GoldLexus99

So yesterday I decided to drain my coolant and add some new aftermarket coolant. I pulled off the plastic cover underneath my car, then drained the coolant in the radiator by twisting the butterfly plug (the car was still cold). Then I filled the radiator up with water, and ran the car about 20 minutes with the heater on high. I got it to operating temperature, shut it off, then drained the dirty water that mixed with the coolant still circulating through the block. I refilled the radiator with water, then ran it again with the heater on high. I drained the water from the radiator, and filled the radiator, as well as the overflow tank, with 50/50 coolant (half water), and it only allowed one gallon before topping off. Now the questions.

I know my tank holds 2 gallons of coolant, so by adding the 50/50 coolant, I only have about 25% anti-freeze in my tank. Plus, I read that Lexus recommends Toyota red coolant for my car, which was the color that drained out originally. I can't locate where (if there even is one) the coolant plug for the engine block, so how am I supposed to drain the entire 2 gallons befre adding the new coolant? I was thinking that I'd run the engine at operating temperature with the heater on high, and have the radiator drain plug open, making sure I didn't overheat the car, but has anyone else done it this way? Secondly, is it really that big of a deal to add Toyota red coolant? I don't mind going to get some, I was just wondering how much of a difference people say it makes. Thank you.

eh... i just bought my Gs300.. have you just tried to put the water hose in the coolant line going to the block and letting it run until all the dirty or old coolant washes away? because if you do that, not only will you have it clean, but you will have fresh water? i dunno.. don't quote me.... i always take mine to a service shop. for quality.

hey guys, i was wondering if you guys ever had a problem like mine? or if it was considered a problem/

I drive a 99 GS300, but here is the thing.

i am positive it has no turbo nor supercharger...... completely stock.

but..

when i drive on WOT, i hear this wastegate/BOV type sound after the car changes gears on WOT.

could anyone tell me what this is?

it acts as if it had a turbo... could this be my air intake? (stock intake)

WOT..... 1rst gear...during change to next gear.. pshhhhh. 2nd gear........ and so fourth.... it's pretty loud. and people have been asking me about it.... o.O

please help the noobie! thanks