Inspired by the Toyota 4 cylinder engine found here http://www.thingiverse.com/thing:644933I thought it'd be cool to have more different kinds of engine models available for download.

This model is based on 8-valve cylinder head found from Volvo's 2.0 - 2.3l "Redblock" engines (B200-B230). It uses singular overhead camshaft operating the valves without rockers. Volvo has made these with various configurations, different camshafts etc as it's standard head found in both turbocharged and non-turbo redblocks. These heads don't have bearings for camshaft either, it's simply locked in place with the collars and constantly lubricated with oil channels running around the cam mounts. Super simple.

This isn't meant to be an exact replica: some measurements are off, intake/exhaust channels are very basic (straight to the valves) and coolant channels are completely missing.

However all the mechanical stuff works and it provides good view of OHC head operation. This isn't an easy build, and requires lots of patience in assembly. Some tolerances are quite tight and sanding/drilling might be necessary to fit components together smoothly. Also the head printing time is quite long (>12h) so make sure your printer is properly calibrated and able to accomplish such a long print!

List of parts needed to print:

• Head x 1
• Rocker cover x 1
• Oil cap x 1
• Spark plugs x 4
• 1st shaft collar x 1
• 2-4 shaft collar x 3
• 5th shaft collar x 1
• Camshaft x 1
• Valve intake x 4
• Valve exhaust x 4
• Cam sprocket x 1
• Valve cap x 8
• Valve spring retainer x 8
• Retainer holder x 8