描述
4-bd1 thermostat
This 4bd1 thermostat is a direct replacement part. It is built to OEM dimensional specification, so it installs in the original position without any modification to the surrounding assembly.
Part number / cross reference
OEM and interchange reference: 8-94472331-1 | 8-94470-0301-1 | HM-H00011
Use the number from your parts book to confirm interchangeability. If your number is not listed, send it to us — we cross-check against the parts manual and confirm in writing before you pay, because a wrong part costs far more in freight and downtime than the part itself.
Compatible machines
4BD1, 4BE1
Fitment can change on a serial-number break within the same model. Send us the model and serial number from the machine nameplate and we verify it against the parts manual before dispatch.
Why this part fails — and what we do differently
Cooling problems are expensive because the damage happens before the gauge moves. This 4bd1 thermostat is built with the correct core depth, fin pitch and tube layout for the heat load of the machine, then pressure-tested for leaks. An undersized core is the most common reason an engine still overheats after a ‘new’ cooler is fitted.
Ordering, packing and warranty
Single pieces ship for urgent breakdowns; consolidated container or air freight is available for stock orders. Each part is packed individually in a carton with the part number labelled, and we send photographs of the actual goods plus a measurement report before shipment. Warranty: 6–12 months against manufacturing defect under normal operating conditions.
