Poly-V belt Dayco 5040490

DAYCO 5040490 belongs to poly-V belt, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 5040490 and any equivalents.

A serpentine belt that runs off alignment or over worn sheaves will not last, no matter how good the belt is. The Dayco 5040490 is a 4-rib automotive multi-rib belt with a 1245.11 mm effective length and 13.72 mm width. Before you fit it, inspect the drive and the sheaves it runs on.

Check each sheave for wear, nicks, rust or a polished groove profile. A rib that sits too deep or rides on the wrong surface will slip or shred. Spin the pulleys by hand and feel for bearing play, rough rotation or a wobble that would throw the belt off line. Confirm the tensioner and any idler turn freely and that the tensioner moves through its full travel.

Match the belt to the drive by rib count, profile and length. This Dayco belt has 4 ribs and a 1245.11 mm effective length, and it is also listed as 4PK1245. Route it by the underhood label or the original routing, then check that every rib sits fully in its groove before you release the tensioner. If the old belt is still on the engine, read the marking on its back and compare it with the new belt.

For a quote, send the part number 5040490 or 4PK1245, the rib count and the length you measured. If you are not certain of the number, send a photo of the marking on the old belt and the engine or equipment details. We carry Dayco and can help confirm the right belt or suggest an equivalent.