

⚙️ Build brilliance, power up passion — own the engine of innovation!
The Mould King Technic Visible L4 Engine Building Kit is a 1787-piece STEM model replicating a real inline 4-cylinder diesel engine with motorized pistons and a transparent casing. Designed for ages 14+, it offers an authentic hands-on experience with mechanical details like intake/exhaust paths and timing systems, making it an ideal educational and display piece for aspiring engineers and enthusiasts.







| ASIN | B0CYBXMV1L |
| Assembly Required | Yes |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #38,639 in Toys ( See Top 100 in Toys ) #2,005 in Toy Building Sets |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (15) |
| Date First Available | 3 May 2024 |
| Educational Objective(s) | To support learning in engineering and mechanics, particularly for kids aged 14 and above. |
| Item model number | 10087 |
| Manufacturer recommended age | 14 years and up |
| Material Type(s) | Plastic |
| Number of Puzzle Pieces | 787 |
| Product Dimensions | 29.46 x 8.84 x 41.4 cm; 2.08 kg |
R**S
Equal parts challenging and fun those who grew up with repairable autos. I owned dhoc 2.8 L and 3.2 l. straight six jaguars for much of my life. This straight four was the closest thing that was also at my price point. It took a week to build which is what I wanted. Tbe build was tricky for geezer fingers, but never more than that. As with most Mould King kits, parts fit well and were close to LEGO quality. Two commonly available pieces were missing, replaced by extra parts from other kits. There were also 18 extra parts in this kit (for future use).
R**N
Seller is highly recommended
J**K
This was a challenge but I enjoyed every minute of it. There were zero missing pieces. I am looking forward to the next challenge.
R**L
I purchased this for my sons 13th birthday. He was so excited when he opened it. He loves Legos and anything to do with motors so this was right in the middle. Fun for hours! I will mention the description says it's a diesel motor and it's a gasoline motor.
B**T
I bought this for my teenage son who loves to work on cars. He loved building it.
Trustpilot
2 weeks ago
1 week ago