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America's Oldest Speed Shop ® 800.979.0122 Lincoln, NE
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800.979.0122

(CST) 7am - 10pm

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Mon-Fri 8am - 5pm

Canadian Order Line:

855.313.9180

International Order Line:

1.402.323.3200
Since 1952
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1949-1953 Flathead Ford V8 Thermostat

Specs
Material Type:
Steel
Sold in Quantity:
Each
Temp. Range:
-
Gasket(s) Included:
No
Garage Sale:
No
Overall Height:
1.48
Overall Diameter:
-
Mounted Height:
.81
1949-1953 Flathead Ford V8 Thermostat

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

Don't let your old flathead boil over – keep it running cool with new thermostats from Speedway. These thermostats sit in the water outlets on the top of the head, with the hose coming down over the water outlets, holding the thermostats in place. Remember, every flathead needs two of these!

  • OEM replacement
  • Two thermostats required for each engine
  • Available in 160° F or 180° F
  • Fits 1949-1953 Ford and Mercury flathead V8s

Learn more about the importance of the thermostat with cooling systems and how they work by reading our tech article. Cooling System Principles.

 

Specs


Customer Reviews

Rated 5 out of 5 by 5 reviewers.
RATING BREAKDOWN
5 reviews
5 Stars
5
4 Stars
0
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

Killroy
Verified Purchaser
Verified Reviewer
Palm Bay, Fla

Keeping it Cool

February 01, 2016
As with all thermostats, there is always a little tolerance, Having a flathead with different temps can be a little unnerving, both thermostats opened within a degree of each other, and held 180 degrees solid.
Pros:
  • Temp On Target
Yes, I recommend this product.
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customglen
Verified Purchaser
Maroa, Ill

Have purchased before and as always works like a champ.

July 28, 2015
As always, quick delivery. A very nice product but in my opinion gaskets should be furnished with the thermostat, not the goose neck.
Yes, I recommend this product.
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GaryC
Verified Purchaser
Victoria, BC, Canada

Ford Flathead parts

May 25, 2014
I thought I'd do an overall rating on Speedway, as I've made many purchases of items for my 1949 ford engine. Every item from water pumps to offy heads and intake manifold, oil filter to chrome goodies. All items surpass my expectations in quality and performance. Your commitment to good customer service is second to none. I'm a very happy Speedway customer. Thanks, Gary Clarke
Yes, I recommend this product.
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GaryC
Verified Purchaser
Victoria, BC, Canada

Ford Flathead parts

May 25, 2014
I thought I'd do an overall rating on Speedway, as I've made many purchases of items for my 1949 ford engine. Every item from water pumps to offy heads and intake manifold, oil filter to chrome goodies. All items surpass my expectations in quality and performance. Your commitment to good customer service is second to none. I'm a very happy Speedway customer. Thanks, Gary Clarke
Yes, I recommend this product.
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Motorhead
Verified Purchaser
Orange Park, Fl

Correct thermostat for my flathead.

July 20, 2010
No need to rummage around at the parts store for a thermostat that might fit; these are correct.
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

2 questions : 4 answers

2 answers

What temp of thermostat do I need? since you offer two different degree's of t-stat... what is the correct one to get? the 160 or the 180? I have a 49 flathead in my car that I just bought, and I am unsure of what the original one is. We live in Kansas and it gets hot in summer (over 100 degrees# but it get cold in winter as well. #below freezing) I do drive my car all year round.

HeroDave
Wichita, KS, USA
November 17, 2012

What temp of thermostat do I need? since you offer two different degree's of t-stat... what is the correct one to get? the 160 or the 180? I have a 49 flathead in my car that I just bought, and I am unsure of what the original one is. We live in Kansas and it gets hot in summer (over 100 degrees# but it get cold in winter as well. #below freezing) I do drive my car all year round.

Answers

May 27, 2013
Jakes
If the car is the original either will work. However, if the car is modified, or the car does not have the amount of air surrounding the engine as the original, than use the 160.
November 19, 2012
Jason
The 160 degree thermostat is the more commonly used, I would recommend the 160 for the all around conditions you will be driving in.
2 answers

Is there a different spec thermostat for the 1946 Ford flathead than the one specified for the 1949-'53 flathead?

mack the knife
olympia, wa.
May 20, 2011

Is there a different spec thermostat for the 1946 Ford flathead than the one specified for the 1949-'53 flathead?

Answers

June 23, 2011
John
These thermostats are for the 1949-53 Fords and are 2 1/8” diameter. If needing a thermostat for the earlier years we offer part number 91015801 and for the 1938-48 Fords measure 1 7/8”.
June 23, 2011
Jason
Yes, use part #91015801 for the '46 flathead
Page 1 of 1

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  • Reduces or eliminates bubbles that form on hot metal surfaces to reduce coolant temperatures by up to 20°
  • Superior heat transfer properties compared to glycol-based antifreeze
  • Compatible with new or used antifreeze (including DEX-COOL and long-life versions) to improve the heat transfer of ethylene and propylene glycol systems
  • Improves heat transfer and reduces cylinder head temperature
  • Designed for use with all modern aluminum, cast iron, copper, brass and bronze cooling systems
  • Cleans and lubricates water pump seals
  • Reduces cavitation and complexes with hard water to reduce scaling
  • Does not lower cooling system below the thermostatically-controlled temperature
  • 12 fl. oz. bottle treats 12-20 quarts

Water Wetter Tech Info (PDF)

Learn more about how cooling systems work with proper coolant mixture and additives by reading our tech article. Cooling System Principles.