heres the problem, i recently put a 3" catback and a helix dp. i replaced the coolant in the radiator the other day. while replenishing the coolant in the radiator, i filled the radiator and the resivor tank to its capacity and then let the car run for about 5-10 min. coolant in resivor tank gets low. no problem fill it right up. took the car out the next day only drove the car for 10 min checked the coolant again and the resivor tank is half empty again. i keep having to add coolant. can anyone give me some info to whats going on? thanks

 

are you filling it to the top... your only supposed to fill it to the fill line...you have to have room for the coolant to expand and contract...read your manual..

 

yes i am only filling it to the fill line

 

Air pocket?

 

well if it keeps overflowing, get a pressure test done on the cooling system.. most likely it will be a head gasket or cracked head..

 

$hit, hope nothing is wrong cause i just bought the car last month. the car only has 1500 miles.

 

do you have signs of overflow?

i had to keep adding to mine after i drained it too.
it just took 2 or 3 times to get it done

 

wait are you driving it for 10 minutes then waiting for the car to cool? u know the reservoir will get low when the car is hot....

 

don't forget, that when you drain your coolant, and then fill it back up, there is space in the engine as well as the hoses. i wouldn't worry too much unless you have white smoke from your exhaust or unless your oil turns milky. just keep filling a little @ a time.

 

currently there are no signs of overflow. ill drive the car for another couple of days and keep an eye out on the coolant.

 

currently have the same problem...every morning i have to add a little water.
but I have noticed mine overflowing after spirited driving. and even after it cools down..it's pretty low.

 

when you are changing your coolant, you should fill it to top it off, and let it run for 10 to 15 min. until you're t-stat opens. the top hose and bottom hose should be same temp.. making sure u dont have air bubbles,keep squeezing the hoses till its gone. shut it off. check your resevoir and fill it to the line if its low.

 

sounds like u have air in coolant system did u try bleedin' it