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Where is the drain plug on the block to change coolant?

knore

By knore,
in General Maintenance

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knore Grand Master

knore

Posted
Posted

Hey guys, figure its time to give the coolant/radiator system a flush and replace with some nice tectaloy 90 :)

Ive looked a few diagrams and used the search but cant find exacly where the drain plug is on the block for an r33 gtst?

Ive been told by most people its not necessary to drain from the block aswell, but seeing this is the first coolant change in about 2 years i want to do it properly

cheers

wrxhoon Grand Master

wrxhoon

Posted
Posted
Hey guys, figure its time to give the coolant/radiator system a flush and replace with some nice tectaloy 90 :P  

Ive looked a few diagrams and used the search but cant find exacly where the drain plug is on the block for an r33 gtst?

Ive been told by most people its not necessary to drain from the block aswell, but seeing this is the first coolant change in about 2 years i want to do it properly

cheers

its on the left side of the block ( pass side ) also you have to turn ignition on and the climate control to highest temp 38 from memory so the coolant drains from the heater core and dont forget to empty the coolant reservoir as well .

you are going to need about 8 lts .

Trust33 Grand Master

Trust33

Posted
Posted
Ive been told by most people its not necessary to drain from the block aswell, but seeing this is the first coolant change in about 2 years i want to do it properly

Wouldnt mind a pic of this.

Isn't it on the bottom of the radiator?

I allways thought it was on the radiator too.But have never used it.Just took the bottom hose off.

wrxhoon Grand Master

wrxhoon

Posted
Posted
Wouldnt mind a pic of this.

I allways thought it was on the radiator too.But have never used it.Just took the bottom hose off.

yes of course there is one in the bottom of the radiator , how else are you going to drain the radietor ? i guess you could take the bottom hose off .

the one on the block is there to drain the block .

knore Grand Master

knore

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thats exacly what i was looking for thanks gordon!

also what exacly do i do with the heater? I drain the radiator and the block then turn the heater on to its highest setting? Im guessing more coolant will come out, and when it stops coming out turn the heater off...

need 8.4L for rb25

Mite make a tutorial with pictures on how to change coolant when i do it today

Trust33 Grand Master

Trust33

Posted
Posted
thats exacly what i was looking for thanks gordon!  

also what exacly do i do with the heater? I drain the radiator and the block then turn the heater on to its highest setting? Im guessing more coolant will come out, and when it stops coming out turn the heater off...

need 8.4L for rb25

Mite make a tutorial with pictures on how to change coolant when i do it today

Good stuff do that..Thats handy to know predator...Do mechanics drain from the block location every time or is it done with the hose as well?

knore Grand Master

knore

Posted
  • Author
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ok well i changed the coolant today

only problem is the drain bolt on the block would not come off! it on there good and i couldnt get any good leverage to get it off. :P

So i did the best to flush as much of the old coolant i could out, but for some reason it only took 5L of new coolant. So obviously there is still 3L in there :)

Not that it makes any difference, but i like to do things right if im going to do it so i kinda feel jipped

Owell, i mite wait for the new coolant to work its way in when the thermostat opens and then do another flush to get the rest of it

predator Grand Master

predator

Posted
Posted
Good stuff do that..Thats handy to know predator...Do mechanics drain from the block location every time or is it done with the hose as well?

I'd say many mechanics would be lazy and just do the hose method..

Knore, you might need a breaker bar to get more leverage on the socket.. longer the leaverage the easier to get it off. $20 or so for a cheapie. Anyhow, should be ok - 8L sounds too much to me (i thought it was only 5L too) but wrxhoon would know more than me.

knore Grand Master

knore

Posted
  • Author
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Yeh thats what i figured

The problem is, the bolt is a 14mm, and was kinda worn to begin with so there was never much chance of getting it off

If i moved the dump outta the way it would be easy, but thats alot of work just to flush the coolant ;p

It says in the RB25 manual the radiator capacity is 8.4L, which is probably the entire system including the overflow bottle etc. Either way i did a fair bit of flushing and it only took 5L

wrxhoon Grand Master

wrxhoon

Posted
Posted
Yeh thats what i figured

The problem is, the bolt is a 14mm, and was kinda worn to begin with so there was never much chance of getting it off

If i moved the dump outta the way it would be easy, but thats alot of work just to flush the coolant ;p

It says in the RB25 manual the radiator capacity is 8.4L, which is probably the entire system including the overflow bottle etc. Either way i did a fair bit of flushing and it only took 5L

the bolt on the side of the block is tapered so its always going to be very tight .

if you didnt bleed the air out of the system it will take a bit more when you get it hot and then cool down again .

if you left a couple of litrs of old coolant in there its not so bad , just change it more often or use 50% , i use 33% change it every 2 years but i always emty the block and the heater .

when you change your engine oil you can never get it all out .

wrxhoon Grand Master

wrxhoon

Posted
Posted
yeh thanks wrxhoon

youd think they could put it in a better location :D

now that i know whats involved ill just take the dump off next time

its fairly easy on a gtst , a bit harder on the gtr rb26 ,its a little harder to reinstall .

i wouldnt take the dump out just to do a coolant replacement though , i somehow get the plug off with dump in place , a lot less work .

whatever you do dont crossthread it , its a lot more work then....

foznice Veteran

foznice

Posted
Posted

i thought that 8litres sound a bit too much as well. But if the manual says that, then i guess theres no arguing. I do PT work at a motor mechanic. It's been a while since i've flushed out the cooling system but i think that we drained from the block, then took the hoses off and flushed out with tap water.

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