The Mitsubishi Pajero Owners Club®

perspex · Posted: Thu Apr 23, 2015 10:16 Post subject: water pump replacement

Hi all, just ordered new water pump as I suspect I am getting a little seepage through the bearing seal , any how to,s or not to,s ??

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tom fenton · Posted: Thu Apr 23, 2015 11:13 Post subject:

Simple enough job really. Remove the fan cowl and fan and I think you can do it without removing the rad.

perspex · Posted: Thu Apr 23, 2015 11:21 Post subject:

Cheers tom it comes with new seal , would you also use gasket seal as a precaution? Also is there any torque settings for pump bolts?

peteinchad · Posted: Thu Apr 23, 2015 11:55 Post subject:

The 4M40 manual I have got doesn't give any torque settings for the pump bolts - I just tightened them up with a shortish spanner.

The rubber seal will keep falling out of the groove when you try fitting the new pump into place - after five attempts I held it in the groove with some non-setting Red Hermetite sealant.

perspex · Posted: Thu Apr 23, 2015 12:11 Post subject:

Any tips Pete? , just back off alternator to remove belts , fan off , drain coolant , pump replace and put back together ?? That's wat I'm thinking ?

geodrome · Posted: Thu Apr 23, 2015 13:12 Post subject:

That's fairly much it, I use blue hermatite on the rubber seal keeps it in place and helps the seal. Just a thin smear is needed.

perspex · Posted: Thu Apr 23, 2015 13:17 Post subject:

Cheers fellas, job for next week , will report back

peteinchad · Posted: Thu Apr 23, 2015 16:26 Post subject:

perspex · Posted: Mon Jun 01, 2015 17:15 Post subject:

The time has arrived , going to go for it tomorrow, water pump change , any last ho to,s , how not to,s
Cheers people

SteveW-DID · ***** Joined: 04 Jun 2006 Posts: 826 Location: Dorset

1-drain rad
2-remove metal bash plate so you can get at oil filter
3-drain coolant from block (long nut next to oil filter,takes 12mm socket)
4 remove top rad hose
5 remove fan cowling
6 remove fan
7 I remove rad to improve access but you dont have to
8 slacken fan belts
9 remove water pump
10 install new pump,tighten bolts to 24NM
11 remove glaze from alternator.fan and crank pulleys with fine emery cloth
12 fit belts, as loose as possible, just tight enough that they dont slip. Too tight and your new pump wont last long

Note-never allow the crank pulley to rotate anticlockwise ie when rotating fan as it can damage the chain tensioner Shocked

perspex · Posted: Tue Jun 02, 2015 16:26 Post subject:

Do I split the belt pulley from the water pump whilst in situ , or remove fan first , then pump , then split pulley from pump once it has been removed

peteinchad · Posted: Tue Jun 02, 2015 16:31 Post subject:

perspex · Posted: Tue Jun 02, 2015 16:33 Post subject:

Cheers pete