1976 Triumph runs rough when HOT. Starts fine and drives OK when cold.
Feb 5, 2011 at 6:09 PM
MHPAUTOS
✓Experienced Mechanic
31,937 POSTS
Check that the thermostat is working correctly, and get the radiator cleaned as you may have a few blocked core tubes, this is a common problem especially if good quality coolant is not used.