HOWO Core Plug 90003989721

90003989721

Brass core plug (expansion plug) type A for Sinotruk WD615.96 engine block, part number 90003989721. Genuine and OEM quality available. Bulk orders welcome.

✓ OEM number matched confirm the part number before ordering ✓ Photographed the photos are the actual part we ship ✓ MOQ 1 piece · neutral packing ✓ Shipping worldwide from Jinan, 7–15 days

Request a Quote Bulk pricing available →

Core Plug (part number 90003989721), the core plug (freeze plug) that seals the sand-cast openings in the engine block, for Sinotruk WD615 series engines – HOWO 371, HOWO A7, STEYR and related trucks.

Specifications

Part Number	90003989721
Product	Core Plug
Product	Core plug / freeze plug
Position	Engine block
Fits	Sinotruk WD615 series engines – HOWO 371, HOWO A7, STEYR and related trucks
Condition	New

Key Features

Stamped steel to original cup profile
Clean flange for a leak-free press fit
Corrosion-protected surface

Signs of Wear

Weeping or bulged plugs leak coolant slowly then suddenly. Replace with the correct size, clean the bore, and seat square – never seal with epoxy. If one plug rusted through, the others are the same age: budget for the set.

Related parts we also supply

HOWO Main Bearing Set VG1500010046 – from the same system
Truck Ribbed Belt 8PK1160 – from the same system
HOWO Connecting Rod Bearing Set VG1540030015/0016 – from the same system

Ordering

Genuine and OEM quality available. Bulk orders welcome. Send us the part number or a photo of your old part and we will confirm fitment and quote within 24 hours.

Frequently Asked Questions

What does part 90003989721 fit?

Brass core plug (expansion plug) type A for Sinotruk WD615.96 engine block, part number 90003989721. Genuine and OEM quality available. Bulk orders welcome. It is supplied for Sinotruk HOWO heavy trucks. Send your VIN or a photo of the nameplate on the old part and we will confirm fitment before you order.

Is 90003989721 genuine, OEM or aftermarket?

Genuine, OEM and high-quality aftermarket options are available depending on stock. Tell us which grade and budget you need and we will quote both so you can compare.

What is the minimum order and lead time for 90003989721?

Minimum order is 1 piece for most items. Stock items are dispatched within 2-3 working days; if the part has to be sourced we confirm the exact lead time in the quotation, usually 5-10 working days.

How do you ship 90003989721?

Air express (DHL / FedEx / UPS) for urgent orders, and sea or rail freight for bulk orders. We send photos of the actual part and the packing before shipment, then share the tracking number.