T25,T4,G1 Fuel Injector Leak Off Pipe Cap - 1.5D (CK), 1.6D (CS,JX,CR,JK,CY), 1.7D (KY), 1.9D(1X,ABL), 2.4D (AAB,AJA)

This diesel leak-off blanking cap is used to seal the end of the injector leak-off (return) pipe on mechanical diesel engines. It closes the final injector in the return circuit, preventing fuel leaks and air ingress that can cause poor starting, rough idle, or diesel smell in the engine bay.

Over time the original rubber caps harden, crack, or split due to heat and diesel exposure. Replacing tired caps is a simple but important maintenance job that helps keep the fuel system leak-free and properly primed, especially on older VW diesel engines.

This cap is suitable for 1.9–2.4 diesel engines using traditional leak-off hose systems and is a direct replacement for the original fitment.

Quantity & Fitting Notes

• Sold individually

• Fits the end injector only (one required per engine)

• Best practice is to renew all leak-off hoses at the same time

• Push-fit design; ensure the injector nipple is clean before fitting

Related Parts Recommended

• Diesel injector leak-off hose (correct internal diameter)

• Additional blanking caps if servicing multiple engines

• Hose clips (if fitted on your setup)

Vehicle Fitment Summary (Diesel)

Volkswagen Transporter T3 (T25)

• 1.9–2.4 Diesel

Volkswagen Transporter T4

• 1.9–2.4 Diesel

Volkswagen Golf Mk1

• Diesel models

Volkswagen Golf Mk2

• Diesel models

Volkswagen Golf Mk3

• Diesel models

Volkswagen Golf Mk1 Cabriolet

• Diesel models

Volkswagen Caddy Mk1

• Diesel models

Volkswagen Scirocco

• Diesel models

Volkswagen Corrado

• Diesel models