Hi new to this forum! i have a 1996 jeep cherokee 2.5td sport,the problem i have is i top the water up and when i shut the engine off i hear a suck noise and the water dissapears down into the bottle not sure how far down but it does seem to bubble a bit when the jeep is ticking over is this normal? or is it the headgasket on the way out? also its a bitch to start when cold after its been started it fires straight away and all the heaters work fine there is no white in the oil etc,etc any help is appreciated thanks guys!!