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MGB water pumps - Which one?

MGB 5 bearing engines had two types of water pump, differing in their length. When ordering replacements, it helps to check which pump type you have, since with the passage of time the original pump may have been changed to another type.

To check the pump type, the later pumps (GWP130) can be identified by the presence of a spacer approx 20-25mm thick between the pulley & the original 3 bladed steel fan, or by the presence of a 7 bladed plastic fan.

The earlier pump (GWP114) fitted before the 18V engine had the steel fan with no spacer and an overall length of close to 4.5” from the mounting face of the fan to the face where the pump mounts onto the block.

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