I am going through the steps of installing the CBI Covert Bumper (cut went well), but I see pink fluid leak after I took off the factory skid plate. I looked up and found the following. Still under CPO "warranty". Any guidance? Thanks!
leak question - found under front factory skid plate (1 Viewer)
- Thread starter landsat6
- Start date
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Looks like you water pump is leaking. Good catch!
DIY Coolant Valley Leak Repair
The coolant valley plate leak is a potential issue that arises on the GX460 platform (and other 4.6 L V8 1UR-FE engine equipped Toyota's and Lexus's) as the mileage gets to around 100K. A key sign that your GX suffers from this issue is a low coolant condition and coolant running down the...
forum.ih8mud.com
Might be this, I just discovered pink on the underside of my engine too..
Bang Bang
Age is a state of mind.
If it's under CPO warranty, drop it off at the dealer and say the magic words......."Fix this leak, please." 
2fpower
SILVER Star
Amazing timing... I Just found the same thing today when changing the oil.
So, at 90k miles, anything else I should replace when I replace the pump? I assume there is a belt tensioner there as well?
So, at 90k miles, anything else I should replace when I replace the pump? I assume there is a belt tensioner there as well?
- Thread starter
- #6
Crazy - hope I didn't jinx it for you
I have no clue about this but curious to know.
Last edited:
- Thread starter
- #7
If it's under CPO warranty, drop it off at the dealer and say the magic words......."Fix this leak, please."
Update on leak status:
By end of day yesterday, the coolant reservoir had ~1/2'' of fluid left, well below the L line.
I did what @Bang Bang recommended. I took it to dealership early this morning, they reported the water pump is leaking. They should be able to replace it by end of day. They provided loaner car for the day.
Good catch. That's a 4-6 hour job to DIY and not much fun.
2fpower
SILVER Star
well, I am going to tackle this next week... accumulating parts now. Planning on replacing tensioner, other bearing thing, belt,
r2m
Richard
Not sure if it's ALL Lexus dealerships, but generally (including the ones in my area), that is one of the few highlights of going to a dealership for work, is getting a brand new loner to try out for free!
What was the mileage on your truck? Mine went out at 85k for a 2015
- Thread starter
- #12
32k on 2017
I asked if it happens on this 'new' of vehicle -- "some, but not often"
I'd say unlucky at that mileage, but better to happen while still under warranty than at 85k!32k on 2017
I asked if it happens on this 'new' of vehicle -- "some, but not often"
- Thread starter
- #14
Follow up question -- it's great that I caught this and it's being taken care of while under warranty, but should I be concerned at all about the components that soaked in the coolant as seen in the photos in the original post? If the shop doesn't clean it up, should get under there and rinse it? Anything else? Thanks, again.
If Lexus is doing the repair, I'd expect them to clean up as well. Coolant isn't going to damage any components, but I'd want to get it cleaned up as it may mask other potential leaks down the road.
My water pump went on my ‘12 at around 38k miles but was covered by powertrain warranty back in ‘17
Bang Bang
Age is a state of mind.
Damn! This makes me that much happier that I did the wp, belt and associated pulleys at the same time as the valley leak fix.
2fpower
SILVER Star
Anyone have the pages from the service manual for doing this?
Link from bottom video:
Remove
Install PDF
General DIY thread on CL for WP
OEM Part Numbers
Belt / PN: 90916-A2023 or 90916-02680
Cooling fan bracket / PN: 16380-0S020
Idler Pulley / PN:16603-38011
Serpentine tensioner / PN: 166200S012
Thermostat / PN: 16031-38010
Water pump / PN: 16100-09525
Good video
Remove
Install PDF
General DIY thread on CL for WP
OEM Part Numbers
Belt / PN: 90916-A2023 or 90916-02680
Cooling fan bracket / PN: 16380-0S020
Idler Pulley / PN:16603-38011
Serpentine tensioner / PN: 166200S012
Thermostat / PN: 16031-38010
Water pump / PN: 16100-09525
Good video
I would also be highly suspicious of the valley seal in addition to the water pump.
