klaudmjj Posted July 14, 2020 Share Posted July 14, 2020 Hi, recently I've noticed a water sloshing around when I start the car. Seems to dissapear or go less noticeable after I start it. Read about it online and its due to air inside the system, meaning there is a leak somewhere. Checked the coolant reservoir, its below minimum marking. Engine temp is normal. I don't see any puddles of coolant underneath my car. Where could this leak be or where is a good place to start looking. Quote Link to comment Share on other sites More sharing options...
Neil1210 Posted July 14, 2020 Share Posted July 14, 2020 I had this on my last car. It ended up being a blown head gasket. My car never over heated but no matter how many times I topped the coolant up it went down. I ended up. Every time I heard the water I would top it up. Quote Link to comment Share on other sites More sharing options...
Neil1210 Posted July 14, 2020 Share Posted July 14, 2020 Get the system pressure tested. Quote Link to comment Share on other sites More sharing options...
klaudmjj Posted July 14, 2020 Author Share Posted July 14, 2020 35 minutes ago, Neil1210 said: I had this on my last car. It ended up being a blown head gasket. My car never over heated but no matter how many times I topped the coolant up it went down. I ended up. Every time I heard the water I would top it up. I don't think its the head gasket, oil is the correct colour and there isnt any mis fires, smoke or anything that could indicate a blown head gasket. Quote Link to comment Share on other sites More sharing options...
Guy Heaton Posted July 14, 2020 Share Posted July 14, 2020 Sure it's not the aircon? That can gurgle too. Quote Link to comment Share on other sites More sharing options...
Kevin#95 Posted July 14, 2020 Share Posted July 14, 2020 Good advice from Neil. Pressure test each cylinder. One might have a split in the gasket allowing air on the compression stroke to be pushed into the water coolant. This will have a lower pressure when compared to the others. Quote Link to comment Share on other sites More sharing options...
klaudmjj Posted July 14, 2020 Author Share Posted July 14, 2020 26 minutes ago, Guy Heaton said: Sure it's not the aircon? That can gurgle too. I dont think it would be the aircon. I dont have aircon enabled as I start the car. 15 minutes ago, Kevin#95 said: Good advice from Neil. Pressure test each cylinder. One might have a split in the gasket allowing air on the compression stroke to be pushed into the water coolant. This will have a lower pressure when compared to the others. Any compression tester would work? Quote Link to comment Share on other sites More sharing options...
Tiexen Posted July 15, 2020 Share Posted July 15, 2020 13 hours ago, klaudmjj said: Hi, recently I've noticed a water sloshing around when I start the car. Seems to dissapear or go less noticeable after I start it. Read about it online and its due to air inside the system, meaning there is a leak somewhere. Checked the coolant reservoir, its below minimum marking. Engine temp is normal. I don't see any puddles of coolant underneath my car. Where could this leak be or where is a good place to start looking. Worth checking the door drain holes (prod with a paperclip) I had a Fiesta that had water build up inside the door - once you star the car it may just not be noticable - even if its not its worth doing. Quote Link to comment Share on other sites More sharing options...
klaudmjj Posted July 15, 2020 Author Share Posted July 15, 2020 6 hours ago, Tiexen said: Worth checking the door drain holes (prod with a paperclip) I had a Fiesta that had water build up inside the door - once you star the car it may just not be noticable - even if its not its worth doing. where are the drain holes located? Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted July 15, 2020 Share Posted July 15, 2020 It'll probably be the coolant reservoir, they're prone to failure on the Mk6. The cap will most likely want replacing too. Quote Link to comment Share on other sites More sharing options...
Tiexen Posted July 15, 2020 Share Posted July 15, 2020 3 hours ago, klaudmjj said: where are the drain holes located? You need to look on the underside of the doors near the rubber seal on the inside - you'll see the drain holes - just prod them with an unbent paper clip Quote Link to comment Share on other sites More sharing options...
klaudmjj Posted July 15, 2020 Author Share Posted July 15, 2020 Update: Just flushed and filled the system with brand new coolant. While i was underneath taking the hose off to flush the system, I saw that my oil pan screws are stained pink, i looked up and the thermostat is leaking, not a lot, I would say I lost about 500ml of coolant over 3 months. How hard is the thermostat to replace? The coolant reservoir is okay, it holds pressure. Might put some rad weld to see how that goes. Edit: Just looked it up and it possibly is the thermostat housing which needs replacing. Quote Link to comment Share on other sites More sharing options...
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