travlnman Posted September 2, 2009 Share Posted September 2, 2009 Got a stock '78. The lid for the coolant overflow keeps popping off, and I can't keep coolant in it. Put on a new cap, which was leaking for sure. No obvious external leaks, no running hot. No steam from tailpipe, and no milkshake in the oil sump. Could it be just sipping a little at a time ? Not enough to make steam, but use up coolant. Also, what is the recommended cap pressure for the stock system ? I think the new one I put on is 13 lbs, seems high to me. Thanks for your help. Quote Link to comment Share on other sites More sharing options...
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