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Technical Specification
PRODUCT NUMBER 3140537031420970314216703142177031421870
Type AdaptorAdaptorAdaptorAdaptorAdaptor
Thread M14M9

Q 1. What is the 31421570V2 glowplug adaptor for?

A. It is an M8 x 1.0 glowplug adaptor for diesel compression testing on Audi, Chrysler, Seat, Skoda and Volkswagen vehicles.

Q 2. Why is a dedicated glowplug adaptor necessary?

A. Each engine family uses specific glowplug threads; correct adaptors ensure testers seal properly.

Q 3. When would technicians use this adaptor?

A. When performing compression tests on engines using M8 x 1.0 glowplug threads.

Q 4. Why is correct thread engagement important?

A. Proper thread matching prevents cylinder head damage and ensures leak‑free compression readings.

Q 5. How should technicians prepare the adaptor?

A. Inspect threads, apply light oil and ensure the sealing surface is clean.

Q 6. Can this adaptor fit older SP compression kits?

A. It fits 314 Series kits unless otherwise stated in older model notes.

Q 7. What engines commonly use this adaptor?

A. Audi, VW Group and certain Chrysler diesel engines with M8 x 1.0 glowplug ports.

Q 8. How should it be stored?

A. Keep it in labelled compression tester compartments with other glowplug adaptors.

Q 9. What should be avoided during use?

A. Avoid overtightening to prevent stripping threads in the cylinder head.

Q 10. What search terms match this adaptor?

A. “31421570V2 M8 glowplug adaptor VW Group” or similar."

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