Dave,
Rebuilt engines are tight and therefore tend to run hot, especially with your foot on the brake at a stop light. I also expanded my radiator from 2 row. With the old 383, no hot engine. With the newly rebuilt 413 (0.040 over), I am running hot too. I have only driven it about 5000 miles in the last 4 years since it was rebuilt. I do not remember my new thermostat temperature, but it should open way before the temp gauge gets into the upper limit.
Regards,
Mark Lindahl
’63 300 Conv.
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Dave Dumais dave.dumais@xxxxxxxxx [Chrysler300]
Sent: Monday, June 29, 2015 8:05 PM
To: Chrysler 300 List
Subject: [Chrysler300] thermostats
question came up. I am running a 160 thermo with new 4 core set up.
Is there a difference running a 180, will the 180 close and reopen?
And does the 4 core 64 have a 13 # cap?
What about the head gasket, as mentioned by another member?
Will check fluid level after cool down.