Previously known as 88G618. Found on Morris Minor, Sprites Mk 1-4 & Midgets Mk1-3 and Mini (1959 to 2000). This is the longer type cylinder head adaptor tube which allows fitment of the by pass hose without removing the head. The shortened rubber hose (see GZA2086 or GZA2083K ribbed) slides up the tube and then back down on the water pump tube. Frequently rusted on old heads and missing on newer heads.
5/8"uns x 16tpi "whitworth fine" thread and if the thread in the head is badly corroded and you cannot find the correct original tap some owners have retapped to 5/8" x 18tpi unf and fitted 12H1405.
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