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E46 330i 2001 expansion tank cracked
#1
Good evening fellow fanatics. 
My car's expansion tanked cracked this afternoon at home luckily. I need to know is the quality of the expansion tanks at Goldwagen on par or should i get one from BMW? Any advise would be appreciated.
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#2
I bought the Febi Bilstein replacement tank(red and white box) from Goldwagen, was alot cheaper than the stealerships and readily available iirc.
Just keep the original cap, the replacement cap can seize.

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#3
This happened to me too when I had my 330, except my expansion tank exploded, took it to BMW and they said that the new tanks are much better quality than the ones that were originally fitted to the E46's, but interestingly, they insisted that I replace the cap as well because the old caps were also faulty and that was sometimes the cause of the tanks exploding, due to the cap not releasing pressure the way it was designed to do and prevent an explosion.
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#4
Do not fit a GoldWagen expansion tank, pay the premium and go with OEM on this particular part.
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#5
(04-08-2020, 01:35 PM)KPM3_30 Wrote: Do not fit a GoldWagen expansion tank, pay the premium and go with OEM on this particular part.
Sometimes the premium is too premium. Linking the ridiculous price to the part and the function it serve and its quality makes it a no-brainer for me.
It seems like stealerships can slap any profit mark up on the most demanded products and parts to make up for their ballooning overheads caused by a failed business model. I'd stick it to BMWSA if I could.
For plastic parts like these I'd go to GW every day of the week.

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#6
(04-08-2020, 03:26 PM)Jive_m135i Wrote:
(04-08-2020, 01:35 PM)KPM3_30 Wrote: Do not fit a GoldWagen expansion tank, pay the premium and go with OEM on this particular part.
Sometimes the premium is too premium. Linking the ridiculous price to the part and the function it serve and its quality makes it a no-brainer for me.
It seems like stealerships can slap any profit mark up on the most demanded products and parts to make up for their ballooning overheads caused by a failed business model. I'd stick it to BMWSA if I could.
For plastic parts like these I'd go to GW every day of the week.

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To each their own.. I am an avid fan of doing research before buying a product, I would always consider a reputable aftermarket replacement before buying an OEM part from the dealer. In certain cases, I stick to OEM because I have had past experiences that steer me away from the generic crap that exists out there. 

The most critical and compromised part of the E46 cooling system is by and large, the expansion tank. This particular part failure would have catastrophic consequences for the car's engine if it failed, it is not just a plastic part. Remember, the heat gauge on an E46 is a buffered one, by the time it starts getting to the red, your engine is already on the way to overheating.. This is the end for a car with an aluminium block.

I know of many GoldWagen expansion tanks that have failed on the E46, the latest one being a few weeks ago on a 330i (the tank was <12 months old). I would rather spend the premium and have peace of mind, especially on this critical component, than save a few bucks and have to redo the whole exercise when it inevitably fails... Also spare a thought for the inconvenience and safety risk, when you consider what failure means when you are out on the road. Been there, done that and my advice is, pay the premium.
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#7
(04-08-2020, 03:36 PM)KPM3_30 Wrote:
(04-08-2020, 03:26 PM)Jive_m135i Wrote:
(04-08-2020, 01:35 PM)KPM3_30 Wrote: Do not fit a GoldWagen expansion tank, pay the premium and go with OEM on this particular part.
Sometimes the premium is too premium. Linking the ridiculous price to the part and the function it serve and its quality makes it a no-brainer for me.
It seems like stealerships can slap any profit mark up on the most demanded products and parts to make up for their ballooning overheads caused by a failed business model. I'd stick it to BMWSA if I could.
For plastic parts like these I'd go to GW every day of the week.

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To each their own.. I am an avid fan of doing research before buying a product, I would always consider a reputable aftermarket replacement before buying an OEM part from the dealer. In certain cases, I stick to OEM because I have had past experiences that steer me away from the generic crap that exists out there. 

The most critical and compromised part of the E46 cooling system is by and large, the expansion tank. This particular part failure would have catastrophic consequences for the car's engine if it failed, it is not just a plastic part. Remember, the heat gauge on an E46 is a buffered one, by the time it starts getting to the red, your engine is already on the way to overheating.. This is the end for a car with an aluminium block.

