Volvo VNL Coolant Surge Tank | PN 23915461

You have 30 calendar days to return an item from the date you received it. To be eligible for return all parts must meet the following conditions:
• The item must be new, unused, and uninstalled;
• The product must be in salable condition, with no signs of installation (e.g., grease, scratches, or missing components);
• Original packaging is required, especially for branded parts;
• Any item that has been installed, modified, or misused is not eligible for return;
• Unacceptable returns may be shipped back to the customer upon request, at the customer's expense;
• Your item needs to have the receipt or proof of purchase.
We have a Restocking Fee which applies for return items with damaged package. Restocking Fee is 25%-50% of initial purchase.
• Do not tape the original packaging box — Restocking Fee will apply;
• Do not stick any shipping label/sticker on the original packaging box — Restocking Fee will apply;
• We recommend using stretch film to wrap the original packaging box. Use an additional shipping box or envelope to return the item.
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The Volvo VNL Coolant Surge Tank (23915461) serves as the coolant system's expansion reservoir and deaeration vessel, maintaining proper system pressure and removing air bubbles from the cooling circuit. A cracked or damaged surge tank causes coolant loss, air ingestion into the cooling system, and localized overheating from air pockets. This is a common failure on high-mileage Volvo VNL trucks — cracks often appear at the mounting tabs and filler neck due to heat cycling and vibration.

Q: Which trucks does this coolant surge tank fit?
A: Fits Volvo VNL trucks. Genuine Volvo OEM part number 23915461.

Q: What are the symptoms of a failing coolant surge tank?
A: Visible cracks in the plastic tank, coolant loss without visible external leaks, overheating, white residue around the tank, and air bubbles in the cooling system.

Q: Is this a genuine Volvo part?
A: Yes. This is a genuine Volvo OEM coolant surge tank — using genuine plastic formulation resistant to coolant chemicals and heat cycling.

Q: What is included with this surge tank?
A: Includes the complete coolant surge tank assembly 23915461. Inspect and replace the pressure cap at the same time.

Q: Should the coolant cap be replaced along with the tank?
A: Yes. Always replace the coolant pressure cap when replacing the surge tank — a worn cap causes incorrect system pressure and continued coolant loss.