02 300M 3.5L HO-OverHeating

Reply Subscribe

Thread Tools

Search this Thread

Jun 2, 2019 | 08:20 AM

Burn59

Thread Starter

Junior Member

Joined: Jun 2019

Posts: 2

02 300M 3.5L HO-OverHeating

I have a 2002 300M 3.5L HO the other day it over heated to the red...I didn't notice till it set a code and dinged...
Luckily I was less than a half block from home...when I opened the hood ...I discovered a crack in the tank reservoir
spraying coolant...I got a replacement online changed it out and added some universal coolant less than half a gallon!
I did open the bleed valve while adding coolant it was a steady flow no bubbles, but now the car overheats under driving conditions very fast 10-15 minutes it's fine idling but driving it goes up past half quickly but if I crank the heat it comes back down to half, is there another issue or just air in the system

Jun 2, 2019 | 01:47 PM

CHRYSLER TECH

Super Moderator

Joined: Mar 2006

Posts: 9,135

From: Norcross GA

prob warped the heads

Jun 3, 2019 | 05:41 AM

FIREM

Senior Member

Joined: Sep 2012

Posts: 534

From: Myrtle Beach SC

Heads and head gaskets are vert robust on the 3.5. Anyone that advises heads or gaskets first needs to learn how to properly troubleshoot and diagnose rather than throw parts>