Dried coolant on intake

[TheHomeBuilder]

I was changing my power steering fluid and before I started i was looking over my car. On top of the intake/throttle body I spotted what looks like dried coolant. I noticed it once before and thought it was just a spill when I did the heater t's and I know I wiped it off at the time. So any ideas as what it is? Btw the color looks a little off in the photo, but I'm looking at the redish crusty spot between the two hoses (very very minor leak if it is one)

 

[bulax99]

It looks like that hose is leaking and working it’s way down to where it is dried. From the pic there is a little bit of redness behind that hose and then, although not red, there’s a little bit more underneath the ‘loom” cover on the hose. The area you mentioned is probably where the coolant is pooling before it continues on its path downward. It’s trickling it’s way down. Just from the pic the hose looks a little soft. It’s flared out a little bit on the end I recently replaced my tees and once I removed the clamp and separated the hose from the tee I could not get it to stop leaking. The hose was too soft and swollen to function properly. Get a new hose and be prepared to lightly sand the nipple to remove any caked on coolant.

 

[PADDO]

I was changing my power steering fluid and before I started i was looking over my car. On top of the intake/throttle body I spotted what looks like dried coolant. I noticed it once before and thought it was just a spill when I did the heater t's and I know I wiped it off at the time. So any ideas as what it is? Btw the color looks a little off in the photo, but I'm looking at the redish crusty spot between the two hoses (very very minor leak if it is one)View attachment 1607519

Have you read the thread by @muleski on his leaking throttle body plug? He tapped it back in and covered the plug with JB weld and others have pulled the aluminum plug, tapped the hole and screwed in a solid plug.

 

[abuck99]

Good memory Paddo- Ive seen that plug missing memtioned in another thread but couldnt remember the op.

That plug is giving warning that its about separate from the throttle body. I dont think that plug is a servicable item so youll have to create your own solution as described above or find another throttle body.

 

[bulax99]

I didn’t know that aluminum plug is pressed in. Aluminum plug in an aluminum bore? Wow. That’s a recipe for issues with the expansion and contraction of aluminum. You learn something new everyday.

 

[PADDO]

Good memory Paddo- Ive seen that plug missing memtioned in another thread but couldnt remember the op.

That plug is giving warning that its about separate from the throttle body. I dont think that plug is a servicable item so youll have to create your own solution as described above or find another throttle body.

When I was looking for a replacement throttle body from eBay part out places quite a number of images showed signs of coolant spotting from that blind plug. Was almost motivated enough to buy one and investigate what’s behind the plug and if anything other than reseating the plug with a LFH can be done. Apparently bypassing the coolant lines is a no no as it can lead to freezing up of the butterfly under some circumstances.

 

[TheHomeBuilder]

Okay, I figured it was coming from that plug and didn't know if it was a sign that I would have to replace the throttle body or a sign of issues to come. If it's just a minor thing, I'll live with it. I've replaced the hoses on the pcv and fuel evap in that area and having the dealership replace the hoses on the front end when I get the timing belt done next week. Just wanted to make sure I shouldn't go to an independent to save money to put towards a new throttle body. But it sounds like that isn't the case. I'll enjoy my Lexus cookies and the loner car.

Thank you