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ERR3753 - Valve Seat Insert Engine Part Land Rover Range Rover Defender, Discovery, Range Rover

ERR3753 - Zittingring

- €6,70
€6,70
€6,70 - €6,70
€6,70
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Aftermarket Part
Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.
Kleppenzeetelring voor de 2.5L 300TDi turbodieselmotor. Deze wordt in de cilinderkop geperst om de geharde zittingring voor een klep te vormen.

De insert vormt het afdichtingsoppervlak waartegen de klep sluit, waardoor de afdichting van de verbrandingskamer behouden blijft en warmte van de klepkop naar de cilinderkop wordt geleid.
Vehicle Model Land Rover Defender t/m 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic t/m 1994
Fitment Notes DEFENDER 1983-2006 — 2.5L 300TDi
DISCOVERY 1 1989-1998 — 2.5L 300TDi
RANGE ROVER CLASSIC 1992-1994 — 2.5L 300TDi
Alternative Codes
FOUT3753

Available to order 2–3 weeks

Not currently in stock. Order now — typically ships within 2–3 weeks.

Need it faster? Contact us about express import (2–5 business days).

When will my order arrive?

This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.

  • Netherlands / Belgium / Germany: 2–4 working days after dispatch.
  • Other EU countries + UK: 4–8 working days after dispatch.
  • Outside EU/UK: contact us for an estimate.

Need it faster? Express import available in 2–5 business days — contact us before ordering.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What is the ERR3753 valve seat insert and what does it do?
The ERR3753 valve seat insert is a hardened ring pressed into the cylinder head of the 2.5L 300TDi engine. It forms the seating face the valve closes against, sealing the combustion chamber, and conducts heat from the valve head into the head. There's one insert per valve seat.
How many valve seat inserts are needed for a 300TDi head?
Valve seat inserts are sold individually, so you order one per seat being renewed. The 300TDi cylinder head has two valves per cylinder across four cylinders, so a full reseat typically needs up to eight. Order the quantity to match the seats your machine shop is replacing.
Can a valve seat insert be fitted at home?
Valve seat inserts are a specialist machine-shop job, not a home fit. They're an interference fit that's pressed or shrunk into the cylinder head and then cut to match the valve angle, so they need proper tooling. Most builders supply the inserts and have a head shop machine and fit them.
Why would a valve seat insert need replacing?
Valve seat inserts typically need replacing when they're cracked, pitted, recessed or have worked loose in the head, often after overheating or valve damage on the 300TDi. A worn seat stops the valve sealing, causing compression loss and poor running. They're renewed during a cylinder head rebuild.