ERR1086 - Oil Pressure Relief Valve Plug
Oil Pressure Relief Valve Plug seals the oil pressure relief valve bore in the cylinder block of the 300Tdi engine.
The plug retains the relief valve spring and piston assembly within their machined bore in the engine block. It must maintain a secure, leak-free seal under sustained oil pressure. Replacement is required if the plug is damaged during disassembly or if oil seepage is observed at that location.
All product codes / identifiers:
ERR1086 ERR1086
Models:
Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Fitment Notes:
DEFENDER 1987-2006 — 2.5L 300 TDi Diesel
DISCOVERY 1 1989-1998 — 2.5L 300 TDi, to VIN (V)MA081992
RANGE ROVER CLASSIC 1992-1994 — 2.5L TDi
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.