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Author Topic: Vacuum in coolant system  (Read 1859 times)

February 11, 2015, 11:33:58 am

nissannx

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Vacuum in coolant system
« on: February 11, 2015, 11:33:58 am »
92 jetta 1.6 na

When I top up my coolant every 2-3 weeks it is really hard to take the cap off then coolant rushes back into the reservoir.

What causes the vacuum?
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Reply #1February 11, 2015, 01:29:37 pm

burn_your_money

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Re: Vacuum in coolant system
« Reply #1 on: February 11, 2015, 01:29:37 pm »
Sounds like a faulty cap to me.

As the system cools down, it depressurizes and the cap is suppose to open to let the vacuum out.

I think VWs do this anyways...
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Tyler
Reply #2February 11, 2015, 02:25:03 pm

nissannx

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Re: Vacuum in coolant system
« Reply #2 on: February 11, 2015, 02:25:03 pm »
It's the blue cap. Brand new 4 months old max
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Reply #3February 11, 2015, 02:30:19 pm

RunninWild

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Re: Vacuum in coolant system
« Reply #3 on: February 11, 2015, 02:30:19 pm »
caps are cheap, I'd grab another and see if it fixes the problem.
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