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Summary Update: 1/4/18 After checking the scale it is closer to 1/10 scale. Maybe a little larger. Also added throttle body linkage and a cap for the oil bell mount in the head. Adds a little more detail to an already awesome model. UPDATE: 12-2-17 added missing water pump gears. Also added parts list and assembly diagrams. Assembly diagrams are for assembly reference only. it is the original design PDF files and show the larger screws. refer to the parts list for the screw sizes. Also compatible with my 1/10 scale rolling engine stand. https://www.thingiverse.com/thing:2657483 This is a 1/10 scale remix of ericthepoolboy's famous 22RE Toyota engine. Everything was scaled down to be fully functional like the larger 1/3 scale engine. Majority of the parts had to be edited in the CAD program to accommodate the smaller hardware. I also scaled down and redesigned my Side Draft Carb Kit to look neater with the smaller scale. You tube video of it in operation can be found here https://youtu.be/IWnkiVm_SU4 In my opinion this kit was harder to build than the larger motor. You must have lots of patience and a decently tuned printer to build this model. The best thing to do is SLOW YOUR PRINTER SPEED DOWN. Refer to the original motor diagrams created by Ericthepoolboy for assembly directions. https://www.thingiverse.com/thing:644933 Almost every part will need to be honed, sanded, or filed due to the variance in printer settings, tight tolerance's, and your availability of hardware. Pistons and cylinders need to be sanded so there is little to no resistance when the piston moves up and down. I used some hi temp gun grease to lube the cylinder walls. Rockers and cam brace need to filed, drilled, and or sanded so the rockers rotate freely. The valve springs were made out of .020 safety wire wrapped around a 13/16 drill bit. The spring keeper pushes over the push rods and held with a little dab of CA glue. The screws I used were 1.6mm, and 2mm screws. Most of my screws were sourced from www.RC4WD.com http://store.rc4wd.com/M16_c_311.html or you can order the 1/24 crawler screw kit from https://www.ebay.com/itm/Losi-LOSB1724-Complete-Hardware-Screw-Set-1-24-Micro-Rock-Crawler-Trail-Trekker/292335863298?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 The bearings I used were 11x4x4 for the crank (SMR694-ZZ) 2x5x2.5 (MR52-ZZ) for the pistons, cam shaft, and water pump gears. I sourced those bearings from ebay and or Banggood. A simple search of the part number will bring them up. A 1.8mm rod was used for the cam shaft and some CA glue was used to lock it down. 1mm flight control rod was used for the rods in the cam brace assembly. Large Paper clips will work fine. Large paper clips were cut to 20mm and used for the intake and exhaust valve push rods. I used 2x1mm neodymium magnets. I sourced the magnets from banggood or ebay. https://www.banggood.com/100pcs-N50-2mm-x-1mm-Round-Magnets-Rare-Earth-Neodymium-NdFeB-p-942082.html?rmmds=myorder&cur_warehouse=CN The electric 6v, 200rpm geared motor was sourced from https://www.banggood.com/DC-6V-200RPM-Mini-Metal-Gear-Motor-With-Gearwheel-p-969275.html The motor controller was sourced from https://www.banggood.com/90W-DC-3V-35V-Motor-PWM-Speed-Controller-Switch-LED-Fan-Dimmer-p-1056903.html. Make sure to use a 7.4v battery. If you use the 6v motor listed above, DO NOT USE a 12v battery. Print Settings Printer Brand: Wanhao Printer: Wanhao Duplicator i3 V2 Rafts: No Resolution: .2