2018 Ford F-150: 3.5L EcoBoost coolant intrusion

2018 Ford F-150 · 13th (2015–2020 aluminum body) · 3.5L EcoBoost V6

How you’d notice

Coolant disappearing with no puddle
white smoke
misfire on a cold start
milky oil. 2015–2017 3.5 EcoBoost is the worst of this generation. A compression or leak-down test on a cold engine is the shop check.

Typical shop cost

Repair	USD
Independent shop, parts and labour, before tax	$4,500–$9,000 USD

As of 2026. Ballpark, not a quote for the vehicle in the ad. USD figures are independent-shop ranges when we’ve entered them — we don’t invent a number.

Common window: 49,680–124,200 miles.

A lift, not a driveway glance. You pay the shop. First appointment of the morning so the engine is cold.

Walk away if

Coolant loss, milky oil, or a shop that will not leak-down a cold 3.5 EcoBoost

The bigger picture on this listing

This page is the year and model. The report is the vehicle in the ad. We do not publish, for this listing:

whether these photos don’t show this job
whether the asking price already assumes it
tax on this price
a named shop in this city — we only print phones we’ve checked

That’s the one-listing document. Homework, not an inspection.

Paste the listing — $29.99

The same problem on other cars

No other models in the knowledge base share this job yet. When they do, they land here.