1971 Lemans coolant boiling

Asked by Nov 04, 2016 at 07:13 PM about the 1971 Pontiac Le Mans

Question type: Maintenance & Repair

1971 Pontiac Lemans. Original 350, fresh build,
coolant in radiator is boiling.

3 Answers

227,875

Check the thermostat, might be stuck closed.

1 out of 1 people think this is helpful.
51,415

Make sure you have 50/50 coolant and water. Plain water boils at a much lower temperature. If this and Tom's advice does not work then check compression to make sure you don't have a leaking head gasket.

1 out of 1 people think this is helpful.
62,815

Also check your ignition timing. If it's retarded (late) it will cause the engine to run hot and possibly boil over when shut off. HTH. - Jim

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