ENGINE PARTS ENQUIRY CHECKLIST
Start with the engine reference, then match the exact part using a drawing, OEM reference or sample. Guides and seats are quoted per piece, with intake/exhaust and model quantities confirmed separately.
For valve guides and valve seat inserts, the first sample is free when you provide a drawing. Send your drawing and requirements to Taylor Yang to confirm the specification, sample quantity and delivery arrangements. Freight, tooling, development and any other charges are confirmed separately before proceeding.
Send your drawing & requirements ↗Provide the full engine variant, vehicle or equipment information, intake/exhaust position and OEM/OE reference. Similar engine names or different cylinder-head configurations do not establish universal interchangeability.
Valve guides: outer diameter, inner diameter, overall length, steps or grooves, and tolerances. Seat inserts: outer diameter, inner diameter, height, seating geometry and tolerances. For standard or oversize parts, identify the exact dimension and value. Do not estimate dimensions from a photograph.
Options for discussion include powder metallurgy seats, alloy cast iron seats and alloy cast iron guides. Agree the exact material grade, hardness, treatment and inspection requirements in the drawing or quotation rather than using quality-tier labels alone. If cryogenic treatment is required, define the applicable parts and process requirements; it is not a guarantee against all distortion or seat movement.
Guides and seat inserts are sold per piece, not per dozen. List guide and seat quantities for each 2L, 3L and 5L application, including intake/exhaust splits. MOQ, volume pricing and lead time are quoted against the confirmed specification and quantities.
Confirm the drawing and sample evaluation method, including dimensional and material checks. Review the sample results and written specifications before batch production. Packaging, transport and other charges are confirmed separately.
| Part | Engine / variant | Intake / exhaust | OEM / drawing | Dimensions / tolerance | Material | Quantity |
|---|---|---|---|---|---|---|
| Guide / seat insert | 2L / 3L / 5L | Please specify | Please supply | Please supply | Please specify | Split by model |
This is an enquiry checklist, not proof of fitment for a specific OEM part or a public price commitment. FarDrive is an independent sourcing representative, not Toyota or an authorized Toyota representative.
View actual valve guide samples · Valve seat insert sourcing