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Views: 0 Author: Site Editor Publish Time: 05-27-2026 Origin: Site
Introduction
In DAF XF and CF heavy-duty trucks, the front engine mount 676331 (also listed as 0676331) is the critical interface between the PACCAR MX-11 / MX-13 powertrain and the chassis frame. It directly determines engine vibration isolation, in-cab NVH performance, and driver comfort.
A worn or cracked mount triggers engine knocking, accelerates drivetrain wear, and compromises road safety. Sourcing an OEM-equivalent DAF 676331 engine mounting is therefore essential for fleet uptime and total cost of ownership.
Technical Deep-Dive — DAF 676331 Front Engine Mount
1. Vehicle Application
OEM 676331 fits DAF XF95, XF105, XF106, and selected CF85 trucks, mounted at the front of the engine (left/right side per chassis configuration). It is engineered for PACCAR MX-11 (10.8L) and MX-13 (12.9L) inline-6 diesel engines.
2. Structural Design
The mount uses a “rubber + steel bracket” bonded architecture:
• Steel bracket: Q235 carbon steel, stamped and formed, with phosphate + e-coat / powder coating, passing 720-hour neutral salt spray testing.
• Rubber element: NR/SBR blend, Shore A 55±5 HA, hot-vulcanized to the bracket at 200°C with peel strength ≥7 N/mm.
• Behavior: Low dynamic stiffness change and minimal hysteresis angle shift under low-frequency, high-amplitude excitation; strong resistance to dynamic stiffening under high-frequency, low-amplitude excitation — making it ideal for damping engine start-stop reversal impacts.
3. Performance Highlights
• Dynamic-to-static stiffness ratio: 1.3–1.6, balancing support rigidity with isolation.
• Fatigue life: >1,000,000 cycles at ±5 mm displacement / 3 Hz without crack initiation.
• Operating temperature: -40°C to +120°C — covering Nordic winters and Mediterranean summers.
• Oil & aging resistance: Resistant to engine oil, coolant, and diesel splash; hardness change ≤±5 HA after 70°C × 72h hot-air aging.
Frequently Asked Questions (FAQ)
Q1: Are 676331 and 0676331 the same part?
Yes. 676331 is the PACCAR/DAF root OEM number; “0676331” is the leading-zero format used in certain catalogs. The physical part is identical.
Q2: Which DAF trucks does this mount actually fit?
Primarily DAF XF95, XF105, XF106, and select CF85 trucks at the front engine mounting position. Always cross-check with the truck VIN or the original part on hand.
Q3: How does aftermarket OEM quality compare to genuine DAF parts?
Our production runs under IATF 16949 automotive standards. Rubber formulation and vulcanization curves are benchmarked against genuine, with steel bracket tolerance held at ±0.3 mm. Multiple European distributors have used our mounts for 5+ years with service life on par with genuine DAF parts.
Q4: What are the warning signs of a failing engine mount?
Typical symptoms include abnormal steering-wheel vibration at idle, metallic clunking under acceleration or gear-shift, visible oil traces under the engine bay (cracked rubber leaking oil), and noticeable cabin noise increase on long hauls.
Q5: Does rubber cracking always mean replacement?
Surface micro-cracks can be tolerated short-term, but once cracks penetrate to the metal bonding layer or the mount sags more than 3 mm in height, immediate replacement is mandatory to prevent total failure and engine misalignment.
Q6: What is the recommended replacement interval?
Every 300,000–500,000 km under normal duty; reduce to 250,000 km for heavy-load, mountainous routes, or stop-and-go operations. Always replace both sides together to maintain balanced load distribution.
Q7: Do you accept trial orders? What is your MOQ?
Yes. Standard MOQ is 50 pieces. For SKUs held in our European warehouse, trial orders start from 10 pieces — ideal for distributors wanting to validate quality before bulk reorder.
Q8: How are the mounts packaged and shipped?
Each mount in a neutral inner box with bubble wrap, 20–30 pieces per 5-ply corrugated carton. We support FOB Tianjin, CIF major EU/US ports, and DDP delivery to overseas warehouses.
Q9: Can you offer OEM/ODM branding?
Yes. Neutral packaging, custom logo printing, color boxes, and barcode labels are all available. AI artwork required; sampling lead time is 7–10 days.
Q10: What warranty do you provide?
12 months or 150,000 km from delivery, whichever comes first. For failures not caused by installation error, we replace defective units free of charge upon return of the sample.