I know of many GoldWagen expansion tanks that have failed on the E46, the latest one being a few weeks ago on a 330i (the tank was <12 months old). I would rather spend the premium and have peace of mind, especially on this critical component, than save a few bucks and have to redo the whole exercise when it inevitably fails... Also spare a thought for the inconvenience and safety risk, when you consider what failure means when you are out on the road. Been there, done that and my advice is, pay the premium.


I'd follow this advice
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#8
michael.joseph Wrote:
KPM3_30 Wrote:
Jive_m135i Wrote:
KPM3_30 Wrote:Do not fit a GoldWagen expansion tank, pay the premium and go with OEM on this particular part.
Sometimes the premium is too premium. Linking the ridiculous price to the part and the function it serve and its quality makes it a no-brainer for me.
It seems like stealerships can slap any profit mark up on the most demanded products and parts to make up for their ballooning overheads caused by a failed business model. I'd stick it to BMWSA if I could.
For plastic parts like these I'd go to GW every day of the week.

Sent from my SM-G975F using Tapatalk

To each their own.. I am an avid fan of doing research before buying a product, I would always consider a reputable aftermarket replacement before buying an OEM part from the dealer. In certain cases, I stick to OEM because I have had past experiences that steer me away from the generic crap that exists out there. 

The most critical and compromised part of the E46 cooling system is by and large, the expansion tank. This particular part failure would have catastrophic consequences for the car's engine if it failed, it is not just a plastic part. Remember, the heat gauge on an E46 is a buffered one, by the time it starts getting to the red, your engine is already on the way to overheating.. This is the end for a car with an aluminium block.

I know of many GoldWagen expansion tanks that have failed on the E46, the latest one being a few weeks ago on a 330i (the tank was <12 months old). I would rather spend the premium and have peace of mind, especially on this critical component, than save a few bucks and have to redo the whole exercise when it inevitably fails... Also spare a thought for the inconvenience and safety risk, when you consider what failure means when you are out on the road. Been there, done that and my advice is, pay the premium.


I'd follow this advice
Me to, cooling systems are critical.
I remember when doing the preventative cooling maintenance on my Z, I could get a an aftermarket pump for R1150 I instead saved up and got the Pierburg , which  was 4 times more but OEM, same with the thermostat, I got an OEM for R1200 as BMW had a special, aftermarkets weren't that much cheaper at R800, id spend more and have peace of mind.
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#9
Hello all thank you for the advice, but i bought the moto euro tank from Goldwagen. I know that not all will approve my choice. The problem i have is i have replaced the tank and bled the system, now my coolant light stays on on my dashboard and it is yellow. I bled it in two ways with the ignition on and topped the coolant until there was a constant flow from the bleeder screw hole. I then started the engine and switched on the heater to its highest temperature and the air turned warm and the heat gauge stayed in the middle. What would cause the yellow coolant light to stay on in my dashboard?

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#10
The plot thickens...

If theres a coolant light is it not thermostat related?

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#11
(04-08-2020, 05:03 PM)Gert Moller Wrote: Hello all thank you for the advice, but i bought the moto euro tank from Goldwagen. I know that not all will approve my choice. The problem i have is i have replaced the tank and bled the system, now my coolant light stays on on my dashboard and it is yellow. I bled it in two ways with the ignition on and topped the coolant until there was a constant flow from the bleeder screw hole. I then started the engine and switched on the heater to its highest temperature and the air turned warm and the heat gauge stayed in the middle. What would cause the yellow coolant light to stay on in my dashboard?

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So on the actual issue, yellow light is coolant level sensor that fits to the expansion tank, make sure its connected properly. 

Second point the moto euro parts from goldwagen are absolutely shit. The Febi bilstein part is the one to go for from Goldwagen with an OEM cap
Current rides
1995 E36 325i [Unfinished Monalisa]
2003 E46 M3 (Blitz) 
2004 E46 330D M-sport [167wkw 556nm]

Ex Rides
1998 160i Conquest Rs
2012 Yamaha FZ6R - Stock
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#12
(04-08-2020, 05:57 PM)Nikhil Wrote:
(04-08-2020, 05:03 PM)Gert Moller Wrote: Hello all thank you for the advice, but i bought the moto euro tank from Goldwagen. I know that not all will approve my choice. The problem i have is i have replaced the tank and bled the system, now my coolant light stays on on my dashboard and it is yellow. I bled it in two ways with the ignition on and topped the coolant until there was a constant flow from the bleeder screw hole. I then started the engine and switched on the heater to its highest temperature and the air turned warm and the heat gauge stayed in the middle. What would cause the yellow coolant light to stay on in my dashboard?

