Clutch release bearing
MG: MGB (1962-80) ? MGB V8 when utilise the original 4 synchro gearbox from the 4 cylinder MGB ? MGC (1967-69)
Jaguar: XK120, XK140 and XK150 (1949-61) ? E-Type 3.8 Series 1 (1961-64) ? Mark II: 3.4 to engine no. KJ8236 and all 3.4 with KG or KH engine, 3.8 to engine no. LE2980 and all 3.8er with LA, LB or LC engine ? S-Type: 3.4 to engine no. 7B6571, 3.8 to engine no. 7B60390 ? Mk7, Mk8 and Mk9 (1950-61) ? Mk10 3.8 (1961-64) ? Daimler Dart SP250 (1959-64)
Sunbeam: Alpine Series IV from chassis no. B94100001 (September 1964) and all Series V (1965-68)
improved roller type
Carbon plain bearings are designed to be suitable for brief contact with the clutch release plate (e.g., when shifting gears), but they wear very quickly with prolonged, continuous contact.
As an improvement, we recommend converting to a ball-bearing clutch release bearing. Ball bearings are designed to withstand prolonged contact with the clutch and are therefore unlikely to fail if the driver keeps their foot on the clutch pedal for extended periods.