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675389C1

Valve cover gasket, D-312 and D-360 diesel engines for International Harvester 766 and 666

Original part (OEM)

No longer available

Status from the manufacturer or dealer lookup. R1 Checked Oct 27, 2026.

PorkForge replacement

Not made yet

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Part facts

Original part number
675389C1R1
System
Engine and fuel
Notes
Valve cover gasket for the IH D-312 and D-360 diesels (the 300-series engine family), used in tractors such as the 666 and 766. In November 2020 a Red Power member's tractor dealer said it was no longer available, although other parts for the engine still were. Members found it through IH truck and Navistar parts channels instead, one at $20 CAD each. It seals hot oil, so it is not eligible for printing; the record tracks NLA status.
Last reviewed
Oct 27, 2026 · record pf-ih-0023

Dimensions How to measure this part

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Fits these machines

Model Years Notes Evidence
International Harvester 766 Not recorded The original poster's tractor. Reported 1
International Harvester 666 Not recorded A member bought the gasket around 2018 for his 666. Reported 1

Check against your machine’s serial number before ordering.

Where to find one today

We have not found one listed for sale yet.

Why it is hard to get

  • No longer available: Nov 2020: tractor dealer said 675389C1 is no longer available from them; members got it from an IH truck shop and a truck parts supplier ($20 CAD each). 1

Can this part be made again?

Not eligiblePhysical replacement

Engine sealing part exposed to heat and hot oil; excluded under the brief's manufacturing rules.

Not eligibleSTL / FreeCAD file

We will not offer files for this part.

Sources

  1. Red Power Magazine forum: valve cover gasket NLA for D312/360? (2020) forum · checked Oct 27, 2026

Not affiliated with or endorsed by International Harvester or its successors. The name is used only to identify compatibility. Part numbers are shown for reference. Check fit against your own machine. Spot a mistake?

Verification checklist (4 of 8 met)
  • ✕ OEM part number not yet verified from an OEM or dealer source
  • ✕ Cited by one website only, and not an OEM or dealer source
  • ✓ At least one compatible model with a source
  • ✕ 1 kinds of fact beyond the name (original availability); 3 needed
  • ✓ Original availability checked 2026-10-27
  • ✓ Text and title are distinct
  • ✓ No editorial hold
  • ✕ Not yet reviewed and signed off for search

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675389C1
Original: no longer available
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