# Radiator leak **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chevrolet, tahoe\ **Created:** [November 4, 2010, 4:49am UTC](https://community.cartalk.com/t/radiator-leak/57164 "2010-11-04T04:49:41Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![karina0828](https://avatars.discourse-cdn.com/v4/letter/k/8dc957/32.png) [@karina0828](https://community.cartalk.com/u/karina0828)\ **Post date:** [November 4, 2010, 4:49am UTC](https://community.cartalk.com/t/radiator-leak/57164/1 "2010-11-04T04:49:41Z")
i can’t find way to stop leak from radiator. I bought after market radiator and when my 1997 tahoe warms up it starts leaking from the cap. I tried replacing cap wih new one but it still keeps leaking from there like if its not sealing right. Any sugggestions? ---
**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\ **Post date:** [November 4, 2010, 11:08am UTC](https://community.cartalk.com/t/radiator-leak/57164/2 "2010-11-04T11:08:52Z")
How many miles on that 1997? You are not going to like this, but I am suspecting an internal engine problem. Have someone use a sniffer to see if exhaust gases are getting into the cooling system. ---
**Author:** ![waterboy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/waterboy/32/764_2.png) [@waterboy](https://community.cartalk.com/u/waterboy)\ **Post date:** [November 4, 2010, 11:52am UTC](https://community.cartalk.com/t/radiator-leak/57164/3 "2010-11-04T11:52:54Z")
It sounds like you just replaced the radiator? Check the filler neck on the radiator, maybe there is a lump of something that should not be there. ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [November 4, 2010, 12:01pm UTC](https://community.cartalk.com/t/radiator-leak/57164/4 "2010-11-04T12:01:00Z")
How much pressure is on the cap? ---
**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\ **Post date:** [November 4, 2010, 1:00pm UTC](https://community.cartalk.com/t/radiator-leak/57164/5 "2010-11-04T13:00:41Z")
sounds like cooling system being overpressurized. Take Josephs advice and have it tested for blown head gasket. ---
**Author:** ![karina0828](https://avatars.discourse-cdn.com/v4/letter/k/8dc957/32.png) [@karina0828](https://community.cartalk.com/u/karina0828)\ **Post date:** [November 4, 2010, 2:18pm UTC](https://community.cartalk.com/t/radiator-leak/57164/6 "2010-11-04T14:18:34Z")
i have 167000 miles on the tahoe and it does not overheat. if i drive it down to the store when i get back it starts leaking from cap, but like i said it is not even close to the half way mark on the temperature gauge