# Heater core is bad, trying to fix before replacing it..... **URL:** \ **Category:** Shift518 Automotive\ **Created:** [December 4, 2008, 10:16am UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560 "2008-12-04T10:16:52Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![GermanPSI](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/germanpsi/32/6353_2.png) [@GermanPSI](https://forums.speedlife.net/u/GermanPSI)\ **Post date:** [December 4, 2008, 10:16am UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/1 "2008-12-04T10:16:52Z")
Well the heater core is bad in my car and thought before i take the whole thing apart i might as well try to fix the clog. Yesterday i put some drano in there and pressue washed it out, the heat in the car got better but still isnt HOT. Anyone know of some safe stuff that will break up the clog without melting the core? ---
**Author:** ![big\_red](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/big_red/32/6328_2.png) [@big\_red](https://forums.speedlife.net/u/big_red)\ **Post date:** [December 4, 2008, 11:16am UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/2 "2008-12-04T11:16:36Z")
its prob not what you wanna hear but I would replace it before it gets REAL cold. Having no heat in the winter would suck. ---
**Author:** ![tdi\_logik](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tdi_logik/32/6310_2.png) [@tdi\_logik](https://forums.speedlife.net/u/tdi_logik)\ **Post date:** [December 4, 2008, 11:28am UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/3 "2008-12-04T11:28:51Z")
they’ve got that super flush prestone shit you hook a hose up to it. i’d just try that again and again… ask PAUL… he’s been having issues with his and i think he fixed it. glad you figured out what the issue is cause i asked the kid and no reply :sad ---
**Author:** ![PJB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pjb/32/6389_2.png) [@PJB](https://forums.speedlife.net/u/PJB)\ **Post date:** [December 4, 2008, 12:01pm UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/4 "2008-12-04T12:01:07Z")
Mine was a ripped hose. I had a bad heater core in my old truck and my Mustang and theres no real way to fix it other than replacing it. Both of them leaked. ---
**Author:** ![psi2high](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/psi2high/32/6320_2.png) [@psi2high](https://forums.speedlife.net/u/psi2high)\ **Post date:** [December 4, 2008, 12:01pm UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/5 "2008-12-04T12:01:49Z")
You is foooked ---
**Author:** ![1stgen](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1stgen/32/6288_2.png) [@1stgen](https://forums.speedlife.net/u/1stgen)\ **Post date:** [December 4, 2008, 12:25pm UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/6 "2008-12-04T12:25:36Z")
1- is it climatronic? 2- is it a v-6? If you answered yes to any of the above then see line 3 3- your core isn’t plugged it has a hole in it and needs to be replaced 4- ask me how i know :mwahaha ---
**Author:** ![psi2high](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/psi2high/32/6320_2.png) [@psi2high](https://forums.speedlife.net/u/psi2high)\ **Post date:** [December 4, 2008, 12:39pm UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/7 "2008-12-04T12:39:14Z")
It is a 2.8 5 speed ---
**Author:** ![1stgen](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1stgen/32/6288_2.png) [@1stgen](https://forums.speedlife.net/u/1stgen)\ **Post date:** [December 4, 2008, 1:02pm UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/8 "2008-12-04T13:02:11Z")
Then it is a 90% chance the heater core is leaking, or a 10% chance the climatronic unit is fuct up Does the a/c stay on even though it’s in heat mode? Or do you just not get heat while moving but idle is ok? Lower rad hose hot? T-stat working? I can keep going, this is why you can’t really get help on a forum. ---
**Author:** ![psi2high](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/psi2high/32/6320_2.png) [@psi2high](https://forums.speedlife.net/u/psi2high)\ **Post date:** [December 4, 2008, 1:15pm UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/9 "2008-12-04T13:15:50Z")
It may be his climate control because randomly the sunroof will pop open ---
**Author:** ![GermanPSI](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/germanpsi/32/6353_2.png) [@GermanPSI](https://forums.speedlife.net/u/GermanPSI)\ **Post date:** [December 4, 2008, 10:43pm UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/10 "2008-12-04T22:43:53Z")
> [@1stgen](#): > > 1- is it climatronic? > 2- is it a v-6? > If you answered yes to any of the above then see line 3 > 3- your core isn’t plugged it has a hole in it and needs to be replaced > 4- ask me how i know :mwahaha If it had a hole in it wouldnt it smell like coolant when i had the blower on, also steamy windows? ---
**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\ **Post date:** [December 5, 2008, 1:36am UTC](https://forums.speedlife.net/t/heater-core-is-bad-trying-to-fix-before-replacing-it/240560/11 "2008-12-05T01:36:42Z")
the heat doesnt work at idle, but at constant load around 3k+ he said hes good.