MAHL Engine Parts 4BT 6BT Valve Stem Guide Valve Guide 3904409 Diesel Engine Parts

Keywords: 3904409 valve stem guide, 4BT 6BT valve guide, diesel engine valve guide, excavator engine spare parts, heavy‑duty engine valve stem guide, aftermarket replacement valve guide

Product Overview

Valve Stem Guide Part No.3904409 is an important valve system component for 4BT 6BT diesel engine widely fitted on excavators and heavy‑duty construction machinery. It provides precise guiding for intake and exhaust valve stem, keeps valve moving in correct vertical track, and bears friction generated during valve reciprocating movement. This replacement valve guide solves common failures including excessive valve clearance, valve stem oil leakage, blue exhaust smoke and valve‑stem wear caused by original guide inner‑hole abrasion. Each valve stem guide undergoes strict dimension tolerance inspection and hardness test before shipment.

Detailed Specifications

Key Features & Advantages

• High‑quality alloy material with stable hardness, excellent wear‑resistance, anti‑friction performance for long‑term high‑temperature working environment.
• Precise inner and outer hole machining tolerance, guarantee good fit clearance with valve stem and cylinder head mounting hole.
• Effectively restrain valve swing, reduce abnormal wear of valve seat, prevent engine burning oil and blue smoke exhaust fault.
• Direct replacement for worn original valve guide, restore normal valve operating performance for engine overhaul.
• Stable dimensional consistency, convenient press‑in installation for cylinder head repair work.

Application Scope

Fit Equipment: Excavators and heavy‑duty machinery equipped with 4BT 6BT diesel engine ‑ Widely applied for engine repair workshops and routine equipment maintenance projects.

Our Company Advantage

We are professional supplier of full‑range construction machinery spare parts, supplying engine parts, hydraulic parts, electrical parts, seal kits and complete overhaul kits. ‑ Large ready stock for various machinery spare parts ‑ Factory‑direct wholesale competitive price ‑ Mixed‑order & one‑stop spare‑parts procurement supported ‑ Professional part‑number matching technical support service

Packaging & Shipping

Neutral export plastic bag with shock‑proof inner packing, avoid scratch during long‑distance transportation ‑ Multiple shipping options: sea freight, air freight, international express for small trial orders ‑ Export documents such as Commercial Invoice, Packing List can be provided.

Contact Us

If you need more excavator spare parts or other construction machinery replacement components, please send your parts list to us. We will offer our best quotation for you quickly.