W8800783 - Workhorse 8.1L/7.4L Engine Coolant Thermostat w/ Seal

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Part# W8800783

Description:

Engine Coolant Thermostat - 195 Degree for Workhorse 8.1L & 7.4L Engines
Includes Thermostat Gasket (24577118)

Applications:

All Workhorse Chassis with 8.1L and 7.4L engine.

Who makes this part? Is it an OEM replacement part from GMC or AC Delco? ( Robert Fister, 11/22/2023 )

This part is made to OEM specifications by Gates. ( Support )

Can I replace the 195 degree thermostat with a 180 degree and what is coolant capacity for 2003 8.1L Workhorse chassis? ( Steve L. Wright, 01/17/2021 )

You can replace it with a 180* thermostat but you will lose a good amount of defrost and heater performance. The 8.1L was designed to operate with the 195* thermostat and I see no measurable advantage to switching. ( Support )

Hi Guys,... My temperature gauge is fluctuating and today, it stayed at cold, even after 10 minutes of driving... It then came back to normal and stayed that way for the next 100 miles...My guess is the 'thermostat'... I have had some overheating issues in the extremely hot weather in Mexico and AZ... I'm wondering if this could have damaged the sensor or something... My question is:,..Where does it go?... I have read everything I have and asked Google and YouTube, but, no luck as to the location to replace the old one... Can you help me with this, please? Peace, Val Ingham 2003 P32 Workhorse 8.1 ( Valerie Ingham, 06/16/2020 )

Not answered yet.

Can one buy a185 for my 8.1 ; as I have two, my Adventure and my pickup ( Terry Watt, 11/13/2017 )

Not answered yet.

Hi looking at your 195 degree thermostat for a 2006 8.1L. Is this different to the original one install on my engine or is it the same degrees? ( Damon, 05/02/2017 )

Hi Damon,

Yes all the 8.1L's use the same 195* thermostat, W8800783.

( Support )

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WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov

VIN Verification Service Item

This product allows for a VIN verification service.

VIN part verificaion is a service that we provide free of charge when a part is purchased.
When you provide your VIN below we will personally verify your part selection by your VIN before shipment of your order.
This helps ensure that this is the correct part for your vehicle.
This is not an automatic VIN check, it is done by a parts specialist once order is placed.
We can only VIN verify vehicles back to model year 1996, if older we can help but can't guarantee fitment.
If you would like to have your part selection verified before purchase please call or email us.