SC300_704

iTrader: (5)

when changing spark plugs out of a sc300, i know you have to remove the coolant hose under the throttle body but is it nesaccery to drain the radiator fluid as well? if so, then that's a hella work just to remove the spark plugs IMO...or does anyone knows another way w/o removing the hose??

jefferino

iTrader: (1)

Dont do that! I am sure 1000000000 people are going to say "use search button" but I will help ya out.

I changed mine by doing the next from memory bout 6 months ago...

1) remove intake tubing
2) undo 4 bolts on throttle body
3) pull off to the side (be gentle and remove any vaccuum as needed)
3.5) be careful not to mess up the gasket so you don't have to replace
4) remove spark plug cover
5) change plugs

Be sure to properly torque the throttle body back into place my friend helped me and we forgot to tighten the bottom bolts and it made idle all goofy from air leak and made a neato whistling too

DryBlaze

So you are saying to just unbolt the throttle body and try to move it aside while still have the coolant lines attached?

jefferino

iTrader: (1)

thats what i did...just be careful to not rip any of the lines. It should come off and then just set it aside.

Gunnar

I don't disconnect the one on the left side of the throttle body but isn't it pretty much impossible to get the throttle body off without disconnecting the one underneath?

comoSC

That's exactly what I did. I left the coolant lines attached and put the throttle body aside. I did this on my 98, but I would think it would be the same thing for previous years, and probably alot easier, since the 98+ vvti engines have the coils in the spark plug valley and I had to get through this and engine harness just to get to the spark plugs. Regardless, I still got it done just fine.

jefferino

iTrader: (1)

^^ What he said

Also, there is a mkiv supra repair manual floating around on the web somewhere I downloaded a few months ago and has everything for 2jz-ge and gte engines...might want to look for that.

It is on my home computer otherwise i'd look for you but im at work

T0ked

iTrader: (2)

Heh, no need to worry about it. no need to drain coolant either. I just put some rags under the TB and pull out the hoses and plug them until its time to reattach. I lose a drop or two of coolant at the most. It won't come flushing out if that's what you're worried about. The hoses are at the high point in the cooling system so it won't drain automatically and if you didn't open the rad cap, there will be a slight vacuum so that also works in your favor. Plug em and forget about them.

SC300_704

iTrader: (5)

thanks for the info people..even though i own 3 manuals i'm just lazy...plus just wanted to hear other peoples opinions..