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Block drain plug
https://www.auszookers.com/forum/viewtopic.php?f=5&t=30040		 Page 1 of 1
Author:  HellonWheels [ Tue Jan 31, 2012 11:20 am ]
Post subject:  Block drain plug
Hey guys, can anyone tell me where the coolant drain plug on the block of a G13A is. Flushing my cooling system and dont want any water left in there.
Author:  Boneheimer [ Tue Jan 31, 2012 11:30 am ]
Post subject:  Re: Block drain plug
Never heard of it, google shows nothing, my bet is that what you're looking for doesn't actually exist.
Author:  Reubs [ Tue Jan 31, 2012 11:37 am ]
Post subject:  Re: Block drain plug
Coily and Vit radiators have a drain tap in the bottom radiator tank. Not sure if earlier Sierras have them though. Look there.
Author:  Lokidog [ Tue Jan 31, 2012 11:38 am ]
Post subject:  Re: Block drain plug
The drain plug is at the bottom of the radiator.

Edit: beaten by reubs… Adding to that all WT's have it on the bottom of the radiator on the passenger side.
Author:  Boneheimer [ Tue Jan 31, 2012 12:04 pm ]
Post subject:  Re: Block drain plug
HellonWheels wrote:
Hey guys, can anyone tell me where the coolant drain plug on the block of a G13A is. Flushing my cooling system and dont want any water left in there.


I'm pretty sure he just wants to get rid of all of the fluids in the block, not just the rad.

Anyway, just run your engine flush through, warm it up so the thermo opens up.
Drain again, then top up with radiator fluid.

If you're really worried you can flush it again afterwards with just plain water, then drain that and top up with your radiator fluid and add some post mix so for the amount of water you think is still trapped in the block.
Author:  GRPABT1 [ Tue Jan 31, 2012 12:32 pm ]
Post subject:  Re: Block drain plug
Take the thermostat out and just shove a hose in there and flush all the old stuff out.
Author:  christover1 [ Tue Jan 31, 2012 12:35 pm ]
Post subject:  Re: Block drain plug
GRPABT1 wrote:
Take the thermostat out and just shove a hose in there and flush all the old stuff out.


Thats how I do it.
Author:  Lokidog [ Tue Jan 31, 2012 2:14 pm ]
Post subject:  Re: Block drain plug
Boneheimer wrote:
HellonWheels wrote:
Hey guys, can anyone tell me where the coolant drain plug on the block of a G13A is. Flushing my cooling system and dont want any water left in there.


I'm pretty sure he just wants to get rid of all of the fluids in the block, not just the rad.

Anyway, just run your engine flush through, warm it up so the thermo opens up.
Drain again, then top up with radiator fluid.

If you're really worried you can flush it again afterwards with just plain water, then drain that and top up with your radiator fluid and add some post mix so for the amount of water you think is still trapped in the block.


FYI we can read it just as well as you. No need to get your internet knickers in a knot and put it in bold. :mrgreen:

Pretty sure last time I looked the radiator drain plug is lower than the block and you should be able to get most of the coolant out. Seeing that there's a couple of hoses joining the radiator to the engine.
Author:  royce [ Tue Jan 31, 2012 2:23 pm ]
Post subject:  Re: Block drain plug
Lokidog wrote:
Boneheimer wrote:
HellonWheels wrote:
Hey guys, can anyone tell me where the coolant drain plug on the block of a G13A is. Flushing my cooling system and dont want any water left in there.


I'm pretty sure he just wants to get rid of all of the fluids in the block, not just the rad.

Anyway, just run your engine flush through, warm it up so the thermo opens up.
Drain again, then top up with radiator fluid.

If you're really worried you can flush it again afterwards with just plain water, then drain that and top up with your radiator fluid and add some post mix so for the amount of water you think is still trapped in the block.


