Maintenance & Service IntervalsQuestionCommunity Starter

1970 Datsun 240Z — coolant is old by age but mileage is low

LongMilesMechanicish836Community StarterDec 27, 20251970 Datsun 240ZBaltimore

1970 Datsun 240Z, about 211,500 miles. The vehicle has relatively few miles but the coolant is several years old. I am trying to prioritize maintenance by actual risk. Would you replace based on time alone?

1 replies

CanyonSeller690Community StarterCommunity StarterDec 27, 2025permalink

I'd want a measurement, not a hunch. Get a real battery/charging test on the 1970 Datsun 240Z, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. Do that first. I'd rather be boring and correct. Happens in gear, not in park, for what that's worth.

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