I'm not sure how much trouble it is on a slant 6, but I think you'll need to pop the core plugs out of the block and clean out the water jackets to get your car to cool down. The rear most one will probably be the worst, so do that one first - if it looks pretty clean in there, your trouble is elsewhere. You can first try opening the block drain to see if anything comes out. If you have to poke in the hole with a small implement to get the coolant to start running out, you can be pretty sure your block is full of mud and crud. Mopars seem to be worse in this respect than other brands of car, but since yours is 38 years old, I don't think you have a complaint about it anyway. Dick Benjamin ----- Original Message ----- From: ERIC C MARSH <ECMarsh@xxxxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Monday, August 26, 2002 9:49 AM Subject: IML: Running warm I have a MOPAR related question for all you experts. While working on my '56 sedan I've been using my '64 Barracuda slant six factory 4-spd as a daily drive. It runs fine except I think on the warm side with these drought conditions this summer. I've replaced the hoses, water pump and flushed the system. The radiator has been through my radiator shop guy twice for power flush, pressure check and rodding. Even with no thermostat installed, I still get up to 190 degrees at highway speed on a hot afternoon. I've obviously been avoiding traffic. A slant six has never run this warm for me. What else should I be looking at? Thanks, Rick Marsh