2017 Nissan Altima — coolant is old by age but mileage is low

I wouldn't throw parts yet. If a shop can't duplicate it on the 2017 Nissan Altima, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. I'd want that in writing, not as a promise. Wrote this up on my lunch break.

It did coolant is old by age but mileage twice this week, both times after sitting. No change in mileage feel. No warning lights, which is why I'm documenting it.

This is usually cheaper to test than to guess. Write temp, speed, and in-gear vs coast when the 2017 Nissan Altima does it — then decide on parts. That's the branch I'd chase this week. I'd want that in writing, not as a promise. Make the next action something you can finish this week. Next check is the cheap one I can do in a driveway.

Intermittent stuff lies if you only catch it once. A pressure test beats staring at a dry driveway if the 2017 Nissan Altima is losing coolant with no puddle. If the cheap test changes it, stop and reassess. On “coolant is old by age but mileage,” that was the fork that mattered for me. A shop burned me once by skipping that step. If your situation is the opposite, ignore me. I keep a notes app thread for this now.

Log the conditions before you spend. Move a coil or plug on the 2017 Nissan Altima if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. On “coolant is old by age but mileage,” that was the fork that mattered for me. That's the whole play. Parking it somewhere I can hear it better next time.

I wouldn't throw parts yet. Loaded-suspension checks on the 2017 Nissan Altima catch play that a wheels-hanging inspection misses. If the cheap test changes it, stop and reassess. If they can't show the line item, I assume it's hiding. Worth doing even if the car feels fine right now. Video is ugly but it shows the hesitation.

I'd want a measurement, not a hunch. Write temp, speed, and in-gear vs coast when the 2017 Nissan Altima does it — then decide on parts. Save the big job until that test fails. A shop burned me once by skipping that step. Doing the boring step first on purpose.

This is usually cheaper to test than to guess. A pressure test beats staring at a dry driveway if the 2017 Nissan Altima is losing coolant with no puddle. That's the branch I'd chase this week. This is from a 2017 Nissan Altima in Orlando. Stop there until you know. A day of patience here is cheaper than a wrong part. This is me being the wet blanket on purpose.