Model: 4M10G88
Part Number: 1004934487
Brands: Baudouin
Engine Model: 4M10G88
Engine Type: Marine and industrial diesel
Scope of application: marine propulsion, marine auxiliary, generator sets
A diesel piston absorbs heat at the crown, transfers most of it through the rings and liner, and must keep its ring grooves in shape while doing so. Part 1004934487 is the piston for the Baudouin 4M10G88 rating, with a cooling gallery fed by an oil jet under the crown.
Marine duty puts a piston under steady thermal load for hours at a time. That is different from a truck, where load varies and the engine cools between pulls. Steady heat means crown temperature stays high, and the piston relies on oil flow through the gallery more than on any transient cooling.
The 4M10G range shares many parts, but the pistons differ between ratings in bowl shape and compression ratio. Fitting a G70 or G110 piston changes combustion and produces smoke, poor economy and higher exhaust temperature, and no injector adjustment can correct the chamber geometry.
Pistons ship wrapped and protected. Complete assemblies with rings fitted are available on request.
Read the evidence before ordering parts. Replacing a piston without fixing the cause produces the same failure within a few hundred hours.
Before fitting new pistons, check every cooling jet for flow and confirm the correct nozzle is installed. A blocked jet overheats the crown and can melt the bowl edge. Check the pin bore together with the small end bush; if the pin rocks visibly, the piston is worn.
The bowl shapes how fuel and air mix. Two pistons with the same diameter but different bowls both fit the bore, but only one matches the injector spray pattern and calibration. Compare the old crown with the new one before assembly, and confirm with the part number.
Run at varying load, increasing gradually over the first hours, and change oil early. Holding full load immediately glazes the bores and leaves the rings unseated. Break-in is usually completed within the first twenty to fifty hours.
Marine fuel quality varies widely, and poor fuel raises crown temperature and accelerates carbon build-up. Keep fuel filters changed and injectors serviced at the recommended hours. A leaking injector washes the bore and dilutes the oil, and the resulting wear is far more expensive than the service.
Correct injection timing, clean fuel and adequate cooling keep pistons alive. Keep the cooling jets clear, maintain the heat exchanger and never run with a failed turbo passing oil into the intake.
Pistons are supplied wrapped because a bare crown and skirt corrode quickly in a humid engine room. Keep them in their packaging until the block and liners are ready. Dropping a piston, even from a low height, can distort the skirt or crack a ring land, and the damage is not always visible.
Store pistons upright, not stacked on their crowns, and keep the pin and circlips with the piston they belong to. Mixing pins between pistons is a common cause of unexplained noise after a rebuild, because pin bores are matched during manufacture.
Before fitting, wipe the protective coating off with a clean cloth. Do not use solvent on the skirt, because the coating is part of the running surface on some designs.
Measure the liner bore and check for a ridge at the top of ring travel before fitting a new piston. A worn bore will not seal new rings, and a piston that runs in an oval bore scuffs on one side within a few hundred hours. The liner and piston should always be assessed together rather than as separate parts.
No. Each rating uses its own piston. Ask us for the matching part.
It is supplied bare by default. Complete assemblies are available.
Yes. Use pistons from the same weight class within one engine.
Over-fuelling, incorrect timing or a blocked cooling jet.
Browse the Baudouin piston and components category, and pair the piston with the 4M10G88 overhaul kit 1004934489 or the 4M10G cylinder liner 1000156635.
Baudouin 4M10G88 Piston (1004934487). This piston carries the combustion load and forms half of the combustion chamber. Its crown profile is matched to the rating, not just to the bore diameter.
Compare the old piston crown with the new one. Two pistons can share a diameter and differ in bowl shape, compression height or groove width, and a wrong bowl produces smoke with no other symptom.
Numbers beginning 1004 are numeric-series numbers used on later WP7 and WP8 production, where mounting detail changed without a change of nominal type. On this engine, confirm the 4M10G88 application against the engine plate before ordering.
Clean the ring grooves to bare metal before fitting new rings. Carbon at the bottom of a groove holds the ring proud and produces the same blow-by as a worn bore.
Ordering note. For fleet customers, a consolidated stock list can be quoted against the engine plates in service, which usually exposes duplicated part numbers across similar units.
Related reading: Piston Ring Selection: Gap, Tension and Bore Condition
| We Are 30 Years Diesel Engine Parts Supplier | |
| Brand | EPID |
| Warranty | 12 Months |
| Condition | 100%New |
| More Models | Weichai: 4M10G88, and other Weichai series. |
| Shipping | By sea / air / express (DHL, FEDEX, TNT, UPS, EMS) |
| Packing | Standard exporting packing or as required |
| Payment Term | L/C, T/T, Western Union, Trade Assurance |
| Delivery Time | 3-7 days (depend on order) |
| Selling Point | 1. On-time Delivery 2. Genuine Quality Assurance 3. Professional Supplier |
Pistons ship wrapped and protected. Complete assemblies with rings fitted are available on request.
Read the evidence before ordering parts. Replacing a piston without fixing the cause produces the same failure within a few hundred hours.
Before fitting new pistons, check every cooling jet for flow and confirm the correct nozzle is installed. A blocked jet overheats the crown and can melt the bowl edge. Check the pin bore together with the small end bush; if the pin rocks visibly, the piston is worn.
The bowl shapes how fuel and air mix. Two pistons with the same diameter but different bowls both fit the bore, but only one matches the injector spray pattern and calibration. Compare the old crown with the new one before assembly, and confirm with the part number.
Run at varying load, increasing gradually over the first hours, and change oil early. Holding full load immediately glazes the bores and leaves the rings unseated. Break-in is usually completed within the first twenty to fifty hours.
Marine fuel quality varies widely, and poor fuel raises crown temperature and accelerates carbon build-up. Keep fuel filters changed and injectors serviced at the recommended hours. A leaking injector washes the bore and dilutes the oil, and the resulting wear is far more expensive than the service.
Correct injection timing, clean fuel and adequate cooling keep pistons alive. Keep the cooling jets clear, maintain the heat exchanger and never run with a failed turbo passing oil into the intake.
Pistons are supplied wrapped because a bare crown and skirt corrode quickly in a humid engine room. Keep them in their packaging until the block and liners are ready. Dropping a piston, even from a low height, can distort the skirt or crack a ring land, and the damage is not always visible.
Store pistons upright, not stacked on their crowns, and keep the pin and circlips with the piston they belong to. Mixing pins between pistons is a common cause of unexplained noise after a rebuild, because pin bores are matched during manufacture.
Before fitting, wipe the protective coating off with a clean cloth. Do not use solvent on the skirt, because the coating is part of the running surface on some designs.
Measure the liner bore and check for a ridge at the top of ring travel before fitting a new piston. A worn bore will not seal new rings, and a piston that runs in an oval bore scuffs on one side within a few hundred hours. The liner and piston should always be assessed together rather than as separate parts.
Browse the Baudouin piston and components category, and pair the piston with the 4M10G88 overhaul kit 1004934489 or the 4M10G cylinder liner 1000156635.
No. Each rating uses its own piston. Ask us for the matching part.
It is supplied bare by default. Complete assemblies are available.
Yes. Use pistons from the same weight class within one engine.
Over-fuelling, incorrect timing or a blocked cooling jet.
EPID supplies diesel engine parts for Weichai, Baudouin, Yuchai, Caterpillar, Sinotruk, FAW Xichai and Cummins engines. Every order is checked against the original part number before packing, and our team can identify a part from a photo of the engine plate. Ask for a quotation with your model and quantity and we will reply within one working day.
