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2002 Eurovan DIY coolant change
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PostPosted: Wed Aug 19, 2015 11:15 am    Post subject: 2002 Eurovan DIY coolant change Reply with quote

A little bit lame to merit a DIY but, too bad..here goes.

G12 coolant is advertised as lifetime, but I change every 4-5 years (low miles on my EV, like 3k per year.)

This is a really nice coolant change.

Cold engine

Drop 4 M6 bolts to lower engine pan

Up high, left side of engine, is a coolant drain plug which unscrews by hand. Its got a nice o-ring seal which pops into the a seal groove.





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Drain coolant into bucket.

Now put hose into reservoir and turn on

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Check flow through drain port


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Start car, let run for 30 minutes with water coming from both drain port and overflow reservoir. Resist the temptation to surf Samba while you are doing this, in case the hose flops out and you then burn up your EV.

I added 4.0 of VW G12 coolant after replacing plug, then it took 4.0 liters of water to top off I calculate the dead volume of 1.0 liter for a total freeze protection to -15F

All data told me to run the car at 2000 rpm for 3 minutes and then recheck level - I found no change. I took it for a highway spin of 10 minutes and found no change.
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kenney158
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PostPosted: Sun Nov 29, 2015 6:57 pm    Post subject: Re: 2002 Eurovan DIY coolant change Reply with quote

Thanks. My coolant overflowed recently when the belt tensioner pulley froze and shredded the belt. Need to refill. Since I had a reman engine installed only 1k miles ago I'm assuming I don't need to do the flush part.

Want to make sure I understand. I should start the van while the hose is running only water into the cooling system? I guess this means there's no overflow until the system is filled with water. Makes me a little nervous to start the engine with the system open.
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PostPosted: Wed Dec 02, 2015 5:05 am    Post subject: Re: 2002 Eurovan DIY coolant change Reply with quote

Yes, this is to flush. Run the wate r until it fills before you start..takes about 20 seconds. Make sure you have water coming from the drain plug and coming out of the top of the reservoir to flush. Idle speed only.
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Scottn59c
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PostPosted: Tue Feb 13, 2018 11:02 am    Post subject: Re: 2002 Eurovan DIY coolant change Reply with quote

Earlier question today got me wondering: Do you have to do any bleeding of the system by opening a bleeder screw or is the system self-bleeding?
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PostPosted: Tue Feb 13, 2018 7:55 pm    Post subject: Re: 2002 Eurovan DIY coolant change Reply with quote

I found it self bleeding. I just topped it up at idle, put the cap on, took it for a short spin, no change in level.

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All data told me to run the car at 2000 rpm for 3 minutes and then recheck level - I found no change. I took it for a highway spin of 10 minutes and found no change.

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PostPosted: Sun Feb 18, 2018 2:54 pm    Post subject: Re: 2002 Eurovan DIY coolant change Reply with quote

Scottn59c wrote:
Earlier question today got me wondering: Do you have to do any bleeding of the system by opening a bleeder screw or is the system self-bleeding?


I just finished draining and replacing the coolant on my 2001 EVC. The main job was putting in a transmission cooler so I drained the coolant first to keep it a bit neater.
Afterwards, it took at least fifteen minutes of running the engine and driving it around the block before the heat started working again, despite normal coolant temperature. I suspect that there was air in the heater core. While the car was warming up I periodically removed the coolant reservoir cap to allow air out, which seemed to help.
So yes, it does "self bleed," but in my experience it can take a while and you'll want to let the air out and refill the reservoir.
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