Nissan Patrol Y60 snorkel grille

Air-intake grille for the snorkel head of a Nissan Patrol Y60. This is the second version. My first grille, drawn before I realised it was choking the engine, had a dense honeycomb; this one keeps its outline, frame and mounting tabs but opens the honeycomb up so the intake breathes freely, and its deeper bars are stiffer than the old ones.

Airflow

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The frame rests on the snorkel head, so only the opening inside the frame counts.

¹ Estimated as Cc = 0.63 + 0.37·f³ (f = porosity). These are estimates, not a flow simulation. Pressure loss scales with (pipe area / effective area)², so this grille loses roughly 2.5× less than the old one. A rule of thumb for intake screens is an effective area of 1.5–2× the duct.

Strength

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• Honeycomb bars are 1.6 mm wide but 8 mm deep. In bending that is stiffer than the old grille’s 3 × 5 mm bars (1.6·8² = 102 vs 3·5² = 75), while blocking much less of the opening.
• The frame, the honeycomb, the logo ring and the letters are all 8 mm thick, so the whole grille is one flat, rigid plate.
• The lettering is carried by the honeycomb itself: the grid is shifted half a row so the zigzag between rows runs through every letter.

Fit

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• Plate 144.4 × 103.15 mm (152 mm over the tabs), corners R12.7 — checked on a printed part against the snorkel head.
• Nothing sticks out at the back: the honeycomb is flush with the frame, so the grille goes all the way into the snorkel head.
• Tabs 3.8 × 57 mm, 22 mm high, with a Ø5 hole for the fasteners; outer corners and back edges rounded R1.
• Logo: NISSAN in a 2.5 mm ring Ø72, letters 14 mm high.

Printing

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Print face down (as the file lies), tabs up. No supports needed. Use a 0.4 mm nozzle: 4 perimeters fill a 1.6 mm bar completely. The meshes are checked to be watertight.

Files

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• nissan-patrol-y60-snorkel-grille_3D_model.stl — for printing
• nissan-patrol-y60-snorkel-grille_3D_model.3mf — for printing, clean (no slicer profiles)
• nissan-patrol-y60-snorkel-grille_3D_model.step — solid model for editing

License

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CC BY 4.0 — do whatever you like with it (copy, change, sell), just credit the original author: Eugene Vereshchagin (github.com/eugene-vereshchagin). See LICENSE.md.

Not covered: the NISSAN name and logo are trademarks of Nissan — the license covers the modelled shape, not the trademark; the lettering uses Nissan Opti (fan-made font, personal use only).

Renders

Printing