i have a 98 gt that had 01 heads on it the cams eventually went bad and i found a low milage 05 police interceptor and took the valve covers off to check the cams and they were new. and the rest of the motor looks new and in the valve cover it has a tag that says rep engine and a code (5s-112-aa) is this a crate

 

You would have to get some casting numbers off the block. Tags in the valve covers are just identifiers for the part. I doubt that if it was a true police crown vic that it would have been replaced with a crate moter, as police departments tend to have rather good mait, and use oem stuff.

Only way to know for sure what the engine is , is to look on the back of the engine someplace for the casiting number.

 

U were looking for yer cams under the valve cover? U may do a title search or car fax of previous owners as well n you may find out more information that way as well!

 

NO he was checking the cams,,,, 4.6l = over head cams


Over head cams = under the valve covers.

 

Could be a reman engine from ford.

 

Ah ha ok got it lol!!!

 

This thread was helpful

 

It was as helpful as it could be , considering the ops question.

How do you identify an engine from a few number under the valve cover?

Do you have some helpful insight, or a problem of you own in identifying an engine.

Bottom line is , as I stated in my earlier post, You NEED casting numbers on the block it self.