1974 Pontiac Grand Am Coolant Loss

PONTIAC GRAND AM
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RANDYB60
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  • 1 POST
I have a 1974 Pontiac Grand Am with a 400 cu in engine, TH400 tranny. unknown actual miles. It had been running a little hot (but never overheated), so I replaced the radiator and the water pump. Now after driving about 100 miles the radiator will be down about one gallon of coolant. There are no leaks. I can smell the coolant when I shut off the car. Head Gaskets?
Feb 28, 2007 at 10:34 AM
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CHEVY22
  • ✓Experienced Mechanic
  • 1,375 POSTS
you might rty and have a coolant pressure test if you dont see it on the ground, its cheap 25 bucks , but it does sound like ahead gasket

thanks , jim

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Feb 28, 2007 at 11:35 AM

Suggested Repair

Have a coolant pressure test performed to check for internal coolant loss. The symptoms suggest a possible head gasket problem.

Conversation Summary

The owner of a 1974 Pontiac Grand Am with a 400 engine reports losing about a gallon of coolant after roughly 100 miles, with no visible leaks but a coolant smell after shutdown. The radiator and water pump were already replaced. The expert recommends an inexpensive coolant pressure test and says the symptoms sound like a head gasket issue.

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