X52499100259 Adjusting Screw. Listed in MTU 4000 catalog references; confirm installation and current availability before ordering.
Check X52499100259 availability: Start with X52499100259 and the quantity. Add an engine serial number or a photo of the old Adjusting Screw if available; we will follow up on any missing details.
X52499100259 Specification
About X52499100259 - Adjusting Screw
Published catalog details are identification references. They do not establish current stock, supplied condition, or confirmed fitment for your engine.
X52499100259 is an adjusting screw catalogued for MTU 4000 engines. The catalog unit weight is 0.071 kg, which we use to estimate freight before quoting.
Technical Notes: Valve train
Valves, guides, seats, springs, and rocker components control gas exchange in the cylinder head. Wear in the valve train shows up as compression loss, rising exhaust temperatures, or changes in valve clearance between service intervals.
When This Type of Part Is Usually Replaced
- valve clearance changes quickly between adjustments
- compression is low on one or more cylinders
- valves or seats show burning, pitting, or recession during head overhaul
Checks Before Ordering
- Valve guides and seats are matched to the valve stem and head; order them per cylinder head
- Replace valve stem seals whenever valves are removed
- Inner and outer valve springs are usually separate part numbers
Engine Catalog References
X52499100259 is listed for 12 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 R43 | 8 | V | rail | subgroup 4, build 3 |
| 8V 4000 R43L | 8 | V | rail | subgroup 4, build 3 |
| 12V 4000 R43 | 12 | V | rail | subgroup 4, build 3 |
| 12V 4000 R43L | 12 | V | rail | subgroup 4, build 3 |
| 16V 4000 R43R | 16 | V | rail | subgroup 4, build 3 |
| 16V 4000 R43 | 16 | V | rail | subgroup 4, build 3 |
| 16V 4000 R43L | 16 | V | rail | subgroup 4, build 3 |
| 20V 4000 R43 | 20 | V | rail | subgroup 4, build 3 |
| 20V 4000 R43L | 20 | V | rail | subgroup 4, build 3 |
| 20V 4000 R63R | 20 | V | rail | subgroup 6, build 3 |
| 20V 4000 R63 | 20 | V | rail | subgroup 6, build 3 |
| 20V 4000 R63L | 20 | V | rail | subgroup 6, build 3 |
How Each Model Code Reads
- 8V 4000 R43: 8 cylinders in V arrangement, Series 4000, rail application (R), subgroup 4, build generation 3
- 8V 4000 R43L: 8 cylinders in V arrangement, Series 4000, rail application (R), subgroup 4, build generation 3, increased rating (L)
- 12V 4000 R43: 12 cylinders in V arrangement, Series 4000, rail application (R), subgroup 4, build generation 3
- 12V 4000 R43L: 12 cylinders in V arrangement, Series 4000, rail application (R), subgroup 4, build generation 3, increased rating (L)
- 16V 4000 R43R: 16 cylinders in V arrangement, Series 4000, rail application (R), subgroup 4, build generation 3, rating variant R
- 16V 4000 R43: 16 cylinders in V arrangement, Series 4000, rail application (R), subgroup 4, build generation 3
- 16V 4000 R43L: 16 cylinders in V arrangement, Series 4000, rail application (R), subgroup 4, build generation 3, increased rating (L)
- 20V 4000 R43: 20 cylinders in V arrangement, Series 4000, rail application (R), subgroup 4, build generation 3
- 20V 4000 R43L: 20 cylinders in V arrangement, Series 4000, rail application (R), subgroup 4, build generation 3, increased rating (L)
- 20V 4000 R63R: 20 cylinders in V arrangement, Series 4000, rail application (R), subgroup 6, build generation 3, rating variant R
- 20V 4000 R63: 20 cylinders in V arrangement, Series 4000, rail application (R), subgroup 6, build generation 3
- 20V 4000 R63L: 20 cylinders in V arrangement, Series 4000, rail application (R), subgroup 6, build generation 3, increased rating (L)
Full parts list for this model family: MTU 4000 R43 to R63R Parts List
Engine-series references do not confirm every installation. Final fitment of X52499100259 depends on the full engine serial number and assembly position.
Common Replacement Scenarios
This part is commonly replaced when:
- compression loss, valve-seat wear, or abnormal exhaust temperature is found
- cylinder-head overhaul requires matched valves, guides, springs, and collets
- installation position and engine series must be confirmed before dispatch
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 |
|---|---|
| X52499100178 | Reference only; direction unconfirmed |
| X52405500011 | Reference only; direction unconfirmed |
| 5240550320 | Reference only; direction unconfirmed |
Common Applications
- Cylinder-head overhaul
- Marine engine maintenance
- Power generation service
Information to Send for Quotation
- Exact part number: X52499100259
- Part name or assembly position: Adjusting Screw
- Engine model / series: MTU 4000
- Engine serial number from nameplate
- Old-part photo showing number, connector, port, or size marking
- Required quantity and whether partial shipment is acceptable
- Destination country, delivery deadline, and preferred shipping method
The quotation confirms the offered part number, supply condition, price, lead time, and shipping options.
Ordering Notes
For X52499100259, send the engine model, serial number, quantity, old-part photo, and destination country. We will confirm whether the item is OEM, OEM-alternative, reman, or superseded before quotation.
X52499100259 FAQ
Does X52499100259 fit MTU 4000?
X52499100259 Adjusting Screw is checked against MTU 4000. Final fitment depends on the engine serial number, rating, and installation position.
What information is needed to quote X52499100259?
Send the part number, engine model, engine serial number, old-part photo, quantity, destination country, and required delivery date. This lets us confirm stock route, packing, and shipping options.
Can you check alternatives or superseded numbers for X52499100259?
X52499100259 may relate to X52499100178, X52405500011, 5240550320. Final replacement status is checked against the engine serial number before quote.
When is X52499100259 usually replaced?
compression loss, valve-seat wear, or abnormal exhaust temperature is found; cylinder-head overhaul requires matched valves, guides, springs, and collets; installation position and engine series must be confirmed before dispatch.
Verification Notes
- For X52499100259, confirm engine model, serial number, required quantity, and destination before ordering.
- If X52499100259 markings or replacement status are unclear, send old-part photos or nameplate details.
- Priority item: part number, supersession, and export packing details are checked before quote.
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