scraper ring sets, pre-profiled for HGX / FK compressors.
Connecting rods with renewed small- and big-end bearings and bolts.
Complete suction valve assemblies, reeds and valve plates.
Complete discharge valve assemblies, springs and valve plates.
Reground crankshafts and crankpins, balanced and crack-tested.
Main, big-end and small-end white-metal and shell bearings.
Suction and discharge valve plates, reeds, seats and springs.
Mechanical / rotary shaft seals and seal kits for the crankshaft.
Crankcase oil pumps, gears and oil-pressure regulation parts.
Cylinder-cutoff unloaders, solenoid valves and capacity-control parts.
Oil separators, oil coolers and inter-stage safety / relief valves.
Complete gasket, O-ring and valve-seal kits for top-overhaul.
High-tensile cylinder-head, bearing and tie-rod studs, nuts and fasteners.
Models & specifications
All 33 Bock-Bock reciprocating models we supply — genuine, OEM-equivalent, or Alang-reconditioned. Tap any model for an instant WhatsApp quote; can’t see yours? Send the nameplate and we’ll match it.
31 Bock-Bock reciprocating models indexed — genuine, OEM-equivalent & Alang-reconditioned. Send your exact HGX / FK / HG designation and we’ll match the part.
Which part is right?
Overhaul & repair kits
Send your exact HGX, FK / FK or HG designation and we assemble a complete decarbonising, top-overhaul or major-overhaul kit — cylinder liners, piston rings, discharge valves, discharge valves, shaft-seal rings, gaskets, O-rings and fasteners. Genuine or reconditioned, every kit ships with material or inspection certificates and a packing list cross-checked to your engine.

Piston rings, discharge valves, cylinder-cover O-rings, discharge-valve grinding set and gaskets for a routine de-carb on one or all units.
Cylinder liner, piston rings, piston-crown inspection set, discharge valves, discharge valve & seat and shaft-seal sealing rings.
Full running gear — liners, crowns, rods, main / crankpin / crosshead bearings, oil pumps or water-cooled parts and complete seal and fastener sets.

Inside the stockyard · 01
The valve gear-controlled HGX through HGX, including the HG open-drive range — liners, covers, piston crowns, oil pumps, chain drives and bearings, genuine and reconditioned beside Alang.

Inside the stockyard · 02
The FK and HG open-drive compressors — liners, pistons, valves and shaft seals for reefer and transport duty.

Inside the stockyard · 03
The larger Bock HG open-drive refrigeration compressors — pistons, liners, valves and complete running gear for high-capacity cooling duty.

Inside the stockyard · 04
Beside the world’s largest ship-recycling yard, we recover low-hour Bock-Bock parts no distributor stocks — documented, packed and airborne to your port.
Why Wattmare for Bock
Direct access to genuine, low-hour Bock-Bock HGX and FK parts no distributor still stocks — 30–50% below European prices.
One WhatsApp, one photo. We confirm stock, document, pack and fly it to your port — day or night.
From obsolete Bock HGX oil pumps and chain drives to FK water-cooled units — we know the difference and stock both.
Material certificates on genuine parts; inspection and measurement reports with photos on reconditioned.
How we source & recondition
Low-hour Bock-Bock parts recovered from vessels at the world’s largest ship-recycling yard.
Every part is dimensionally checked against OEM drawings and Bock-Bock tolerance limits.
Crack-detection, hardness and pressure testing on all critical liners, crowns, valves and bearings.
Inspection report, photos and a 30-day warranty — packed and air-freighted worldwide in 24–48 hours.
Fleets we supply
From capesize bulkers to LNG gas carriers — tap your vessel type for the full spare-parts range.

Bock HGX and FK main-engine spares for handysize to capesize fleets.

HGX and FK wear parts and fuel equipment for VLCC and MR fleets.

HGX/FK running gear plus cargo-pump prime-mover spares for chem fleets.

High-output HGX and HG spares for feeder to ultra-large vessels.

X-DF dual-fuel running gear and combustion components for LNG fleets.

Reciprocating Bock 26 and 32 spares for supply and anchor-handling vessels.

HGX and smaller-bore HGX spares for multipurpose and coaster ships.

HGX and FK main-engine spares for PCTC and Ro-Ro fleets.

Smaller-bore HGX and reciprocating Bock 20 spares for trawler fleets.

Reciprocating Bock 32 and 46 genset and auxiliary spares for passenger ships.

Auxiliary Bock reciprocating and running-gear spares for naval support vessels.

