wr332

i wanted to know what best coolant for rx350 2007, i'll check inside and there are pink leftovers.

also i'm close to napa and i check online .

http://www.napaonline.com/Search/Res...+50039+2039002

these are what they have available.

salimshah

Stick with toyota coolant.

Salim

wr332

thanks salim.

are there specific coolant i need to get for 07 rx350 or do they all work?

salimshah

I would call Lexus dealership -> parts and ask them. They keep track of latest recommended parts/fluids. For my RX300, I get the Toyota Red coolant and mix it with distilled water [1 : 1.25 water]. There is a chart for the mix ratio on the bottle. More water improves heat transfer, but you risk freezing.

If you want to do a bit more, you can add "water wetter" by Redline. This reduces the water tension and improves coolant adhesion to engine and radiator wall and improves heat transfer. Less hot spots .. if you believe the literature.

Salim

RX330inFL

@wr332

How many miles are on your 2007? If low, say under 60K, this makes sense to flush and fill. However, if you have high mileage, say over 80K, you might want to hold off as you will soon be needing to have your timing belt replaced and you might as well do all that at the same time.

Also, keep in mind salimshah's comment to use only distilled water. Anything else may contain mineral deposits which could lead to problems later.

wr332

my rx is 56000 and when i look in the coolant bottle i see that it's on low. almost going out.

so i should get it flushed ?

ps. adding water to coolant???????

i have been adding coolant for many years ( other cars ) and i never add water.

salimshah

Fresh coolant comes in two form. Concentrated and pre-mixed. The premixed is convenient for topping up. Concentrated, better-suited for drain and fill. Flush should not be needed under normal conditions. Water by itself is pretty good to transfer heat and by adding anti-freeze its capacity to transfer heat is reduced. That is why conc. coolant would overheat the engine. [Coolant removes heat from the block and then radiates it through the radiator ... we transfer heat twice]. Water by itself would freeze at 0c, so additive is needed.

If you are topping off in the radiator it self, reaching for water or conc or premix, all would work as there is enough volume of the mix. If you are topping off the overflow, water would be bad as if temp falls below freezing it will freeze and expand as solid. Conc would work as the heat exchange is with the environment and not the engine.

Depending on how cold it gets, one can adjust the mix ratio. In central Texas, I use 1gal bottle of conc and add water to fill the system uo [that works out to be 1:1.25]

I hope it demystifies the issue.

[I substitute H2O for water]

Salim

mandyfig

Get Toyota as Salim suggested. Do not waste money of any other than.

wr332

i 'm going to get the Toyota one when i get my oil changed

not really sure about the water mixing, i'm in new jersey about 15 mins away from NY

it's colder then texas. so i should consider adding water to it..

salimshah

You are not reading the posts. Get a premix and no dilution or get the concentrate and follow the dilution (chart is on the bottle) .. some do a 50:50 mix. If you plan to do 50:50 that then get 2 bottles of concentrate ... drain and fill require 2.25~2.5 gallons.

If you plan to DIY, read Lexmex's instructions.

Salim

wr332

does toyota make premix coolant? can i just buy it and just pour it in and no other fuss..

LexFather

It is great coolant. If you want to do anything look for a better thermastat but not sure if they sell one for the RX.

DO NOT mix RED and GREEN COOLANT. Toyota is red coolant so use Toyota. Do not mix some green Prestone or something with the red.

salimshah

You are killing me with a blunt knife .
Go to parts and ask if they have both [premixed or/and concentrate]. They will even tell you how many bottles you must purchase for a drain and fill (if you go to Lexus). Price them out and add the cost of distilled water for dilution. If they have only one, then they will make the decision for you.

You can eye ball the mixing or use a measuring cup. If your mix is off by couple of drops, it would not be a disaster. The procedure to drain is 10x more complex than mixing two liquids.

Salim

wr332

this is just huge for me. i did not know that you need to add water in your coolant system.

all i do is buy antifreeze/coolant and then pour it in when it was low.

i never add any water, have been doing this for 3~4 years now. ( not on the lexus )

salimshah

Just follow the instructions on the bottle and you will do fine.

I am not saying this as a jest or to mess-up your vehicle.

Salim