XC90 Mystery Coolant Issue

jtwarne · Post by **jtwarne** » 31 Mar 2011, 14:03

My 2005 XC90 2.9 is using a ton of coolant; refilling every week. If the "low coolant" message wouldn't come on, I would not know there was an issue. Car runs fine (even in cold MN winter), no funky smells or smoke, temperature gauge is normal, never overheated, no check engine messages. Brought it to the dealer 4 times for this. The pressure test was fine 2 times. Nothing in the oil, no puddles under the car, no leaks detected when car is idle. They're not sure what's the matter. 60k miles (all city driving), no warranty, original owner...ideas?

Post by **jimmy57** » 31 Mar 2011, 14:26

Does it ever run rough on restart after driven for 30 or more minutes and then shut off 20-40 minutes and then started again?

The Blue Whale · Post by **The Blue Whale** » 01 Apr 2011, 07:03

Could it be collecting in your skid plate and not dripping out until your car is in motion? I had a v70 one time that had a tiny leak in the radiator that was unnoticable unless I left the car parked for a long period of time. The leak would just collect in the air dam and stay there until I moved the car.

mgjonesin · Post by **mgjonesin** » 14 Jun 2011, 08:22

Have the oil tested for coolant (NAPA has a kit you send away to a lab). Mine had the same problem and it was the oil pan mounted oil cooler. I replaced it and the coolant stopped dissapearing. Make sure you change your oil to get fresh oil in there if you find antifreeze in there.

Koala357 · Post by **Koala357** » 29 Jan 2015, 17:03

I Just got my 04' XC90 back for the second time after being pressure tested and oil checked, still can't find why it disappearing. UGH!!! I love my Volvo but please already!

huzzsaba · Post by **huzzsaba** » 01 Feb 2015, 08:30

I hope I am wrong but check out this thread about coolant leaking into the transmission

https://www.matthewsvolvosite.com/forums/viewtopic.php?t=47033&f=9