Pure water is the best for dissipating heat, the reason antifreeze is used is as it says, to prevent it from freezing.
Cooling a VVTi motor
- Thread starter LandCruiserPhil
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
- Thread starter
- #62
Also corrosion and lubrication
re_guderian
SILVER Star
Good on Phil for trying to find an upside to a week of 110°+... 
bjowett
Supporting Vendor
Sorry Phil, I should have known you are privy to that type of info. I still wonder if maybe your 99 had a better ratio, or possibly the red works a little better?
- Thread starter
- #65
No worries thanks for the reminder. Anymore I forget more than I know
2001LC
SILVER Star
Was the final out come here and still the case:
Faulty Tstat, replacement bought temps down (all's good now)?
and
VVTi used more gas under load?
- Thread starter
- #67
Looks like the tstat was weak. See post #44
The aux fan was also a great help on cooling performance
2001LC
SILVER Star
I did see #44, so still holds true, thanks. I also read #45, has this held true as well?
- Joined
- Sep 9, 2004
- Threads
- 200
- Messages
- 12,497
- Location
- Boise - Idaho
- Website
- www.snlandcruisers.com
and to raise the boiling point.
I don't have anything useful to add but on my 04 taco with a S/C, I would go from a 70/30 mix to a 30/70 mix when I would leave cold arse Wyoming and head south for the winter. It made a lot of difference on that truck. One time on my way home though I forgot to go back to 70/30, coolant froze in my rad on the HWY and truck overheated. Opps! haha
Cheers
I noticed this too on my 2006 LX, no condenser fan! That explains why my aircon starts to loose its cold air when I idle in traffic here in Las Vegas with temperatures on 108°F in the afternoon on an average.
Happened to me a few times already and shortly after the A/C not blowing cold anymore, the engine starts to shake, rpm drops kind of trying to choke and eventually stalls and dies.
Happened to me a few times already and shortly after the A/C not blowing cold anymore, the engine starts to shake, rpm drops kind of trying to choke and eventually stalls and dies.
Last edited:
BullElk
SILVER Star
I also noticed the consistent higher temps on our '06 LX. Here in South Alabama my '99 LC consistently runs at 188 with 195.4 tops. The '06 is normally 195 up to 202 in more stressfull conditions, never below 195 degrees. This temp difference is very normal between my vehicles with known good parts.
Blazing hot here in Florida...90-100 lately. My 03 is struggling to cool in very hot temps at idle.
Is the condenser fan still an option? Should I replace the Tstat as well? Replaced radiator and hoses last year, think I did an OEM Tstat as well.
Is the condenser fan still an option? Should I replace the Tstat as well? Replaced radiator and hoses last year, think I did an OEM Tstat as well.
2001LC
SILVER Star
First
forum.ih8mud.com
Than coolant flush, thermostat, rad cap. Take a hard look at fan clutch.
Also tune the engine, make sure no vacuum leaks.
Radiator fins need cleaning! Alert Alert Alert
I've a 06LC w/192K I just bought. In reading history I found PO complained of engine temp raising when both front and rear AC on. Toyota Dealership diagnosed with clogged radiator fins. Recommended new OEM radiator, $600 for the US spec Radaitor plus coolant and labor. They should have added...
forum.ih8mud.com
Than coolant flush, thermostat, rad cap. Take a hard look at fan clutch.
Also tune the engine, make sure no vacuum leaks.
You mean struggling to have reliable air conditioning or engine struggling like it stalls/shuts down?
A/C blows warmer. Engine remains strong.
Ok cool then first thing to check is the aux fan, next is your AC pressures using a pressure gauge. Does the symptom AC blowing warm air emerge during idle conditions?
This thread is about engine temperature, and more specifically about VVTi motors which your 03 most likely doesn't have.
Adding the condenser fan is covered here: How to get peak AC performance from your 2003+ 100 series
Apologies for unintended thread highjack. Thanks for the redirect.
