Radiator flush
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 312
Likes: 106
From: DFW area in TEXAS! 🤠
2018 S450 4Matic, 2021 Toyota Tundra, 2010 GL350 (sold)
Radiator flush
So when I bought the S450, I don’t know for sure who put oil or anything else in it last, so I’m replacing the easier fluids.
Question: Anyone know of a reason I can’t use my new Mityvac to pump out the coolant instead of draining it?
Question: Anyone know of a reason I can’t use my new Mityvac to pump out the coolant instead of draining it?
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 312
Likes: 106
From: DFW area in TEXAS! 🤠
2018 S450 4Matic, 2021 Toyota Tundra, 2010 GL350 (sold)
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 312
Likes: 106
From: DFW area in TEXAS! 🤠
2018 S450 4Matic, 2021 Toyota Tundra, 2010 GL350 (sold)
Here’s where I am puzzled. I only have access to what I would call the overflow container, not the radiator. How do I fill the entire system up and make sure there are no bubbles somewhere there shouldn’t be? I know some systems bleed automatically.
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Joined: Jun 2021
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
Okay thank you! I will look for that. That’s a petcock valve?
Here’s where I am puzzled. I only have access to what I would call the overflow container, not the radiator. How do I fill the entire system up and make sure there are no bubbles somewhere there shouldn’t be? I know some systems bleed automatically.
Here’s where I am puzzled. I only have access to what I would call the overflow container, not the radiator. How do I fill the entire system up and make sure there are no bubbles somewhere there shouldn’t be? I know some systems bleed automatically.
You fill it....and get your buddy with Xentry to run the coolant program on it. It rev's the engine, turns the heat/defroster on and off and cycles through systems for a bit.
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 312
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From: DFW area in TEXAS! 🤠
2018 S450 4Matic, 2021 Toyota Tundra, 2010 GL350 (sold)
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Thread Starter
Senior Member
Joined: Jan 2010
Posts: 312
Likes: 106
From: DFW area in TEXAS! 🤠
2018 S450 4Matic, 2021 Toyota Tundra, 2010 GL350 (sold)
Does anyone know the steps once in Xentry? All I’ve done to date is set that up for BenzNinja to connect. I would image this is an easy process but I haven’t the first clue. I can get to the diagnostic screen and look at any issues.
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Joined: Jul 2023
Posts: 296
Likes: 91
S550 V8, CL600 V12, SLK32 AMG
How I do it, and not saying anyone should follow
- Drive up on ramps
- Take off the middle cover under the car - 8mm bolts
- Take off the front cover - 8mm bolts
- Get a big flat sterilite type plastic container from Walmart
- Loosen the drain in the radiator. Also the cap from the overflow container
- Go get a beer. Come back in 30 min.
- Close the drain
- Get a bucket with 50/50 coolant and something like this
M31 Vacuum Type Cooling System Filler Tool Set - just search on Amazon - $50
There are thousands of them on Amazon. I found that the cone shaped adapter seals best.
- Use compressor and the tool, pull slight vacuum and put coolant back into system.
- Put everything back, start the car, make sure the level is still good.
- Maybe just drive around the block, check level.
- Verify level for about a week. If any air works itself out.
Thats it.
As you drive the car around, put it on heat, so the new coolant works itself in everywhere.
Of course I am not getting every drop of old coolant out, but I do this every year or two so that I don't care.
- Drive up on ramps
- Take off the middle cover under the car - 8mm bolts
- Take off the front cover - 8mm bolts
- Get a big flat sterilite type plastic container from Walmart
- Loosen the drain in the radiator. Also the cap from the overflow container
- Go get a beer. Come back in 30 min.
- Close the drain
- Get a bucket with 50/50 coolant and something like this
M31 Vacuum Type Cooling System Filler Tool Set - just search on Amazon - $50
There are thousands of them on Amazon. I found that the cone shaped adapter seals best.
- Use compressor and the tool, pull slight vacuum and put coolant back into system.
- Put everything back, start the car, make sure the level is still good.
- Maybe just drive around the block, check level.
- Verify level for about a week. If any air works itself out.
Thats it.
As you drive the car around, put it on heat, so the new coolant works itself in everywhere.