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So on the actual issue, yellow light is coolant level sensor that fits to the expansion tank, make sure its connected properly. 

Second point the moto euro parts from goldwagen are absolutely shit. The Febi bilstein part is the one to go for from Goldwagen with an OEM cap
Should i return and take the more expensive tank?

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#13
(04-08-2020, 05:57 PM)Nikhil Wrote:
(04-08-2020, 05:03 PM)Gert Moller Wrote: Hello all thank you for the advice, but i bought the moto euro tank from Goldwagen. I know that not all will approve my choice. The problem i have is i have replaced the tank and bled the system, now my coolant light stays on on my dashboard and it is yellow. I bled it in two ways with the ignition on and topped the coolant until there was a constant flow from the bleeder screw hole. I then started the engine and switched on the heater to its highest temperature and the air turned warm and the heat gauge stayed in the middle. What would cause the yellow coolant light to stay on in my dashboard?

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So on the actual issue, yellow light is coolant level sensor that fits to the expansion tank, make sure its connected properly. 

Second point the moto euro parts from goldwagen are absolutely shit. The Febi bilstein part is the one to go for from Goldwagen with an OEM cap
Nikhil has the vision

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#14
Me thinks ..In life ... you get what you pay for
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#15
Good morning.
Could the ratio of coolant to distilled water have an imapct on the sensor? What is the correct ratio to use?

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#16
and buy a new cap! the cap is very important
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#17
(05-08-2020, 08:36 AM)Gert Moller Wrote: Good morning.
Could the ratio of coolant to distilled water have an imapct on the sensor? What is the correct ratio to use?

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No it won't, it should be a 50/50 mix
Current rides
1995 E36 325i [Unfinished Monalisa]
2003 E46 M3 (Blitz) 
2004 E46 330D M-sport [167wkw 556nm]

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2012 Yamaha FZ6R - Stock
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#18
(05-08-2020, 09:09 AM)Nikhil Wrote:
(05-08-2020, 08:36 AM)Gert Moller Wrote: Good morning.
Could the ratio of coolant to distilled water have an imapct on the sensor? What is the correct ratio to use?

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No it won't, it should be a 50/50 mix
I remember picking up my E46, the previous owner just kept on putting the BMW coolant straight into the tank without mixing with water LOL! Definitely needed a cooling system refresh XD

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#19
If your coolant sensor goes on, there is only 2 things that could be wrong:
1. The sensor, cable or something with the sensor is faulty. Especially if it is on as soon as the car is on.
2. There is air in the system, and as soon as the system starts working, the light goes on because when it builds pressure while working, the level actually do drop.

I once had this issue it would go on after starting to drive. Was annoying, blead it many times. Eventually gave up and just dropped all the coolant out of the system, did a nice flush to clean it out, and started over. I also decided I had enough and just replaced the tank again with proper oem one. After that the issue was solved.

One way to test your sensor, swap the expansion tank sensor and the water bottle for washing windscreen sensors around. Its the same sensor. If sensor is faulty, the error should move to the water bottle for windscreen light on the dash.
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#20
(05-08-2020, 09:13 AM)Tinuva Wrote: If your coolant sensor goes on, there is only 2 things that could be wrong:
1. The sensor, cable or something with the sensor is faulty. Especially if it is on as soon as the car is on.
2. There is air in the system, and as soon as the system starts working, the light goes on because when it builds pressure while working, the level actually do drop.

I once had this issue it would go on after starting to drive. Was annoying, blead it many times. Eventually gave up and just dropped all the coolant out of the system, did a nice flush to clean it out, and started over. I also decided I had enough and just replaced the tank again with proper oem one. After that the issue was solved.

One way to test your sensor, swap the expansion tank sensor and the water bottle for washing windscreen sensors around. Its the same sensor. If sensor is faulty, the error should move to the water bottle for windscreen light on the dash.
I swapped the sensors as suggested and the waterbottle light came on. I put in the old sensor and the coolant light isn't on anymore. Thank you for the advice. I am a bit sceptical about the expansion tank after you guys said that moto euro is crap


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