Water Pump

[is200 Newbie]

Anyone else on 90k or exceeded it on the original water pump ?

[Shahpor]

Do you mean just IS250's or all of them?

Well, I can't say for sure, but I have been through all my old invoices and there is nothing mentioned of a water pump being replaced. The previous owner seems to have had all his

work done at the dealer (tyres, Battery, etc..), so there is a good chance that it is a complete record.

[steveledzep]

Mine had a service last month at 73k. The safety inspection mentioned "some wear" to the water pump.

But not sufficient apparently to make a claim on the Lexus used car warranty ??

[ColinBarber]

But not sufficient apparently to make a claim on the Lexus used car warranty ??

I assume they can feel a little play but no sign of any leak.

[Gramera flash]

Whilst my car was in for some other work to be done recently Lexus did a basic free all over check and it was mentioned on the report that I had had slight play in the water pump

Car is an 2008 is250 with only 18,000 miles on the clock

[jackcramerr]

how do they check that ? Remove the belt?

Is the water pump issue due to poor coolant ?Perhaps coolant needs higher concentration ? It's utter rubbish if it is a falling part for no reason.

[ColinBarber]

how do they check that ? Remove the belt?

Is the water pump issue due to poor coolant ?Perhaps coolant needs higher concentration ? It's utter rubbish if it is a falling part for no reason.

Unlikely anything to do with the coolant, the bearing is on the outside not in contact with the coolant. A tiny bit of play isn't an issue but it will get to the point where the play allows water past and/or the bearing may start to get noisy. Water pump reliability is a bit of a weakness on the 250 engine, the bearing probably should be a little bigger to deal with the tension the belt is under.

[jackcramerr]

Can't one just replace the bearing then rather spend on a new pump ?

[ColinBarber]

Technically yes but like most things these days they aren't designed to take apart. The Impeller on the inside and hub on the outside are press fitted to the rotating shaft so they would be very difficult to remove without damaging the fragile aluminium casing and the bearing and seal themselves would need to be sourced somehow as they aren't available as spares.

Given that you can purchase an OEM water pump for around £100 it just isn't really worth trying. The biggest expense is the labour cost, why risk having to go through it all again in the short term if a repair doesn't hold up.

[Mouser]

I had mine replaced at ~65k. There was some noise from small air bubbles in the coolant, and some evidence of coolant having leaked. New coolant, belt, pump + fitting came to £260.

[jackcramerr]

installation looks straight forward. If it comes to it i'll just get a new pump and do it.

What surprises me is so many known issues that one needs to be aware of. And how lexus knows and checks everything. Wonder if they have a check list.

[Linas.P]

Mine was replaced at 114k.

[is200 Newbie]

114k - that's good going

[Linas.P]

114k - that's good going

That is what I thought as well.

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