i have a cooling system leak and was woundering if i shouldtry this prestone leak stop it says to put in the radiator but i would have to put it in the res. and i dont know if that would be ok cause it has some kinda pellets in it, plus it says to not use in pressurized overflow systems woundering if that is on a 02 a4 1.8t thanks for the help.

 

Where is the leak coming from? I would not suggest using theprestone stop leak, people say only use g12 coolant because of silicates in other kinds of coolant, rust issues, gumming issues, and head gasket problems. You need to determine where the leak is and fix the problem which will end up being cheaper in the long run.

 

yea i just was just thinking before i send it to someonemaybe try this stuffi really dont know where the leak is coming from 1 day i saw a puddel under my car and that was like beginning of summer since then nothing and now the dash says im low agian should it leak out the bottomof the res. cause i was filling it up and missed the center and it went like on the outer part of it but not on the outside still in the cap and it leaked right from there once but someone told me thats the overflow

 

Puddle, usually the only antifreeze leak that causes a puddle without coolant pouring out is a bad water pump.

 

well it was only one time in my drive way that i saw a puddle ive had to fill it about 3 times since that and havent seen anything again

 

Ya, make sure it's not the water pump before anything else.

 

does that thing i mentioned before with the overflow thing make any sense or no cause i saw it come out when i did that

 

i wouldn't suggest using something like that either. find the leak and take care of it. get a good flashlight and search your engine compartment after the car has been well driven. you'll find it. my car had a similiar problem and the leak was coming from the bottom of the overflow bottle. i guess that is a common place for these cars to spring a leak. good luck.

 

yeah if you miss when pouring it's going to spit out the overflow line on the bottom of the res. Stop leak is a bad idea, it may fix a leak...but it will also plug up things it's not supposed to, always seems to get the heater core good and then you will have no heat. Look on the back side of the cylinder head, they have an elbow that likes to leak on the back side of the engine.