Have you checked the ignition timing? Also, is the coolant boiling causing it to bubble in the radiator, or is it foamy? Also, have you checked for oil in the coolant or coolant in the oil? If not, are there any visible coolant leaks around the heads?
And Finally, (and the cheapest repair) Keep an eye on the radiator hoses, especially the lower one. Make sure it isn't collapsing when the car is hot and restricting the coolant flow.
Let me know what you find.
Saturday, October 18th, 2008 AT 5:59 PM