ZTech Water Pump Volvo D13 / Mack MP8 | 85000957 20920065

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.

Free Standard Shipping — $0 on orders $149.99+ (3-5 business days)
Express Shipping available at checkout (1-2 business days)
Guaranteed Overnight Shipping available at checkout — order before 2 PM PST (Monday–Friday)
International shipping available to Canada and EU — rates calculated at checkout.
All orders processed within 1 business day (excluding Sunday and holidays).

The ZTech Water Pump (85000957 / 20920065) for Volvo D13 and Mack MP8 engines features an electromagnetic clutch for demand-based coolant circulation control. This advanced design allows the pump to modulate coolant flow based on engine load and temperature, improving fuel efficiency by up to 3% and reducing warm-up time compared to conventional pumps. ZTech water pumps are manufactured to European OEM standards. Symptoms of failure include coolant leaks, overheating, and engine temperature fluctuations.

Q: Which engines does this water pump fit?
A: Fits Volvo D13 and Mack MP8 diesel engines. Replaces OEM part numbers 85000957 and 20920065.

Q: What is the electromagnetic clutch feature?
A: The electromagnetic clutch allows the pump to engage and disengage based on cooling demand, reducing parasitic load on the engine and improving fuel efficiency.

Q: What symptoms indicate a failing electromagnetic water pump?
A: Engine temperature fluctuations, overheating under load, coolant leaks at the pump shaft seal, and electromagnetic clutch fault codes.

Q: Is this OEM or aftermarket?
A: ZTech European aftermarket, manufactured to OEM specifications for Volvo D13 and Mack MP8 applications.

Q: Does this pump require any special installation steps?
A: The electromagnetic clutch connector must be properly connected after installation — verify the electrical connection is secure before starting the engine.