Coolant runs through the air compressor to keep it from overheating. If the air compressor head gasket blows it will blow bubbles into the coolant system. It's rare, but it happens.
Bubbles in coolant reservoir
Discussion in 'Volvo Forum' started by JPSIPPY, Jun 13, 2019.
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ProfessionalNoticer, Bean Jr., JPSIPPY and 1 other person Thank this.
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Ok i think we got the air compressor thing covered twice now. Im taking people want an apology for my information screw up so i dont get quoted for a third time ? Sorry about not thinking on that aspect
Bean Jr. and Rideandrepair Thank this. -
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Bean Jr. and Rideandrepair Thank this.
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Cam Roberts Thanks this.
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But thing is when mech at dealership overfill reservoir above max bubbles disappear. They change both caps on reservoir.
So far I'm convinced with reply from Rideandrepair guy.also it's kind of good news for me thinking about expensive repairs.Last edited: Jun 15, 2019
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As the one post sort of explained.
If the caps go bad. They won't hold pressure and reduced boiling point occurs. If there's no catch then it overflows to the ground. Loss of coolant. -
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Just for info, With an Isx you can get bubbles and have the coolant pushed out if the air compressor is worn. It happened to me and it took for ever to get the shop to replace the compressor. After screwing around with expansion tanks and the cap changing the compressor solved the problem of bubbles and coolant being dumped on the ground..
Bean Jr. Thanks this.
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