When a Yuchai engine needs bottom-end work, the block is the foundation everything else bolts to, and ordering the wrong casting is an expensive mistake. The yuchai cylinder block e0400-1002015b is a cataloged Yuchai engine block used in specific engine applications, and confirming its fitment before purchase saves you freight, machining, and downtime. This guide explains what the E0400-1002015B block is, how to confirm it matches your engine, and which supporting parts you should order alongside it so the rebuild goes together once.
What Is the E0400-1002015B Cylinder Block?
The E0400-1002015B is a Yuchai engine block assembly identified by its factory part number. Blocks are matched to a specific engine series, bore, and machining layout, so the part number rather than a photo is how you confirm the casting is correct. Because a block carries the main bearing bores, cylinder bores, and oil galleries, even a small revision can change fitment. Always cross-check the number on your old block or engine data plate against the supplier’s catalog before ordering, and keep the old block until the new one is measured and approved.
How to Confirm Fitment Before You Order
- Read the casting number: the stamped or cast number on the old block is the most reliable reference.
- Record the engine model: note the full Yuchai series and any machine-manufacturer suffix.
- Check the bore and liner type: confirm whether the engine uses wet or dry liners.
- Compare supporting parts: liners, gaskets, and pistons must match the block’s machining.
If your application uses a different casting, a supplier can often match the correct block. The 1DQ000-9000300 cylinder block is another cataloged Yuchai block option that covers different applications, so having your engine details ready helps the exporter route you to the right casting the first time.
Common Causes of Block Failure
Most blocks do not fail on their own; they are taken out by something else. Overheating can crack a bore or warp the deck, a dropped valve can punch through a piston crown, and a failed liner seal can scour the bore. When you replace the block, fix the root cause too, or the new casting will meet the same fate. This is why a block order is rarely a block alone; it usually travels with the liners, pistons, and gaskets that complete the repair. Ask your supplier to confirm the machined bore grade of the block before dispatch so the pistons are sized to match.
Supporting Parts to Order With a New Block
A bare block rarely goes back into service alone. If the block failed from overheating or a dropped liner, the bores, liners, and gaskets are usually due for replacement at the same time. Pair the block with a matched cylinder liner such as the YC6G270-30 G0100-1002026BV3B and a fresh gasket kit so the sealing surfaces are correct from the first assembly. Suppliers such as EPID also stock overhaul kits across the Yuchai range, for example the YC4D130 overhaul kit with gasket set, so order the kit that matches your specific engine series.
Inspection Before Assembly
Before the new block goes into the engine, have the machine shop verify the main bearing bores and cylinder bores are straight and within tolerance. Check the oil galleries for debris left from manufacturing or the previous failure, and replace the core plugs if the block was stored or shipped long distance. Also confirm the block’s deck is flat before the head goes on, because a warped deck leaks coolant even with a new gasket. A clean, measured block is the difference between a rebuild that lasts and one that comes apart early, so do not skip this step even when the casting is new. Prime the oil system and check gallery pressure before the first start, because a dry start on fresh bearings undoes careful assembly in seconds.
Frequently Asked Questions
Is the E0400-1002015B block a direct replacement?
It replaces engines whose factory part number matches. Compare the number on your data plate or old casting first, and confirm the liner and gasket type with your supplier, so the casting, liners, and seals all belong to the same build.
What should I order with a cylinder block?
Order liners, a gasket kit, and the wear parts that match your bore. A matched cylinder liner and fresh gasket set renew the sealing surfaces in one job.
For verified Yuchai cylinder blocks and the parts that complete a rebuild, EPID Diesel Engine Parts matches every casting to your engine before it ships. Browse our Yuchai diesel engine parts range and rebuild with confidence.
