191-6766 [GUIDE INT]

The 191-6766 [Guide Intake] is a guide component used in large Caterpillar gas engines, especially in the cylinder head.

🔧 What it is

• Part number: 191-6766
• Name: Intake Valve Guide
• Brand: Caterpillar
• Type: Engine valve train component

👉 It guides the intake valve stem so the valve moves smoothly and stays aligned inside the cylinder head.

⚙️ Key specifications

• Material: Gray cast iron
• Length: ~132 mm (≈5.2 in)
• Diameter: ~30.38 mm
• Weight: ~0.11–0.12 kg

🏭 Applications

Used in heavy-duty CAT gas engines such as:

• G3508, G3512, G3516
• G3520 series
• Generator sets (SR4 / SR4B)