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The Smithsonian Motor Works Model Engine

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ITEM# 12323734
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    ITEM#: 12323734

    This Smithsonian activity set lets you build a real working battery powered, four-cylinder model engine. The learning accessory features real lights and sounds as it lets you see how the pistons fire with the correct timing.

    • Watch the belts and fan turn
    • Includes, over 100 parts that screw together easily, and detailed instructions
    • Requires two (2) AA batteries (not included)
    • Recommended for ages 8 years and up
    • Includes 35-inch long x 23-inch wide poster
    • Build a working model of a 4-cylinder engine
    • Valves rock, spark plugs fire and pistons drive crankshaft
    • Battery operated moving parts and lights

    Set includes
    • 2 washers
    • 2 shafts in various lengths
    • 4 exhaust valves
    • 4 intake valves
    • 8 valve stems
    • 4 piston halves
    • 4 connecting rods
    • 8 timing cams
    • 8 rocker arms
    • Crankshaft
    • Crankshaft pullery
    • Fan pullery and fan
    • Engine mounting stand
    • 5 bearings and clutch housing
    • Oil-pan
    • Lower crankcase
    • Rocker arm cover
    • Upper cylinder head
    • Timing belt
    • Timing wheel
    • Timing gear
    • Belt tensioning pullery
    • Lower cylinder head
    • Cylinder block
    • Dipstick
    • Positioning jig
    • Timing belt cover
    • Intake manifold
    • Exhaust manifold
    • Carburetor cover
    • Carburetor bowl
    • Front half of water pump
    • Rear half of water pump
    • Flywheel clutch
    • Fan belt
    • Head basket
    • 8 valve springs
    • Distributor assembly
    • Drive module
    • Battery pack
    • 67 screws


    Theme Children, Masculine, School, Scouts, Vehicles
    Dimensions 15.0x11.0x2.0
    Model Number 49013
    Country of Origin China

    Customer Reviews

    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    • Most Recent

    • For the Young Scientist

      Some creativity but mostly pre-assembled

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    • Engine

      Bought this for my step son and he loves it. Recommend all the Smithsonian learning toys.

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    • Did not work

      My son worked so hard on it and did an amazing job. When he got done and we put batteries in it, nothing happened. Very disappointed.

      Read More
    • Marie G

      My nephew loved it!!! This was a good gift, and somewhat challenging which was good:)

      Read More
    • my husband loved this for christmas

      great gift for all ages or yourself

      Read More
    • Most Helpful

    • Model Engine

      The engine is fun to assemble when you have all the parts needed. My recommendation is verify that all parts are included before starting the project. Maybe not such a good idea to get this toy from Overstock? Then send one email to NSI. So, far NSI International has sent us the first part and we have requested the second at the time of writing this review. My ten year old is able to assemble the engine with just a little help. There are a couple of mistakes in the instructions. On step 18, follow the sequence A,B,C,D,E,F,G and H for the camshaft but don't try to match the orientation of the parts to the drawing. Instead, A & B, C & D, E & F and G & H will point in opposite directions. Also, on step #19, ignore the drawing showing that the camshaft parts have changed sequence in that step. This was confusing to my son.

      Read More
    • not happy with this item. screw hole don't align

      not at all happy with this product. the crew alignment was off and the whole toy had gaps and didn't fit nicely together. never got it to work properly... most likely because of the alignment

      Read More
    • fun plastic model tombuild

      detailed,realistic. Can see operating parts inside a 4 cylinder overhead cam engine.

      Read More
    • Super cool for preteens

      I ordered this for my 11 year old grandson. He was so excited perfect gift!

      Read More
    • parts missing, poor quality brittle plastic-cheap

      Camshaft pieces were missing. I had all 8, but instead of all being different I had a mismatch of 4 of the same, 2 of the same ect. Many pieces already had cracks out of the box and while installing screws usually cracked and not from over tightening, like half way in they would crack. Pieces were badly molded and featured a lot of parts needing deburring before they could be assembled, Instruction illustrations were very poor and incomplete leading to confusion on many steps and having to look at all the other steps to see proper orientation. Several times these were even inconsistent. My daughter got frustrated with this and rightfully so. I'm a mechanic and I think it's garbage. Buy the visable V8 for another $10 it is a lot better made. Still waiting to hear about the missing cam pieces, probably be thrown away....beware.

      Read More

    Questions & Answers

    • Why did you choose this product?

      • It will be perfect for my 13 year old grandson.

      • Christmas gift

      • Daughter is interested in science and mechanical items.

      • My six year old boy loves building things

      • for my son

      • My grandson is very inquisitive and analytical. Although the internal combustion engine may be obsolete within his lifetime, I feel that every young man should know the principles and physics of how it works.

      Read more Read less

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    Shipping & Returns


    Usually leaves our warehouse in 1-2 business days. *

    Standard Return Policy:

    Items must be returned in new or unused condition and contain all original materials included with the shipment. More Details

    FINAL SALE EXCLUSION: Items marked as FINAL SALE are not returnable unless the problem you experience is the result of our error.

    Shipping Information:

    Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final shipping cost and estimated delivery timeframe will be available at checkout.
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    For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

    ** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.


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