Coolant Temperature - random spike (2 Viewers)

[bloc]

No further temperature issues once you got it full of water?

 

[Cruiserhead05]

No further temperature issues once you got it full of water?

Correct. As if there was no underlying issue at all. Ryan at OTRAMM had suspected the temperature spikes could be coming from a steam "pocket" (my analogy) that was traveling its way through the system due to low coolant. This would explain the irregularity and fact that it would leave as quickly as it came.

 

[gaijin]

August 29, 2020:

Coolant in the reservoir with hose hooked up properly?
Level at the top of the radiator when cap removed?

Possibly an air bubble forming then moving around?

Either way this is not a common issue. Please keep the board informed with what you find.

Correct. As if there was no underlying issue at all. Ryan at OTRAMM had suspected the temperature spikes could be coming from a steam "pocket" (my analogy) that was traveling its way through the system due to low coolant. This would explain the irregularity and fact that it would leave as quickly as it came.

@bloc for the win!!!

 

[PDoyle]

Progress photo courtesy of @OTRAMM

View attachment 2431012

Is all that yellow stuff foam?

 

[Cruiserhead05]

Is all that yellow stuff foam?

Yes. There is quite a bit of foam blocking material around the intake manifold.

 

[PDoyle]

And the only way to get rid of it is to remove the intake. That's gotta be holding the heat in. Does it stop the mice from making a home? What is the reason the foam is there?

 

[Cruiserhead05]

And the only way to get rid of it is to remove the intake. That's gotta be holding the heat in. Does it stop the mice from making a home? What is the reason the foam is there?

No clue. anything i say would just be a guess.

 

[bloc]

The foam blocks keep noise in, and dirt and rodents (for a while anyway) out. With the shape of that area I think it would get filled with dirt if there wasnt anything blocking the way.

As for holding heat in.. I guess? But it shouldn’t be getting to any temperatures it isn’t easily designed for. The fact that not all of these leak suggests it’s some kind of production issue. Is it as common on tundras? Weren’t those engines produced in a different location?

 

[Hoosier Daddy]

This thread has inspired (scared) me to see if I can get my borescope under the intake manifold to see if I have any pink crusties. I'll probably go in by the PCV valve.

EDIT - Looks dirty but free of the Pink Terror.

 

[bloc]

This thread has inspired (scared) me to see if I can get my borescope under the intake manifold to see if I have any pink crusties. I'll probably go in by the PCV valve.

That shouldn’t hurt anything, but then again if your coolant level is steady it also shouldn’t be leaking.

As many of these as we see, I’m still not adding it to the job when I reseal my timing chain cover to fix the oil leak I have.

 

[Cruiserhead05]

truck is all back together. Minus a small coolant leak from a line on the external oil cooler, everything seems happy. Temps are steady at 185*f

Blackstone oil test kits is on the way so getting an oil test is next on the list to see if there’s any cooling in the oil.

 

[Cruiserhead05]

The foam blocks keep noise in, and dirt and rodents (for a while anyway) out. With the shape of that area I think it would get filled with dirt if there wasnt anything blocking the way.

As for holding heat in.. I guess? But it shouldn’t be getting to any temperatures it isn’t easily designed for. The fact that not all of these leak suggests it’s some kind of production issue. Is it as common on tundras? Weren’t those engines produced in a different location?

I read of it happening with a few tundras and some of the 5.0L V8’s in the F line of Lexus cars (ISf etc)

 

[justinsmnz]

truck is all back together. Minus a small coolant leak from a line on the external oil cooler, everything seems happy. Temps are steady at 185*f

Blackstone oil test kits is on the way so getting an oil test is next on the list to see if there’s any cooling in the oil.

If you don't mind me asking, what was the final bill (or at least how many hours were billed) to get it sorted out? My dealer wouldn't budge on the book rate of 11 hrs when I called for a quote, so I'm currently exploring various other options.

 

[Cruiserhead05]

If you don't mind me asking, what was the final bill (or at least how many hours were billed) to get it sorted out? My dealer wouldn't budge on the book rate of 11 hrs when I called for a quote, so I'm currently exploring various other options.

Pm sent

 

[Cruiserhead05]

Got the Blackstone report back. All seems well!

See below for comments and measures. Magnesium seemed higher than averages but that didn't seem to alarm them. No coolant, which is what i mainly wanted to check given comments of head gasket strain.

I'm no expert, so additional comments are welcome here.

 

[PDoyle]

Looking at the post #51 pic I see two black hoses going across the back of the engine. Are they coolant hoses, and is there any reason to maybe change them out?

 

[Cruiserhead05]

Looking at the post #51 pic I see two black hoses going across the back of the engine. Are they coolant hoses, and is there any reason to maybe change them out?

Not sure if they are coolant line, but either way, I'd be all for swapping any/all associated hoses while in there.

 

[bloc]

Looking at the post #51 pic I see two black hoses going across the back of the engine. Are they coolant hoses, and is there any reason to maybe change them out?

I think those are the supply and return lines to the passenger side fuel rail.

 

[PDoyle]

Are they rubber lines or just rubber coated ?

 

[bloc]

Are they rubber lines or just rubber coated ?

Some kind of hard plastic if memory serves.