water leak new pump

I clearly had a water leak, but with coolant catching the fan is was splattered all over and impossible to trace. I found it eventually by pressurising the header tank, thanks to a little hand pump that I had inherited from Rich. It was from the water pump. So new water pump:

Parts:


  • Pump 500361919 (Iveco £167+ )
  • o-ring 14472681 (discontinued)
  •           94.62mm x 5.33mm
  • white tube 4697947 (Iveco £2.64 +)
  • o-rings on white tube x4 17278481 (Iveco £2.64+)
  •           17.17mm x 1.78mm
  • circlip on white tube x 2 11066976 (Iveco poa)
  • Gasket for rear pipe 9843478 (about £1)
  • New jubilee clips for water hoses 
  • Antifreeze (Red 5ltr £9.99 eurocarparts)
The pump included the studs but not the o-ring seal. The large o-ring is discontinued by Iveco. available on line ????
The white plastic tube becomes brittle, and as predicted, it broke during disassembly.

Order of Work

Front Grill off
Radiator out
Remove fanbelt and fan
Removal and reassembly is difficult with the thermostat housing in place so:
Remove timing chain cover.
Crankshaft pulley (do the trick of cranking the engine to loosen the big nut.
Remove pump, breaking the white tube in the process
Remove broken ends of the white tube.


Tips and Tricks

I needed to reuse the big o-ring so I took it off carefully and also used Hylomar blue.
A 13mm spanner is needed to hold the tensionner out of the way for reassembly.
The idea of the white tube is that it slides up and down to make it possible to fit pump or thermostat individually. It is a tight fit. Having the right o-rings is critical. Use lubricant and check that it does move fully up and down.

Problems

I disturbed the thermostat housing and it leaked. Then taking it off to replace the gasket the long bolt broke off. I had to reassemble using 3 of 4 bolts. To help I used gasket goo instead of the paper gasket. Not yet sure if it has sealed up.

 Thermostat parts

These were not needed, but just in case:
Thermostat housing 4828059 (Vexi £48.30 +)
Thermostat top housing 98434023 (Vexi £20.54+)
Thermostat itself - with seals 98463637 (vexi £26.06 +)
Gasket 98421297
Bolts M8 lengths 85mm 30mm, 30mm and 35mm




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