Legacy Bock HGX oil pumps, chain drives and running gear no distributor still offers.
Where we deliver
Air-freighted from Alang / Bhavnagar to the world’s biggest bunkering and repair hubs in 24–48 hours. Tap a market for local lead times and ports.
Diagnose the fault
| Symptom | Likely Bock-Bock parts to inspect |
|---|---|
| Loss of compression or power on one unit | Cylinder liner, piston rings, piston crown |
| High exhaust temperature on one cylinder | Discharge valve / nozzle, discharge valve spindle |
| Knocking or pounding from the crankcase | Main, crankpin or crosshead bearings |
| Excessive cylinder-oil consumption | Liner wear, piston rings, shaft-seal rings |
| Difficult or failed starting | Starting air valve, oil pump (plunger / barrel) or rail valve |
| Black or smoky exhaust | Discharge valve nozzles, slide valves, turbocharger interface |
| Oil leak at the piston-rod gland | Shaft seal and sealing ring set |
| Water in the combustion space | Cylinder head, cooling-jacket O-rings, liner |
Compare the marques
Run a mixed fleet? We supply spare parts across all three of the great single-stage reciprocating marques — here’s how they compare and where each one fits.
The complete guide
Wattmare is a specialist Bock refrigeration compressor spare parts supplier serving India, the UAE, Singapore and the wider global fleet. From our base in Bhavnagar — beside the Alang ship-recycling yard — we supply genuine, OEM-equivalent and reconditioned spares for every generation of Bock-Bock reciprocating marine main engine, dispatched worldwide in 24–48 hours.
The refrigeration compressors on this page are built by Bock of Frickenhausen, Germany, a compressor specialist since 1932. Its HGX, FK and HG reciprocating compressors drive reefer, transport and marine air-conditioning plants across the world fleet. We supply spares for all of them.
The single most important question on any Bock-Bock order is whether the engine is an HGX, an FK or an HG. The Bock HGX is valve gear-controlled — oil pump, fuel cam, chain drive and mechanical discharge-valve gear. The FK / FK and the Bock HG are electronically controlled, replacing the valve gear with a water-cooled supply unit, rail valves, flow-control units (FCU) and hydraulically actuated discharge valves. Liners, covers, crowns and bearings are broadly common by bore, but injection and actuation parts are entirely different — always give us your exact HGX / FK / HG designation.
For every Bock HGX, FK and HG refrigeration compressor we stock cylinder liners, pistons and piston rings, connecting rods, suction and discharge valves, valve plates, shaft seals, crankshaft and main bearings, oil pumps, gaskets and unloader parts — genuine, OEM-equivalent and Alang-reconditioned.
Bhavnagar sits beside Alang, where hundreds of vessels are dismantled every year — including ships still running ageing Bock HGX reciprocating engines. That gives Wattmare direct access to genuine, low-hour parts that are slow or costly to source from distributors, at a fraction of new-part cost and lead time. For hard-to-find HGX oil pumps, chain drives, liners or running gear, this is the fastest source in the world. Browse our reconditioned marine spare parts range, the wider main engine spare parts category, or sister brands like MAN engine spares and Mitsubishi UEC.
Send your Bock engine make and model with a photo or part number on WhatsApp, or use the quote form. We confirm availability and price — usually within the hour — and dispatch in-stock items within 24 hours. Typical air-freight transit is 12–18 hours to the UAE, 16–24 to Singapore, 20–26 to Greece and Turkey, and 28–36 to Northern Europe.
FAQ
Yes — cylinder liners are one of our strongest Bock-Bock lines. We carry original-bore and reconditioned liners for the HGX and HGX, plus the rest of the HGX range (the HGX range), honed to OEM tolerance with measurement reports. Most legacy HGX liners are recovered and reconditioned beside Alang.
The Bock HGX is a valve gear-controlled (mechanical) reciprocating — oil pump, fuel cam and mechanical discharge-valve actuation. The FK / FK and the Bock HG are electronically controlled, replacing the valve gear with a water-cooled supply unit, rail valves, flow-control units (FCU) and hydraulically actuated discharge valves. Liners, crowns and bearings are broadly similar by bore, but the injection and discharge-valve actuation parts are completely different — always quote your exact HGX, FK or HG model.
We cover the full Bock range — the HGX series (HGX34), the FK open-drive series and the HG range — every Bock refrigeration compressor.
Reconditioned parts ship with inspection reports, dimensional measurements and photographs, and are accepted by class societies (Lloyd’s Register, DNV, ABS, BV, ClassNK, RINA) on survey. Genuine Bock parts carry full material and test certificates.
In-stock items dispatch within 24 hours from Bhavnagar. Typical air-freight transit to the UAE (Dubai, Jebel Ali, Fujairah) is 12–18 hours. Singapore is 16–24 hours, Greece and Turkey 20–26, and Northern Europe 28–36.
Yes — discharge valves, injector nozzles, high-pressure oil pumps, plungers and barrels for Bock HGX engines, plus water-cooled supply units, rail valves, flow-control units (FCU) and injection equipment for FK / FK and HG engines, are stocked and bench-tested before dispatch.
Genuine parts come from the original maker (Bock / Bock) with full certificates. OEM-equivalent are quality aftermarket parts at 30–50% less. Reconditioned are low-hour parts recovered from Alang, inspected and certified to OEM tolerance, at up to 70% less with a 30-day warranty.
Yes — obsolete Bock HGX parts are our specialty. Beside Alang we recover low-hour oil pumps, chain drives, liners, crowns and running gear from HGX-powered vessels being dismantled, then inspect and certify them. For the HGX range and HGX engines this is often the fastest source in the world.
Yes — suction and discharge valves, valve plates, shaft seals, cylinder liners, pistons, rings, bearings and complete overhaul kits for the Bock HGX, FK and HG compressors, genuine and Alang-reconditioned.
Send your engine model and a photo or part number on WhatsApp (+91 98252 08105), or use the quote form. We confirm availability and price, usually within the hour — whether you need genuine, OEM-equivalent, used or reconditioned parts, or a complete overhaul kit.
We ship from Alang/Bhavnagar to the UAE, Dubai, Singapore, Greece, Turkey and every major port worldwide in 24–48 hours. Parts are export-packed with VCI wrapping, wooden crates and palletisation, with photos shared before dispatch and full export documentation included.
Yes — decarbonising, top-overhaul and major-overhaul kits assembled to your exact HGX, FK / FK or HG model, with liners, piston rings, discharge valves, discharge valves, shaft-seal rings, gaskets, O-rings and fasteners included.
Request a quote · reply within the hour
Emergency Bock failure, dry-dock overhaul, or a long-term pipeline — send your engine and part, and a founding partner replies on WhatsApp, usually within the hour. Genuine, OEM, used or reconditioned.
Wattmare — Bhavnagar, Gujarat, India, beside the Alang ship-recycling yard. Genuine, OEM & reconditioned Bock-Bock spares, worldwide in 24–48 hours.
