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DIY: How To Replace the Water Pump on the IS 250

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Old 01-24-14, 12:57 PM   #31
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Originally Posted by lexus-is2 View Post
Really? that's worrying. i did this almost a year ago and driven over 10k miles and have not had any other symptoms relating to head gasket, oil is also always clean. Anyone else had similar issues? why shouldnt the coolant overflow and gush out? specially since the coolant will start being pumped causing a pressure and as the cap is open it just comes out
Coolant shouldn't overflow because the coolant system is not pressurized with the cap off. In a normal cooling system, it would just bubble out of the opening. When I worked on my honda prelude, the same thing happened to me. Coolant gushed out as soon as i started the car. Turned out to be a blown head gasket.
But I'm no expert, I just know from past experience. Maybe someone with more experience can chime in on this.
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Old 01-24-14, 03:46 PM   #32
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Great DYI!
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Old 01-26-14, 03:34 PM   #33
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well done! This was something this forum needed. I just had to tackle this about a month without a DIY.
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Old 01-27-14, 09:10 AM   #34
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Quote:
Originally Posted by Serifiyah View Post
Coolant shouldn't overflow because the coolant system is not pressurized with the cap off. In a normal cooling system, it would just bubble out of the opening. When I worked on my honda prelude, the same thing happened to me. Coolant gushed out as soon as i started the car. Turned out to be a blown head gasket.
But I'm no expert, I just know from past experience. Maybe someone with more experience can chime in on this.
Other Notes:

1- I agree. However when removing the air in the system, it will bubble up and maybe spill a bit, especially since the water pump is so close to the cap. (I am not an expert either)

2-You definitely have to monitor the coolant level for a few weeks and add coolant if needed.

3-It is a good idea not to reinstall the plastic under tray for a few days/ weeks to make sure that you don’t have any leaks.

4-I already poured 2 gallons of coolant in the system, so you may want to buy 2 gallons when replacing the water pump. (I don’t have any leaks at all)
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Old 05-17-14, 09:40 AM   #35
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Thank you so much!!
I just change my waterpump it was successful thanks to you serifiya...
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thanks to. Raceline USA and Temple City Auto Repair
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Old 05-17-14, 02:28 PM   #36
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Thank you so much!!
I just change my waterpump it was successful thanks to you serifiya...
I'm glad it worked out for ya.
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Old 06-25-14, 07:40 AM   #37
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About to tackle this next weekend. I took in my 07 IS for a 75K maintenance and they came back with a repair estimate for $4K. It included this replacement plus, cv's and struts.

Looks like I got some work to do!!!

Thanks for this write up.
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Old 07-07-14, 07:57 PM   #38
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Just wanted to say thank you to OP for the write up. It went flawless. Thanks
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Old 08-06-14, 05:47 PM   #39
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Also want to say a big thank you to Serifiyah for this excellent guide. I've completed my waterpump change.

One suggestion I would make to reduce amount of waterfall from the water pump when removing, I created a little siphon using clear tubing attached snugly to a lid of a plastic bottle, i then pumped it creating a vacuum which drained quite a bit of fluid from inside the waterpump . I pushed in the open end of the tube through the waterpump output where the big O ring sits, then just waited for as much coolant to drain as possible.
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Old 08-06-14, 05:47 PM
 
 
 
 
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2006, 2007, 250, change, changing, diy, grinding noise, hard, is250, leaks, lexus, pump, replacement, replacing, specs, torque, water, water pump, waterpump

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