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SKU: 5166KT
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- Description
- Fitment
- Warranty and Refund
- Reviews
The Motorad 5166KT is a complete engine coolant thermostat housing assembly built to OEM specifications, combining a copper and stainless steel housing, thermostat, and O-ring seal in one package. Its disk-type mechanical valve begins opening at 195°F (90.56°C), helping your cooling system respond consistently as engine temperature rises. The offset design and air relief valve support proper coolant flow and help reduce trapped air pockets during installation. With two mounting holes and a gasket already included, this assembly is designed to install in place of your original unit without sourcing separate parts. Manufactured by an OE supplier using OEM-grade materials, the 5166KT fits a wide range of Buick, Chevrolet, Oldsmobile, and Pontiac models from 1991-2004, including Century, Regal, Impala, Malibu, Monte Carlo, and Venture. Whether you're replacing a cracked housing or addressing erratic temperature readings, this all-in-one kit simplifies the repair.
Features
- Includes housing, thermostat, and O-ring seal for a single-part repair without extra shopping
- Copper and stainless steel construction built to OEM material specifications for dependable service
- 195°F start-to-open temperature helps maintain consistent engine operating temperature
- Offset design with air relief valve supports proper coolant flow during installation
- Two mounting holes match original housing configuration for straightforward bolt-up installation
Application Summary
1991, 1993-1995 Oldsmobile Cutlass Supreme 3.4L -CC 207CID V6 DOHC 24 Valve Naturally Aspirated GAS1991-1994 Pontiac Grand Prix 3.4L -CC 207CID V6 DOHC 24 Valve Naturally Aspirated GAS
1991-2001 Chevrolet Lumina 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1992-1997 Oldsmobile Cutlass Supreme 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994 Oldsmobile Cutlass Cruiser 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994, 1997-1999 Oldsmobile Cutlass 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994-1996 Buick Regal 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994-1996 Chevrolet Beretta 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994-1996 Chevrolet Corsica 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994-1996 Oldsmobile Cutlass Ciera 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994-1996 Pontiac Grand Prix 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994-1998 Buick Skylark 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994-1998 Oldsmobile Achieva 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994-1998 Pontiac Grand Am 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1994-2005 Buick Century 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1995 Buick Regal 3.8L 3800CC 231CID V6 OHV 12 Valve Naturally Aspirated GAS
1995-1998 Chevrolet Monte Carlo 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1996 Chevrolet Lumina APV 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
1996-1999 Pontiac Trans Sport 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
1996-2004 Oldsmobile Silhouette 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
1997-2003 Chevrolet Malibu 3.1L -CC 189CID V6 OHV 12 Valve Naturally Aspirated GAS
1997-2003 Pontiac Grand Prix 3.8L 3800CC 231CID V6 OHV 12 Valve Naturally Aspirated GAS
1997-2005 Chevrolet Venture 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
1999 Chevrolet Monte Carlo 3.8L 3800CC 231CID V6 OHV 12 Valve Naturally Aspirated GAS
1999-2004 Oldsmobile Alero 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
1999-2005 Pontiac Grand Am 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
1999-2005 Pontiac Montana 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
2000-2005 Chevrolet Impala 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
2000-2005 Chevrolet Monte Carlo 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
2001-2005 Pontiac Aztek 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
2002-2005 Buick Rendezvous 3.4L -CC 207CID V6 OHV 12 Valve Naturally Aspirated GAS
2004 Chevrolet Malibu 2.2L 2198CC 134CID L4 DOHC 16 Valve Naturally Aspirated GAS
2005-2006 Buick Terraza 3.5L -CC 213CID V6 OHV 12 Valve Naturally Aspirated GAS
2005-2006 Saturn Relay 3.5L -CC 213CID V6 OHV 12 Valve Naturally Aspirated GAS
2006 Buick Rendezvous 3.6L 3564CC 217CID V6 DOHC 24 Valve Naturally Aspirated GAS
2006 Pontiac Montana 3.5L -CC 213CID V6 OHV 12 Valve Naturally Aspirated GAS
2006-2007 Buick Rendezvous 3.5L -CC 213CID V6 OHV 12 Valve Naturally Aspirated GAS
Part Numbers: 5166KT
Specifications
- Brand: Motorad
- Part Number: 5166KT
- Part Type: Engine Coolant Thermostat Housing Assembly
- UPC: 055644687285
- GTIN: 00055644687285
- Package Dimensions: 13.2 x 12.2 x 6.2 IN
- Package Weight: 6.2 LB
- Package Quantity: EA
Returns
30-Day Money-Back Guarantee
We want you to be completely satisfied with your purchase! If you are not happy for any reason, you may return the item within 30 days for a refund, minus shipping fees, provided that: The part is brand new, uninstalled, and undamaged in any way.
To initiate a return, please contact us or email support@mizumoauto.com for a Return Authorization Number (RMA) and the return shipping address. Returns without an RMA number will be refused and returned to you at your expense.
Return Requirements:
- Items must be securely packed in the original manufacturer's packaging.
- All original materials must be included, such as hardware, manuals, protective caps, wrapping, and instructions.
- You must obtain and retain the tracking number for your return.
Non-Returnable Items:
- Piston rings, main bearings, and rod bearings are non-returnable if the manufacturer’s seal or shrink-wrapped plastic has been opened. No exceptions—this ensures the integrity of the parts you receive.
We are not responsible for lost or damaged returns. If your return is lost or damaged during shipping, a refund cannot be issued, as the item cannot be resold or returned to the supplier. Please file a claim directly with your shipping carrier for reimbursement.
Refunds are processed within 1-2 business days after we receive and inspect the returned item. Please allow this processing time before inquiring about your refund status.
Warranty
Mizumo Auto provides a 90-day Limited Warranty against defects in workmanship and materials under normal service conditions, effective from the original delivery date.
This warranty is non-transferable and applies only to the original purchaser. Coverage is limited to the replacement or refund of defective products.
Exclusions:
The warranty does not cover labor costs, damage resulting from accidents, misuse, alterations, or unauthorized modifications, as well as additional expenses such as towing, fluids, oils, car rentals, and any other parts not included in the original purchase.
Warranty Claims Process:
- All warranty claims must be pre-authorized and returned prepaid to Mizumo Auto for inspection and approval.
- No exchanges will be made for products that have been damaged, misused, or improperly installed. We strongly recommend professional installation.
- The buyer assumes all risk of damage resulting from improper installation.
All disputes related to transactions shall be resolved by a court of competent jurisdiction in Los Angeles County, California.
Shipping
We offer Free UPS Ground or USPS Ground Advantage shipping within the continental U.S. (48 states).
Shipping to Other Locations:
A delivery surcharge applies to shipments to: Alaska, Hawaii, Puerto Rico, U.S. territories, APO/FPO addresses, Canada, and international destinations.
Order Processing & Tracking:
- Orders are shipped Monday through Friday, excluding holidays.
- Orders placed before 3:00 PM PST will ship the same day, unless unexpected delays occur.
- A tracking number will be emailed within one business day after shipping.
If you do not receive a tracking number, please:
- Check your spam/junk folder.
- If it's not there, contact us via phone or eBay message for assistance.
International Orders:
Import duties, taxes, and brokerage fees are not included in the shipping fee. Please check with your shipping carrier and local customs office regarding any applicable fees before placing your order.