- The weep hole protects bearings from corrosion damage by preventing seepage of coolant into the pump body.
- In normal operation, traces of dried coolant may be visible around the hole. Coolant leak may be occurring if there is fluid around the weep hole or if the reservoir tank reaches low coolant levels within about a month.
Cause(s) :
- Contamination and sludge has damaged the mechanical seal, reducing sealing performance.
Cure(s) :
- Before installing the new water pump, flush the cooling system 2 - 3 times and let engine idle for about 3 minutes with the old pump to remove any sludge deposit.
- Replace the anti-freeze regularly at the specified mixture and fluid level.
- Do not use sealants (RTV) when gaskets are supplied.
- When sealants are necessary, apply evenly and do not allow excess to enter the water channel.
Water pump 