FYI we can read it just as well as you. No need to get your internet knickers in a knot and put it in bold. :mrgreen:

Pretty sure last time I looked the radiator drain plug is lower than the block and you should be able to get most of the coolant out. Seeing that there's a couple of hoses joining the radiator to the engine.



Nope, the waterpump is the lowest point in the block that can drain, anything under it around the cylinder walls will stay there.

To answer the question, there is no coolant drain for the block so the best you can do is remove the thermostat housing and give it a thorough flush with clean water, not a lot is held at any rate.

I guess you could tip the can on its side to get it all out :)
Author:  Lokidog [ Tue Jan 31, 2012 2:31 pm ]
Post subject:  Re: Block drain plug
I'm pretty sure my radiator drain plug is below the block and water pump on my 1.3.
Author:  HellonWheels [ Tue Jan 31, 2012 2:44 pm ]
Post subject:  Re: Block drain plug
thanks for your replies guys. I took the thermo out and flushed it out good. Amazing what crap came out. Just wasnt sure about the water staying in the block. Ive put some Chemi weld in there now to hopefully fix my cylinder head issues.
Author:  royce [ Tue Jan 31, 2012 7:14 pm ]
Post subject:  Re: Block drain plug
Lokidog wrote:
I'm pretty sure my radiator drain plug is below the block and water pump on my 1.3.


yes it is, now lets do an experiment


get 2 buckets, a piece of hose and something to poke a hole in the buckets

set the buckets so one is a bit lower than the other

the higher bucket, poke a hole in it half way up and jam the hose in it so its flush with the side
the lower bucket, poke a hole in the bottom (side) and jam the hose in so its flush with the side

Fill the lower bucket up, which will fill the upper bucket as you go

once both buckets are full, stop filling and poke a hole in the lower bucket and let it drain

The upper bucket only drains to the hose doesnt it, thats simulating the block, the water passages might go to teh bottom of the block, it will only drain to the bottom of the waterpump housing
Author:  ZookFan [ Tue Jan 31, 2012 7:18 pm ]
Post subject:  Re: Block drain plug
christover1 wrote:
GRPABT1 wrote:
Take the thermostat out and just shove a hose in there and flush all the old stuff out.


Thats how I do it.



X3. works a treat!
Author:  Lokidog [ Wed Feb 01, 2012 9:26 am ]
Post subject:  Re: Block drain plug
royce wrote:
Lokidog wrote:
I'm pretty sure my radiator drain plug is below the block and water pump on my 1.3.


yes it is, now lets do an experiment


get 2 buckets, a piece of hose and something to poke a hole in the buckets

set the buckets so one is a bit lower than the other

the higher bucket, poke a hole in it half way up and jam the hose in it so its flush with the side
the lower bucket, poke a hole in the bottom (side) and jam the hose in so its flush with the side

Fill the lower bucket up, which will fill the upper bucket as you go

once both buckets are full, stop filling and poke a hole in the lower bucket and let it drain

The upper bucket only drains to the hose doesnt it, thats simulating the block, the water passages might go to teh bottom of the block, it will only drain to the bottom of the waterpump housing


I agree that there will be a little coolant left in the block. That why we flush the system before putting new coolant in.
Author:  ajsr [ Thu Feb 02, 2012 5:26 am ]
Post subject:  Re: Block drain plug
royce wrote:
Lokidog wrote:
I'm pretty sure my radiator drain plug is below the block and water pump on my 1.3.


yes it is, now lets do an experiment


get 2 buckets, a piece of hose and something to poke a hole in the buckets

set the buckets so one is a bit lower than the other

the higher bucket, poke a hole in it half way up and jam the hose in it so its flush with the side
the lower bucket, poke a hole in the bottom (side) and jam the hose in so its flush with the side

Fill the lower bucket up, which will fill the upper bucket as you go

once both buckets are full, stop filling and poke a hole in the lower bucket and let it drain

The upper bucket only drains to the hose doesnt it, thats simulating the block, the water passages might go to teh bottom of the block, it will only drain to the bottom of the waterpump housing

and what do we have???????? anyone???????



















































































2 fucked buckets :lol:
Author:  christover1 [ Thu Feb 02, 2012 7:10 am ]
Post subject:  Re: Block drain plug
There's a holes in my buckets dear Royce, dear Royce.


