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 Is radiator flush needed?

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SUSmarana
post Jul 16 2019, 06:47 PM, updated 5y ago

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how often need to do radiator flush?

it has been around 4 years i see radiator cap always got rust.

is it ok to just put coolant into the spare tank? or mandatory to flush everything inside first?
WiLeKiyO
post Jul 16 2019, 07:15 PM

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QUOTE(marana @ Jul 16 2019, 06:47 PM)
how often need to do radiator flush?

it has been around 4 years i see radiator cap always got rust.

is it ok to just put coolant into the spare tank? or mandatory to flush everything inside first?
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Rust is not a good sign.

Pugbunny
post Jul 16 2019, 09:02 PM

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Suggest to flush the radiator to remove the rust deposit from the coolant
SilentForever
post Jul 16 2019, 09:32 PM

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Flush it and use coolant that is suitable for your vehicle. Best if can use 50/50 premix coolant. If not, dilute with distilled water. However, if u are doing at outside workshop, they will 100% use tap water, yes some people say the anti-rust in coolant will negate that and our climate does not need 50/50. But personally, if u doing at outside, better just use 50/50 premix that can save you the hassel of rust and other problems.
netmatrix
post Jul 16 2019, 10:00 PM

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I do it about 1.5 years. Not necessary. But because my old car had cast iron block that is more susceptible to degradation unlike aluminium ones. So a bottle of toyota coolant will do the job of keep things in working order.
6UE5T
post Jul 16 2019, 10:20 PM

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QUOTE(marana @ Jul 16 2019, 06:47 PM)
how often need to do radiator flush?

it has been around 4 years i see radiator cap always got rust.

is it ok to just put coolant into the spare tank? or mandatory to flush everything inside first?
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Ideally flush the radiator then change with new coolants every 50k km.
Thrust
post Jul 17 2019, 06:27 AM

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Since you radiator is starting to rust, it is better to perform flushing.

The cooling system should not rust if one always uses coolant.

My car is coming to 10 years and there no sign of radiator rust as I've always use coolant only. For top up, I will use distilled or battery water (which are also distilled water btw).
abubin
post Jul 17 2019, 05:47 PM

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While you are flushing, can also do radiator treatment.
bo093
post Jul 17 2019, 07:43 PM

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Flush when the cooling system is negelected.
Espcially when rust & scale are formed.
EDIT: Might want to service the radiator while at it. Since rust & scale might clogged it.

Filled with coolant & de-ionized or distilled water at 50/50 ratio.
Never filled with tap water. It will still rust even with coolant.
Premix are headache free albeit they are more expensive.
Expect longer life for the cooling system.

While at it check the hose & the rest of the cooling system.

This post has been edited by bo093: Jul 17 2019, 07:44 PM
mp3
post Jul 19 2019, 01:46 PM

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Since we on this topic, I just diy change coolant and noticed a very small coolant leak between the thermometer housing and the engine. This is the housing I removed to release the coolant from the engine.

Is there any grease or something I could put to prevent leakage between the two ?
sitescope
post Jul 19 2019, 02:36 PM

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QUOTE(marana @ Jul 16 2019, 06:47 PM)
how often need to do radiator flush?

it has been around 4 years i see radiator cap always got rust.

is it ok to just put coolant into the spare tank? or mandatory to flush everything inside first?
*
Sometimes flush radiator also not enough if all the hose aldy hard
Need replace all the hose too
sitescope
post Jul 19 2019, 02:38 PM

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QUOTE(mp3 @ Jul 19 2019, 01:46 PM)
Since we on this topic, I just diy change coolant and noticed a very small coolant leak between the thermometer housing and the engine. This is the housing I removed to release the coolant from the engine.

Is there any grease or something I could put to prevent leakage between the two ?
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U can search lot of sticky tape in shopee
eg. Flex tape
abubin
post Jul 19 2019, 04:28 PM

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QUOTE(mp3 @ Jul 19 2019, 01:46 PM)
Since we on this topic, I just diy change coolant and noticed a very small coolant leak between the thermometer housing and the engine. This is the housing I removed to release the coolant from the engine.

Is there any grease or something I could put to prevent leakage between the two ?
*
You mean the hose is leaking? If the hose is still in good condition then you can use silicone sealant. Else just change to a new hose.
mp3
post Jul 19 2019, 06:06 PM

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QUOTE(abubin @ Jul 19 2019, 04:28 PM)
You mean the hose is leaking? If the hose is still in good condition then you can use silicone sealant. Else just change to a new hose.
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Nope, it is a metal block housing the thermometer, which connect to the engine block by couple of bolt and nuts.
bo093
post Jul 19 2019, 06:40 PM

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QUOTE(mp3 @ Jul 19 2019, 01:46 PM)
Since we on this topic, I just diy change coolant and noticed a very small coolant leak between the thermometer housing and the engine. This is the housing I removed to release the coolant from the engine.

Is there any grease or something I could put to prevent leakage between the two ?
*
If it a thermostat housing, most likely there is a gasket.
Replace the gasket.

 

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