Opel Movano / Renault Master 2.5 diesel - water pump replacement

[@cone6762]

Did the engine make a rattling noise if revved up?

[@signummotors]

No, sounded and worked absolutely as normal, didn’t seem to have that kind of effect. There was a massive drop in coolant level, so you wouldn’t miss it. Depending on the damage to the water pump, it may make noise if the bearings would collapse even if it would still seal without visible leak, should produce a leak and it would go through weep holes on the pump cover. Unless some idiot blocked them with silicone, as it happened on mine. Check for water in oil, as it can happen.

[@OggyFishingUK]

Perfect timing as I’m attempting this tomorrow. Q? Did you drain the oil after fitting the pump or before?

[@signummotors]

I'd drain it after replacing the pump, as during replacement of the pump you might get some leak into the internals of the engine and it will land in your sump - so I'd complete the pump replacement and after it's sealed (put deionised water in first before coolant - just to test, after all it's the cheaper 50% of the mix...) and it's not leaking - then replace the oil. If your oil isn't full of water, you may run the engine to warm it up and make draining oil easier, I didn't have that comfort, as there was about two litres of coolant in my oil already... Glad I've timed it right! :)

[@abuchand5371]

The bleeding procedure is not correct. First bleed the bleed nipple on the thermostat housing, then the nipple on the top of the pipe .

[@abuchand5371]

​@@signummotorsuld it not be better to do the following.1. Replace new pump. 2. Drain old oil mixed with water . 3. Remove sump cover completly and use a clean rag to wipe the sides with carburettor cleaner. Then wipe again with a clean rag , check sump gasket and put back the sump. New coolant to spec , and new oil , oil filter, . Comments please.