Cylinder Head Bolt 04151904 – Verified Fitment for Deutz BF4L913

Cross-Reference Verified — Each 04151904 bolt is traced against engine serial range and superseded references before dispatch.

Technical Specifications

Application Suitability

Why the Same Cylinder Head Bolt 04151904 Number Ships in Multiple Variants

The base part number does not guarantee fitment across every 912/913 engine variant.

I have seen a complete head gasket job on a BF6L912 at a Chilean copper mine shut down because the bolt set ordered under 04151904 had a thread pitch deviation from what that specific engine serial range required. The engine was already torn down. The crew had to wait for replacement fasteners while the block sat exposed. [NEED_CITE: Deutz 912 and 913 series engine serial range identification practices] Cross-reference tables copied between aftermarket sellers often carry forward errors or omit superseded numbers entirely, leaving the buyer with a fastener that threads in but does not clamp the head correctly.

Application Suitability

Serial Range Coverage Across the 912 and 913 Family

The Deutz 912 and 913 engine families share architectural similarities but diverge in fastener specifications across production years. A Cylinder Head Bolt 04151904 ordered for an F3L912 may differ in overall length or thread specification from one destined for a BF6L913. Our fitment verification starts with the engine model and serial number, not the number alone.

Interface and Thread Specification Checks

Thread pitch, overall length, and head marking must all match the removed bolt. The 912/913 series saw running changes in fastener specification across production batches. Before committing to a full overhaul set, we recommend comparing the replacement bolt against the original on thread gauge and length. Port position and head pattern remain consistent, but the bolt variant itself can shift within the same engine family [NEED_CITE: fastener specification changes across Deutz 912 913 production runs].

Torque and Material Behavior Under Thermal Cycling

These engines operate under significant thermal load, particularly in mining and generator applications where duty cycles run continuous. The bolt must maintain clamp force through repeated heat expansion and contraction of the cylinder head. Material grade and heat treatment determine whether the fastener retains torque or relaxes over time. ISO-certified production ensures the Cylinder Head Bolt 04151904 meets dimensional and mechanical property requirements documented on the quality inspection record.

The Cost of a Bolt That Threads but Does Not Clamp

A fastener that passes visual inspection but carries a slight thread tolerance deviation will torque to spec on the wrench. Under operating temperature, the clamp load relaxes unevenly across the head. The result is a blown head gasket, coolant or compression leak, and a second teardown. In field conditions, that second teardown often costs more than the first because the gasket surface must be re-inspected and additional components replaced. [NEED_CITE: cylinder head bolt clamp load relaxation causes in diesel engines]

Why Source This Fastener Through Our Account

Selected fastener lines are produced in our own facility, with the remainder sourced from ISO-certified manufacturing partners. Both carry the same quality control and warranty terms. We verify cross-reference numbers including superseded references such as 4151904 and 2101681 (cross-reference only) against current production specifications. A sample piece ships for physical fitment confirmation before full-quantity commitment. Our technical team confirms bolt variant against engine serial number and build sheet. Single-piece orders are accepted for emergency single-cylinder repairs. Guangzhou warehouse stock enables fast dispatch on common 912/913 fastener configurations.

Documentation & Verification

• Commercial invoice listing each bolt variant and quantity per engine serial number
• Cross-reference sheet mapping 04151904, 4151904, and 2101681 as reference only
• Dimensional inspection record covering thread pitch, length, and head marking
• Warranty terms covering manufacturing defects for 3–12 months
• Packing photographs showing bolt set arrangement and labeling before crate closure
• HS code and customs documentation for cross-border fastener shipment

Fitment Check Before Installation

• Compare thread pitch of each replacement Cylinder Head Bolt 04151904 against the removed original using a thread gauge
• Measure overall length and shank diameter against engine manufacturer specification sheet
• Verify head marking matches the torque grade required for your specific Deutz engine variant
• Trial-fit one bolt into the block before installing the full set to confirm thread engagement
• If any bolt resists hand-threading, stop and contact us for cross-reference re-verification
• Confirm bolt set quantity matches the cylinder head pattern for your specific engine model

Request Fitment Confirmation Before You Order

Send us the engine model, serial number, and a photograph of the existing bolt or nameplate. We will cross-reference the part number against the Deutz 912/913 series build data and confirm which variant fits your specific engine before any commitment is made.

Frequently Asked Questions

Q: How do I confirm this bolt fits my specific Deutz engine serial number? A: Provide the full engine model and serial number from the nameplate. We cross-reference it against the Deutz 912/913 series build data to confirm the correct bolt variant, including length and thread pitch. Serial ranges can shift specification within the same base number, so the serial number is essential for accurate fitment verification.

Q: My old bolt shows a different number — is 04151904 still the correct replacement? A: Deutz has superseded and reassigned fastener numbers across 912/913 production years. Numbers such as 4151904 or 2101681 may appear on original bolts (cross-reference only). Send us a photo of the old bolt head marking and thread detail. We trace the supersession chain to confirm whether 04151904 is the valid current replacement for your engine serial range.

Q: Why do some listings show 4151904 and others show 2101681 for the same application? A: These are alternate or superseded references that different sellers have carried forward from older catalogues (reference only). The correct number depends on your engine's production batch and serial range. We verify each alternate number against current specification to confirm which maps to the bolt your engine actually requires.

Q: I only have the engine model, no readable part number — can you identify the right bolt? A: Yes. Send the engine model and any visible serial information from the nameplate or block casting. We use the Deutz 912/913 series parts documentation to narrow down the correct bolt variant. If the nameplate is worn, a photograph of the existing bolt alongside a ruler or thread gauge helps us confirm specification.

Q: Can I order one sample bolt to test fit before buying the full set? A: Yes, single-piece orders are accepted. We recommend ordering one Cylinder Head Bolt 04151904 sample to confirm thread engagement, length, and head seating on your specific engine before committing to the full overhaul quantity. This eliminates the risk of a complete set arriving with a variant mismatch.