Workshop to recommend for servicing ?

[Mkl22]

On 7/23/2025 at 11:21 AM, RH1667 said:

Made an appointment with Edwin yesterday online, went down this morning to get my car aircon flush and also change a new car battery.

All done in 15 mins ! 

but why need to flush AC? which mechanic tell you one? Do you also flush home AC?😁

Edited July 23, 2025 by Mkl22

[Beregond]

On 7/23/2025 at 11:21 AM, RH1667 said:

Made an appointment with Edwin yesterday online, went down this morning to get my car aircon flush and also change a new car battery.

All done in 15 mins ! 

Flush ac 15 mins🤔🤔🤔that is super fast.

I remember last time flushing took 40 mins.

Maybe now modern machine already 

[Gnahp]

On 7/23/2025 at 2:10 PM, Mkl22 said:

but why need to flush AC? which mechanic tell you one? Do you also flush home AC?😁

actually I was thinking about the fridge too

got people flush their fridge? 😁

what will happen to the fridge if we don't flush it regularly?

 

[Mkl22]

On 7/23/2025 at 3:05 PM, Gnahp said:

actually I was thinking about the fridge too

got people flush their fridge? 😁

what will happen to the fridge if we don't flush it regularly?

 

上车？🤣

[Gnahp]

On 7/23/2025 at 4:18 PM, Mkl22 said:

上车？🤣

[Beregond]

Actually flushing of AC system.  Its really up to Indv.

WS theory is if we need to change engine oil. Auto oil. Then inside the ac system there are oil also . Why dun need change?

Make sense? But the machine for flushing AC system is only popular from around 10 or 15  years ago. 

Some machine got a transparent cup. U can see your old and dirty oil being suck out slowly. Then new oil pump in. Most owner that love their car like their wife will love the feeling.

But there is a catch. When they flush or suck out your old compressor oil. There is a strong vacuum force at work.

If your car is old and certain jap and kimchi model where the cooling coil is thin. 

After u flush your ac system . The cooling coil leak instead.

Edited July 23, 2025 by Beregond

[Mkl22]

Workshop load of crock! Engine oil is different. There are combustion gases and blow by plus the temperature is many times higher. 
I would liken compressor oil to be more like rear differential. But the wear is also very much less. 
home Aircon works for much longer hours. My home Aircon on original factory charge gas and on every day for 10hrs for 5years. 
also like @Gnahp said, fridge? Got change ah? You should ask workshop. My fridge work 24/7 for the last 15years…. How? 

that’s why I say many but not all local mechanics and workshops are shit. Uneducated ones spouting nonsense and selling snake oil.

Flushing like you said only became popular last 15years. Cause already spent $$ to buy the machine, of course must come up with some cock story to recoup ROI.
 🤣

Edited July 23, 2025 by Mkl22

[mersaylee]

Went to new luck recently becos ac suddenly not cold...could be due to the hot weather...no sign of condenser or clutch plate issue...added gas since the ac pipe showed no condensation...must be low in gas...once it's topped up...could immediately see the condensation droplets...also added oil to the system to see if there's any leak...told to monitor in a week...if not cold again...can next try the sealant before the last draw which is to ripe out dashboard to look at the cooling coil unit...🤞😁

 

Edited July 23, 2025 by mersaylee

[Mkl22]

On 7/23/2025 at 7:09 PM, mersaylee said:

Went to new luck recently becos ac suddenly not cold...could be due to the hot weather...no sign of condenser or clutch plate issue...added gas since the ac pipe showed no condensation...must be low in gas...once it's topped up...could immediately see the condensation droplets...also added oil to the system to see if there's any leak...told to monitor in a week...if not cold again...can next try the sealant before the last draw which is to ripe out dashboard to look at the compressor unit...🤞😁

 

See if it’s a slow of fast leak. Mine had a slow leak will take close to 8mths to leak. Some pin hole on the evaporator. Decided change. Didn’t want to keep topping up even though it was cheaper even in the long run. OCD!  Was $400 at L&kim vs top up $20 each time. 🤣

Edited July 23, 2025 by Mkl22

[Yeobh]

Vehicle Cooling system reverse flushing with water and compressed air  - is this service of any use ??