There's a holes in my buckets dear Royce, a holes.


etc
Author:  Lokidog [ Thu Feb 02, 2012 8:37 am ]
Post subject:  Re: Block drain plug
ajsr wrote:
royce wrote:
Lokidog wrote:
I'm pretty sure my radiator drain plug is below the block and water pump on my 1.3.


yes it is, now lets do an experiment


get 2 buckets, a piece of hose and something to poke a hole in the buckets

set the buckets so one is a bit lower than the other

the higher bucket, poke a hole in it half way up and jam the hose in it so its flush with the side
the lower bucket, poke a hole in the bottom (side) and jam the hose in so its flush with the side

Fill the lower bucket up, which will fill the upper bucket as you go

once both buckets are full, stop filling and poke a hole in the lower bucket and let it drain

The upper bucket only drains to the hose doesnt it, thats simulating the block, the water passages might go to teh bottom of the block, it will only drain to the bottom of the waterpump housing

and what do we have???????? anyone???????


2 fucked buckets :lol:


And no containers left to drain your old coolant in to :mrgreen:
Author:  Boggomobile [ Sun Jul 13, 2025 7:40 pm ]
Post subject:  Re: Block drain plug
Hi Everyone,

A google search revealed this old thread as I was curious just like the original poster. It had me laughing at the stupidity:
Author:  Boggomobile [ Wed Jul 23, 2025 9:13 pm ]
Post subject:  Re: Block drain plug
Hi Everyone,

OK I have stopped laughing now and thought I would share my findings. Having registered my ute 27 times, I was a little worried when the temperature gauge started rising. It had been raining for a week and had just fined up enough to have crystal clear puddles on the side of the road so I cooled the motor down externally using bottles of puddle water while leaving it idle. Luckily the temperature gauge was still working so I was pretty sure there was coolant in the motor but assumed there was less than normal. Then I shut It down and waited long enough so I could crack the radiator cap, restarted and added puddle water gradually and drove home, no smoke so all good.

With just over 300 000 km on it I decided to replace the coolant pump and timing belt. It was when I removed the pump that I realised there was coolant and puddle water still in the block. Not seeing a BLOCK DRAIN PLUG, I had the brainwave of asking Google. That was when I found this thread and started laughing.

Anyway my ute was parked under my gantry so I picked up the back high enough to drain and then used compressed air to blow the last of the coolant out. Happy with the result, put it all back together with new belt, pump, radiator and coolant. Test drove nice and all back to normal so I changed the oil and filter as it was due too.

Just for the record, no buckets were harmed in this exercise!
Attachment:
Screenshot_20250723-211203_Chrome.jpg


Rip Royce!
Author:  shep [ Thu Jul 24, 2025 12:34 pm ]
Post subject:  Re: Block drain plug
So you did tip the car over and shake the last of the coolant out?

Brilliant :lol:
Author:  Andygoodbloke [ Wed Jul 30, 2025 7:05 pm ]
Post subject:  Re: Block drain plug
Just undo the bottom hose where it meets the radiator then you have the filler hole and the thermostat to flush out, put the hose in the bottom hose and wash it back through the block and out the thermostat, then into the bottom of the radiator and wash that as well, you may need a rag or something to help seal around the hose,

Easy

You say you do not want any water left in there - I hope you mean old water when flushing - make sure you open the temp on the heater to hot so you can get some water through that unless you want to stick the hose in the heater pipes. The only down side is it takes a long slow process to get all the air back out of the heater so lots of idling with the cap off once bleeding the air out - with the heater on full

Andy
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