Genuine 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.
You will be responsible for paying your own shipping costs for returning your item. Shipping costs are nonrefundable.

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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.