Toyota 4.2 ltr 1HZ water pump

Submitted: Monday, Mar 28, 2016 at 13:53
ThreadID: 131945 Views:4020 Replies:6 FollowUps:2
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Hi guys
My Troopy water pump was replaced 100 000 kms ago with a genuine Toyota water pump. I'm now due for a timing belt kit . Should I replace the water pump as well or do they last a lot longer than 100 000 kms
Thanks
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Reply By: Bob Y. - Qld - Monday, Mar 28, 2016 at 14:21

Monday, Mar 28, 2016 at 14:21
Changing it again now might depend on what you're using it for in the future, Scott. A number of remote trips planned would be a "yes", while if you're only doing short trips, close to home, you could get away with it.

Only ever needed to change one water pump in a 1HZ, but most of the Landcruisers we were using were traded at 3 years, about 150K kms. Just sold my old '02 turbo ute, with 285K on it, and with original w'pump.

Bob

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AnswerID: 597848

Follow Up By: pop2jocem - Monday, Mar 28, 2016 at 20:52

Monday, Mar 28, 2016 at 20:52
I changed the water pump on my '91 1HZ powered Cruiser at around 120,000 k's when I changed the timing belt. Just precautionary, no leaks or play or roughness in the bearings..

Like a mug I fitted a non genuine pump. The bloody thing started leaking about 30,000 k's later. A new genuine pump fitted and still there at 300,000 k's.

Cheers
Pop
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FollowupID: 866930

Reply By: Whirlwinder - Monday, Mar 28, 2016 at 16:05

Monday, Mar 28, 2016 at 16:05
I had my 80 series 1HZ for 17 years and 300000kms and it was still the original water pump. If your new one has only done 100000kms I would leave it alone.
AnswerID: 597852

Reply By: OBJ - Monday, Mar 28, 2016 at 19:32

Monday, Mar 28, 2016 at 19:32
FWIW I replace my water pump every 100,000 km when I have the timing belt replaced. It may not need it but it gives me peace of mind, which is more than worth the cost of the replacement pump.
OBJ
AnswerID: 597862

Follow Up By: OBJ - Monday, Mar 28, 2016 at 19:34

Monday, Mar 28, 2016 at 19:34
I meant to mention that I have a '91 Landcruiser with almost 500,000 km on the clock. It is still going strongly.
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FollowupID: 866926

Reply By: Malcom M - Tuesday, Mar 29, 2016 at 07:16

Tuesday, Mar 29, 2016 at 07:16
100,000 is nothing for a genuine. I'd leave it there till the next belt change.
Mines around 285Km still on the original.
AnswerID: 597889

Reply By: Member - Alastair D (NSW) - Tuesday, Mar 29, 2016 at 08:32

Tuesday, Mar 29, 2016 at 08:32
I just sold my 1994 1Hz troopy with just under 400k and the original water pump and alternator. The belts were all changed every 100k whilst I owned it.
Since we used it for remote travel I always carried a full set of belts, a water pump and alternator. To me these are key spares along with f/r main leaf which were bolted into the roof rack.


AnswerID: 597893

Reply By: Member - Rosco from way back - Wednesday, Mar 30, 2016 at 18:23

Wednesday, Mar 30, 2016 at 18:23
To flip to the other side of the coin. My VDJ79 had the pump replaced under warranty at perhaps 40K. Mind you, the general consensus of opinion on LCOOL is that they seem prone to premature failure on this model.
Amazing how T can get it right on the earlier models and then turn around and put out dodgy units on more recent releases.
AnswerID: 597979

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