[Lala81]

On 7/23/2025 at 7:14 PM, Mkl22 said:

See if it’s a slow of fast leak. Mine had a slow leak will take close to 8mths to leak. Some pin hole on the evaporator. Decided change. Didn’t want to keep topping up even though it was cheaper even in the long run. OCD!  Was $400 at L&kim vs top up $20 each time. 🤣

very troublesome lah. unless it's like some connector/hose leaking.

Aircon fail is really a torture in our climate.

Once aircon got problem, i'd just change immediately. Who got so much time to keep going for refrigerant gas top off. 

 

Edited July 24, 2025 by Lala81

[Beregond]

On 7/24/2025 at 12:01 PM, Yeobh said:

Vehicle Cooling system reverse flushing with water and compressed air  - is this service of any use ??

This is not for flushing when the whole ac system is installed and working properly. 

This 1 is more for part by part flushing/cleaning. Sometimes when the compressor damage. It produce alot of aluminium dust when mix with the oil. It become silver colour oil. If this happen the whole system is corrupted. Some time owner want to save and dun want replace whole set.

So WS will use a similar device to flush and clean each part.

Normally thinner is use instead of water

 

[Yeobh]

 

[mersaylee]

I see where to load and ready...😁

[RH1667]

On 7/23/2025 at 2:10 PM, Mkl22 said:

but why need to flush AC? which mechanic tell you one? Do you also flush home AC?😁

 

On 7/23/2025 at 2:41 PM, Beregond said:

Flush ac 15 mins🤔🤔🤔that is super fast.

I remember last time flushing took 40 mins.

Maybe now modern machine already 

 

On 7/23/2025 at 2:41 PM, Beregond said:

Flush ac 15 mins🤔🤔🤔that is super fast.

I remember last time flushing took 40 mins.

Maybe now modern machine already 

 

On 7/23/2025 at 5:03 PM, Beregond said:

Actually flushing of AC system.  Its really up to Indv.

WS theory is if we need to change engine oil. Auto oil. Then inside the ac system there are oil also . Why dun need change?

Make sense? But the machine for flushing AC system is only popular from around 10 or 15  years ago. 

Some machine got a transparent cup. U can see your old and dirty oil being suck out slowly. Then new oil pump in. Most owner that love their car like their wife will love the feeling.

But there is a catch. When they flush or suck out your old compressor oil. There is a strong vacuum force at work.

If your car is old and certain jap and kimchi model where the cooling coil is thin. 

After u flush your ac system . The cooling coil leak instead.

 

On 7/23/2025 at 7:04 PM, Mkl22 said:

Workshop load of crock! Engine oil is different. There are combustion gases and blow by plus the temperature is many times higher. 
I would liken compressor oil to be more like rear differential. But the wear is also very much less. 
home Aircon works for much longer hours. My home Aircon on original factory charge gas and on every day for 10hrs for 5years. 
also like @Gnahp said, fridge? Got change ah? You should ask workshop. My fridge work 24/7 for the last 15years…. How? 

that’s why I say many but not all local mechanics and workshops are shit. Uneducated ones spouting nonsense and selling snake oil.

Flushing like you said only became popular last 15years. Cause already spent $$ to buy the machine, of course must come up with some cock story to recoup ROI.
 🤣

OK, thanks to all for sharing the feedback regarding air con flushing and change of air con oil. 

Anyway, besides the flushing, was also told my air gas drop by 20% and got it top up.  

[Yeobh]

If you have to flush your car hydraulic brake system ,which mode of flushing will you opt - Pressure or vacuum flushing ?

[Mkl22]

On 7/25/2025 at 3:24 PM, Yeobh said:

If you have to flush your car hydraulic brake system ,which mode of flushing will you opt - Pressure or vacuum flushing ?

Pressure. Have done both. Pressure is easier once properly setup with correct cap. 

[Beregond]

On 7/25/2025 at 9:15 PM, Mkl22 said:

Pressure. Have done both. Pressure is easier once properly setup with correct cap. 

personally i feel pumping is better, the vaccum sucking is for initial stage where there might be alot of air in the system, or for cases when there is only 1 guy working on the brake.

if there is another helper helping to pump the brake, its more effective