Of course I am not getting every drop of old coolant out, but I do this every year or two so that I don't care.
Last edited by waterzap99; Jan 23, 2025 at 05:00 PM.
Senior Member
Joined: Jul 2023
Posts: 296
Likes: 91
S550 V8, CL600 V12, SLK32 AMG
And before anyone says I change my coolant too often.
Neighbor had a Jeep Grand Cherokee, bought new ( I know..Jeep..still). Still had less than 60k on it, only few years old
He had to replace the waterpump. Anyway, when he took it off, that engine had so much pitting on the block, there was no way that was going to seal.
However expensive coolant is, a new engine is way more
Asked him when last he replaced his coolant, he said, never, its not needed.
Ok.....
Neighbor had a Jeep Grand Cherokee, bought new ( I know..Jeep..still). Still had less than 60k on it, only few years old
He had to replace the waterpump. Anyway, when he took it off, that engine had so much pitting on the block, there was no way that was going to seal.
However expensive coolant is, a new engine is way more
Asked him when last he replaced his coolant, he said, never, its not needed.
Ok.....
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 312
Likes: 106
From: DFW area in TEXAS! 🤠
2018 S450 4Matic, 2021 Toyota Tundra, 2010 GL350 (sold)
How I do it, and not saying anyone should follow
- Drive up on ramps
- Take off the middle cover under the car - 8mm bolts
- Take off the front cover - 8mm bolts
- Get a big flat sterilite type plastic container from Walmart
- Loosen the drain in the radiator. Also the cap from the overflow container
- Go get a beer. Come back in 30 min.
- Close the drain
- Get a bucket with 50/50 coolant and something like this
M31 Vacuum Type Cooling System Filler Tool Set - just search on Amazon - $50
There are thousands of them on Amazon. I found that the cone shaped adapter seals best.
- Use compressor and the tool, pull slight vacuum and put coolant back into system.
- Put everything back, start the car, make sure the level is still good.
- Maybe just drive around the block, check level.
- Verify level for about a week. If any air works itself out.
Thats it.
As you drive the car around, put it on heat, so the new coolant works itself in everywhere.
Of course I am not getting every drop of old coolant out, but I do this every year or two so that I don't care.
- Drive up on ramps
- Take off the middle cover under the car - 8mm bolts
- Take off the front cover - 8mm bolts
- Get a big flat sterilite type plastic container from Walmart
- Loosen the drain in the radiator. Also the cap from the overflow container
- Go get a beer. Come back in 30 min.
- Close the drain
- Get a bucket with 50/50 coolant and something like this
M31 Vacuum Type Cooling System Filler Tool Set - just search on Amazon - $50
There are thousands of them on Amazon. I found that the cone shaped adapter seals best.
- Use compressor and the tool, pull slight vacuum and put coolant back into system.
- Put everything back, start the car, make sure the level is still good.
- Maybe just drive around the block, check level.
- Verify level for about a week. If any air works itself out.
Thats it.
As you drive the car around, put it on heat, so the new coolant works itself in everywhere.
Of course I am not getting every drop of old coolant out, but I do this every year or two so that I don't care.
Thread Starter
Senior Member
Joined: Jan 2010
Posts: 312
Likes: 106
From: DFW area in TEXAS! 🤠
2018 S450 4Matic, 2021 Toyota Tundra, 2010 GL350 (sold)
And before anyone says I change my coolant too often.
Neighbor had a Jeep Grand Cherokee, bought new ( I know..Jeep..still). Still had less than 60k on it, only few years old
He had to replace the waterpump. Anyway, when he took it off, that engine had so much pitting on the block, there was no way that was going to seal.
However expensive coolant is, a new engine is way more
Asked him when last he replaced his coolant, he said, never, its not needed.
Ok.....
Neighbor had a Jeep Grand Cherokee, bought new ( I know..Jeep..still). Still had less than 60k on it, only few years old
He had to replace the waterpump. Anyway, when he took it off, that engine had so much pitting on the block, there was no way that was going to seal.
However expensive coolant is, a new engine is way more
Asked him when last he replaced his coolant, he said, never, its not needed.
Ok.....
