Do you have to pull the engine replace freeze plugs?

No, you generally do not have to pull the engine to replace freeze plugs (also called core plugs). While the accessibility varies depending on the vehicle and the location of the freeze plug, many can be replaced with the engine in the vehicle. However, some situations might make engine removal easier:

* Extremely difficult access: Some freeze plugs are located in awkward spots that make access challenging even with specialized tools. In these cases, engine removal might be the more efficient approach.

* Severe corrosion or damage: If a freeze plug is severely rusted or damaged, it might be easier to remove and replace it with the engine out, as you'll have better access for cleaning up any remaining debris.

* Multiple freeze plugs: If you need to replace multiple freeze plugs, engine removal might save time and effort overall.

In short, it's *often* possible to replace freeze plugs without removing the engine, but it's not *always* the easiest or most practical option. The specific vehicle and the location of the freeze plug(s) will determine the best course of action.