Here's a detailed thread on DIY water pump.

https://www.clublexus.com/forums/is-...e-is250-4.html


Depending on where the leak is in proportion to the front end. Check radiator location, pump location weep hole leakage. Remove serpentine belt at check the pulley for movement.


Evap:
So the hard line is not disconnected yellow arrow?

Is the solenoid ticking on start up? Any idle hunt once the car is at operating temp?




Blue arrow disconnect hose, and check if it has suction while solenoid is active. Then unclip the connector, and there should be no suction at all. The solenoid should be in the closed position.

 

Nope I don't hear any ticking. Yellow arrow is not disconnected. I replaced the connector (the blue one next to your blue arrow). So start the car with the blue arrow hose disconnected??


Also here is a couple of the drops I was talking about. This was just now about 90 minutes after I turned off the car. I took the picture from direct under the radiator. Left is roughly 5 nches passed radiator. Right is roughly 3 inches.

 

Tested the solenoid and the connector with my multimeter at 20k. Solenoid was 8.5 ohms and connector was .02

https://www.lexuspartsnow.com/parts/lexus-valve-duty-vacuum-s~90910-12276.html

 

Have you applied 12V source to the solenoid?

Pull the botom engine splash gaurd to see if the radiator has blown a seam. With all the overheating I wouldn't doubt it at this point.

The same goes remove the top radiator shroud. Inspect with a flash light the seams, fins, inlet hose, outer hose for wet spots.

 

I'll check the seams tomorrow morning.

I messed up in my post with my readings on multimeter. Here's what I just did


Solenoid ^^^^^^^




Connector ^^^^^^

 

So I looked from above the radiator and looked around for anything... here's what I saw


https://photos.app.goo.gl/363nCS4XuX3ebDpK8

 

Another video..

​​​​​Put the car up today and yikes. I think I have a problem here. I changed my oil 2 months ago and it did not look anything like this

https://photos.app.goo.gl/6d3V78S5UUoU7Mqn9

 

That looks rough.

 

I couldn't access it. What did you see?

This engine hitting 285°F a few times is concerning. Did it mix oil and coolant?

 

My interpretation was busted radiator spewing coolant, and either the oil cap leaking for the filter. Another possibility is maybe the OCV oil feed line busted. The video is no longer viewable.

 

Sorry I deleted it by accident. Here it is
https://photos.app.goo.gl/6d3V78S5UUoU7Mqn9

 

What have you discovered? Did you degrease the area with oil? Radiator where is it leaking from?

 

I


​​​​I cleaned the area as best as I could. I looked at the top, bottom and sides of radiator and there's no leak.

Quick question though... Where does this hose go to?

 

It just hangs there to the right of the cap. It's the overflow vent pipe.

So you cleaned the radiator and no leaks? That is strange you can clearly see green coolant. Was that an oil leak on the panels?

Do you have the cap on correctly on the reservoir?

The tab faces radiator. Left hose goes to the water neck, and vent hose to the right.

The center one is the pickup tube.

https://www.clublexus.com/forums/is-...t-problem.html

 

Okay cause I'm missing that tube.

Yes I have it in correctly how you described. Yeah it's hard to pinpoint where it's coming out from because it's up in high places yet I don't see any leaks form hoses or anything.

You know that little plastic nipple thing on the bottom of the reservoir that pops into the plastic frame of the fans r to keep the reservoir more snug? When I lift out the reservoir, the slot on the plastic fan covering it goes into, has coolant sitting there. Like how did it get under that? There's no sign of overflow from the radiator cap or reservoir. The **** is just everywhere...