A Series Engine Water Pump - Large Impeller GWP134EVO

Red Watch

A Series Engine Water Pump - Large Impeller  GWP134EVO

Large impeller version of the A series water pump GWP134.

Uprated, with Glass filled Plastic Impeller. (not pressed steel)

Suitable for 1275cc A series engines and some 1098cc engines

Can also be fitted to 848cc & 998cc engines but may require a thicker gasket and/ or some slight modification to the impeller

3 YEAR GUARANTEE-UK made.

Large impeller higher capacity water pump with a high quality die cast body. 

Fitted with a PPS, glass filled plastic impeller as used by Aston Martin and Jaguar it reduces weight on the bearing loading and has a triple lip seal giving a better controlled flow rate through the rev range.

The pump is about 130 grams lighter and has the rolled edge gasket facing evolved by Rover for better sealing.  GWP134EVO has by-pass hose take off point.

These water pumps have a much larger impeller, it sticks into the block very slightly more than 1/2"(14.03mm).

This water pump will fit all 1275cc blocks and all small bore blocks, with the exception of early 850/997cc units.  These early blocks will need an amount of modification, relieving corrosion and slight material from the liner wall and impeller if required should enable clearance.  try spinning pump loosely fitted without gasket for clearance. It is necessary to check clearance between the large pulley and the head, if a lot of material has been machined from the head face it may foul the pulley. Small bore engines with 12G940 heads can't use the Larger Pulley CAM6408 and it is necessary to modify the top edge of the high capacity water pump or the 12G940 head will rest on the pump and not seal properly. (Modify for at least a 1/16" gap. Use SH605101 Bolts x 2 and BH605151 x2 bolts.

The gasket mating face is the raised rounded type as per Airtex and Rover originals on their alloy body pumps.

If you are unsure, it is wise to put the pump in position and turn by hand to ensure that there is no fouling, before fitting in place permanently.

Austin

Morris

MG

Wolseley 1100  1300

Classic Mini

Allegro

Marina

Riley

Kestrel