leaking antifreeze and knocking sound

[courtney615]

We have had to add antifreeze to our land rover over the past two weeks (approx. 3 gallons). We can't find the leak at all. Today when I started it up a clicking/knocking sound was evident. Any idea what this could be? Thanks!

[JonS]

Well, all that antifreeze must be going somewhere!

If it 's not on the driveway, it's probably going down the exhaust pipe, and a compression check is the next step.

Mind you, if you are getting mechanical noises, check the dipstick first - just in case your oil has been diluted with 3 gallons of antifreeze. Also worth checking for play on the fan / waterpump as sometimes not too much play can result in fans making contact with cowlings.

Good hunting

Jon

[NeilB]

Well, if your water pump start to fail the first thing to escape is steam....howver, 3 gallons is a lot of steam!
If you have not seen water on the driveway and you are not blowing lots of white smoke then the water is going into the oil - time for an oil change.

has this already been said :)