Yea, heat, the car get hot inside in the summer with a full belly pan. Put some vents around the gas tank to help keep it cool, or the gas might boil and build up pressure. I wrapped the exhaust pipe and muffler with fiberglass cloth and foil. Also, need to add vents to let the radiator air flow out underneath the car (truck). i run thinner synthetic oil, 5w less than oem spec.
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- Tony
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