Water sloshing sound when starting, ford fiesta mk6 2007

[klaudmjj]

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.

[Neil1210]

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. 

[Neil1210]

Get the system pressure tested. 

[klaudmjj]

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.

[Guy Heaton]

Sure it's not the aircon?  That can gurgle too.

[Kevin#95]

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.

[klaudmjj]

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?

[Tiexen]

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.

[klaudmjj]

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?

[TomsFocus]

It'll probably be the coolant reservoir, they're prone to failure on the Mk6.

The cap will most likely want replacing too.

 

[Tiexen]

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

[klaudmjj]

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.