0299976748 O-Ring. Listed in MTU 4000 catalog references; confirm installation and current availability before ordering.
Check 0299976748 availability: Start with 0299976748 and the quantity. Add an engine serial number or a photo of the old O-Ring if available; we will follow up on any missing details.
0299976748 Specification
About 0299976748 - O-Ring
Published catalog details are identification references. They do not establish current stock, supplied condition, or confirmed fitment for your engine.
0299976748 is an O-ring catalogued for MTU 4000 engines. Catalog history lists X59499101669 as its later number; we check whether the later part can be fitted alone or needs related parts changed with it. The catalog unit weight is 0.014 kg, which we use to estimate freight before quoting.
Technical Notes: Gaskets and seals
Gaskets, O-rings, and sealing rings keep oil, coolant, fuel, charge air, and exhaust gas in their own circuits. On high-speed MTU engines they work against high combustion pressures and frequent thermal cycling, so a seal that looks intact can still have lost its elasticity or set to the shape of the old joint.
When This Type of Part Is Usually Replaced
- a joint has been opened for inspection or repair, even if the old seal looks usable
- oil or coolant weeping appears at a cover, pipe flange, or housing
- a coolant test shows oil contamination or combustion gas in the cooling system
Checks Before Ordering
- Material matters: fuel-system and coolant-system O-rings of the same size can use different elastomers
- Superseded gasket numbers often reflect a material or thickness change, so mixed old and new gaskets on one joint should be avoided
- Order the complete set for a joint rather than single pieces when the cover or head comes off
Engine Catalog References
0299976748 is listed for 11 engine models in the catalog references. The specification table decodes each model code from the fitment list; it does not confirm every installation.
| Model | Cylinders | Arrangement | Application | Group / build |
|---|---|---|---|---|
| 8V 4000 M63 | 8 | V | marine | subgroup 6, build 3 |
| 12V 4000 M63 | 12 | V | marine | subgroup 6, build 3 |
| 12V 4000 M65L | 12 | V | marine | subgroup 6, build 5 |
| 16V 4000 M63L | 16 | V | marine | subgroup 6, build 3 |
| 16V 4000 M65L | 16 | V | marine | subgroup 6, build 5 |
| 8V 4000 M54R | 8 | V | marine | subgroup 5, build 4 |
| 8V 4000 M54 | 8 | V | marine | subgroup 5, build 4 |
| 8V 4000 M53 | 8 | V | marine | subgroup 5, build 3 |
| 12V 4000 M55R | 12 | V | marine | subgroup 5, build 5 |
| 12V 4000 M53R | 12 | V | marine | subgroup 5, build 3 |
| 12V 4000 M54 | 12 | V | marine | subgroup 5, build 4 |
How Each Model Code Reads
- 8V 4000 M63: 8 cylinders in V arrangement, Series 4000, marine application (M), subgroup 6, build generation 3
- 12V 4000 M63: 12 cylinders in V arrangement, Series 4000, marine application (M), subgroup 6, build generation 3
- 12V 4000 M65L: 12 cylinders in V arrangement, Series 4000, marine application (M), subgroup 6, build generation 5, increased rating (L)
- 16V 4000 M63L: 16 cylinders in V arrangement, Series 4000, marine application (M), subgroup 6, build generation 3, increased rating (L)
- 16V 4000 M65L: 16 cylinders in V arrangement, Series 4000, marine application (M), subgroup 6, build generation 5, increased rating (L)
- 8V 4000 M54R: 8 cylinders in V arrangement, Series 4000, marine application (M), subgroup 5, build generation 4, rating variant R
- 8V 4000 M54: 8 cylinders in V arrangement, Series 4000, marine application (M), subgroup 5, build generation 4
- 8V 4000 M53: 8 cylinders in V arrangement, Series 4000, marine application (M), subgroup 5, build generation 3
- 12V 4000 M55R: 12 cylinders in V arrangement, Series 4000, marine application (M), subgroup 5, build generation 5, rating variant R
- 12V 4000 M53R: 12 cylinders in V arrangement, Series 4000, marine application (M), subgroup 5, build generation 3, rating variant R
- 12V 4000 M54: 12 cylinders in V arrangement, Series 4000, marine application (M), subgroup 5, build generation 4
Full parts list for these engines: MTU 8V 4000 M63 Parts List, MTU 4000 M53 to M65L Parts List
Engine-series references do not confirm every installation. Final fitment of 0299976748 depends on the full engine serial number and assembly position.
Cross-Reference and Superseded Part Numbers
Catalog history distinguishes earlier and later numbers where documented. Reference-only entries do not establish replacement direction or interchangeability. Confirm the offered number against the engine serial number and installation.
| Part number | Catalog relationship |
|---|---|
| X59499101669 | Listed later number |
| 0249974748 | Reference only; direction unconfirmed |
| 735252184000 | Reference only; direction unconfirmed |
Common Applications
- Overhaul kits
- Marine service
- Industrial maintenance
- Generator repair
Information to Send for Quotation
- Part number: 0299976748
- Engine model, rating, and serial number
- Nameplate photo and old part photo when available
- Quantity, destination country, and required delivery date
The quotation confirms the offered part number, supply condition, price, lead time, and shipping options.
0299976748 FAQ
What replaces 0299976748?
Catalog history lists X59499101669 as the later number. We check whether X59499101669 can be fitted on its own or needs related parts changed, and quote 0299976748 where it is still available and preferred.
Verification Notes
- For 0299976748, confirm engine model, serial number, required quantity, and destination before ordering.
- If 0299976748 markings or replacement status are unclear, send old-part photos or nameplate details.
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