How do I open the files from this assembly?

see link: https://grabcad.com/library/four-cylinder-engine-1/details?folder_id=383185

The files are not in .step version or .prt, how can I convert these to .prt or .step?

4 Answers

How? Just buy Pro/Engineer and open the Modell (just kidding)

I used a conversion tool to create a STEP File (and used 7-zip to compress the file), but its an old version of this tool, so there is no warranty

Something must've gone wrong with the conversion.
It looks like, there should have been more than 4 parts in the assembly.
You just right click on the part you want to open in the assembly tree.
Keep in mind this is with respect to Creo 2.0.

Improved Version (Import and export done with Inventor 2018)

thank you very much guys, it works now!