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2001 VX Commordore radiater drain

JazzyBabe101

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I have a 2001 VX holden Commodore i have done alot of work on the myself but don't know how drain the radiater to put new coolent in can someone plz help me in doing this and also i don't know how much water gose in with it on the bottle it sayd 1 part coolent and 2 part water can anyway help me with that to i need to do it asap cause it keeps over heating on me.
 

goose202

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Usually you just pull the bottom radiator hose off to drain the system.
Mix the coolant up in the specified ratios in a bucket two litres at a time and fill if you're not sure how much goes in, that way at worst you waste 2L of mixed coolant.
However if it's overheating I'd be really surprised if a coolant change fixes anything.
 

graham7773

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Coolant mix should be 1:1 ratio, Holden specs. To properly drain the radiator and block, the knock sensors must be removed. Options? If you flush the block (take the thermostat out, put the housing back on) with the bottom hose off at the radiator, then flush the heater with its hoses off, until only clean clear water is coming out, put 6 liters of straight coolant in with no added water it may be ok. The last six liters of water cannot be drained from the block without removing the knock sensors. Learn how to bleed the cooling system or your heating problems may not go away The important thing to do here is, as goose202 says, is to find the cause of the overheating. New coolant is unlikely to fix that. The VX cooling system has a capacity of 12 liters.
 

saldip

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Hi there, new member here with a few basic questions - 2001 VX
1. can anyone supply an image of where the radiator drain plug is - I simply cannot find one on the internet
2. will four (or five, or six) successive water flushes over four (or five, or six) successive days remove all contamination - presently solid brown colour under radiator cap
3. is there any merit in using vinegar flushes - can it cause any damage, more harm than good perhaps
4. is there merit in using undiluted coolant - i.e 100% coolant, no water
Thanks to all, Cheers.
 

Jxfwsf

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Hi there!
1. There is no drain plug on the radiator, hence why there is no pictures or info on the internet (undo the bottom hose and let it flow)


2. Hose pressure and 100 psi of compressed air through the correct fitting will flush it (not everyone has the correct bungs/fittings in their back yard to do this though), if all you have is a garden hose then no, it won't matter how many times you attempt it you'll never dislodge all the stuff you want to clean out.

A proper cooling system chemical flush, maybe 2 goes would get a lot of it out and flush with clean water.... Any decent method is likely going to dislodge stuff that is currently blocking up any bad leaks.

Tbh if it's that bad and 15 years old I wouldn't even try, and simply drain it and flush with the garden hose until clear water comes out, refill with coolant and keep driving it.


3. Vinegar? It's an acid, it'll eat things like alloy/aluminium, copper and brass. If you don't completely neutralise it after it'll just contaminate whatever coolant you put in afterward aswell.


4. Huh? Why? Where have you heard of anyone even considering doing that? It's not how it works.
 

billythakid

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Straight "coolant" will make your car run hotter , it can't dissipate heat aswell as water /"coolant" mix .
It's actually only put in cars to
1. stop water rusting the guts out of everything internally
2. Stop water freezing in cold ass climates
3. Increases the boiling point a few degrees than plain water
4. Lubricate seals abit to stop them perishing

Anti freeze / anti boil is actually a glycol mix
Coolant is a generic name
 

accentstencil

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It beats me why Holden does not put a tap on the radiator to empty it like most other cars.
 
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