This Esprit turbo water pump was sent to Lotus Marques from a performance workshop in Melbourne after a rebuild attempt failed.
It would appear the internal components had been purchased from a various suppliers who had no experience of Lotus Esprit water pumps.

A close examination of the pump it has previously been rebuilt without machining the damaged surface adjacent to the impellor blades.
This was remedied by removing the absolute minimum material in a lathe which results in a smooth surface to eliminate possible cavitation.
An attempt had been made to assemble the pump with non-standard components that resulted in a broken impellor.
The impellor was broken by excessive force as the oversize bearing spindle prevented it from being installed.
Looking closely at the old and new bearing spindles it is possible to see the original bearing shaft (which has the external casing removed) is slightly smaller in diameter.
The replacement seal has a non-standard spacer in contact with the thrust face which appears to be an attempt to the correct seal installed height.

The only way to carry out a cost effective repair was to install a non-standard impellor suitably modified to fit the pump.
This modified impellor carries a ceramic thrust washer that significantly extends the service life of the pump.
For quality purposes, the pump is pressurised to 50psi to ensure it does not leak.
Copyright © 2014 Lotus Marques
It would appear the internal components had been purchased from a various suppliers who had no experience of Lotus Esprit water pumps.

A close examination of the pump it has previously been rebuilt without machining the damaged surface adjacent to the impellor blades.
This was remedied by removing the absolute minimum material in a lathe which results in a smooth surface to eliminate possible cavitation.
An attempt had been made to assemble the pump with non-standard components that resulted in a broken impellor.
The impellor was broken by excessive force as the oversize bearing spindle prevented it from being installed.
Looking closely at the old and new bearing spindles it is possible to see the original bearing shaft (which has the external casing removed) is slightly smaller in diameter.
The replacement seal has a non-standard spacer in contact with the thrust face which appears to be an attempt to the correct seal installed height.

The only way to carry out a cost effective repair was to install a non-standard impellor suitably modified to fit the pump.
This modified impellor carries a ceramic thrust washer that significantly extends the service life of the pump.
For quality purposes, the pump is pressurised to 50psi to ensure it does not leak.
Copyright © 2014 Lotus Marques