Aftermarket cooler running thermostat
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6th Gear
Joined: May 2023
Posts: 6
Likes: 2
Aftermarket cooler running thermostat
Forgive me if there are other threads about this topic. I did a search and didn't see any threads titles jumping out at me regarding thermostats.
My primary water pump has failed, and I thought I may as well replace the thermostat while I'm having the water pump replaced. I have a '15 model 6.7 with 144k miles, btw.
I came across an aftermarket primary thermostat, the double one, that opens about 20 degrees cooler than the OEM ~200°F that comes installed. It got me thinking, is cooler better? Is it only better depending on the geographic location of where one lives?
So I thought, if cooler is better, why didn't Ford engineers have a ~180°F'ish thermostat installed to begin with? I'm pretty sure engines have an optimal operating temperature.
Maybe "cooler is better" is an idea, a concept, that merchants use in hopes to establish a belief in someone so they make the purchase and get what they're after, which is the dollars in our wallets. Thoughts?
My primary water pump has failed, and I thought I may as well replace the thermostat while I'm having the water pump replaced. I have a '15 model 6.7 with 144k miles, btw.
I came across an aftermarket primary thermostat, the double one, that opens about 20 degrees cooler than the OEM ~200°F that comes installed. It got me thinking, is cooler better? Is it only better depending on the geographic location of where one lives?
So I thought, if cooler is better, why didn't Ford engineers have a ~180°F'ish thermostat installed to begin with? I'm pretty sure engines have an optimal operating temperature.
Maybe "cooler is better" is an idea, a concept, that merchants use in hopes to establish a belief in someone so they make the purchase and get what they're after, which is the dollars in our wallets. Thoughts?
Super Moderator
Joined: Aug 2008
Posts: 37,379
Likes: 1,863
From: Frederick, MD
in days of old heat management was far more critical due to the technology of the day.
Now heat will assist with better fuel economy and all engine operating components.
Oils and such are made for the increase temps.
Our cooling systems are designed to handle the increases but also to keep the temps from getting out of hand too.
Run the stock thermostat.
Now heat will assist with better fuel economy and all engine operating components.
Oils and such are made for the increase temps.
Our cooling systems are designed to handle the increases but also to keep the temps from getting out of hand too.
Run the stock thermostat.
Lead Driver
Joined: Feb 2022
Posts: 7,968
Likes: 4,043
Running cooler on a Diesel is opposite of a gas engine. Years back, 1999 era, The 7.3 powerstroke ran too cool from the factory so some companies made 203* T-stats as replacements so the engine would heat up faster and run hotter. Diesels are more efficient running hot, they can run a little leaner and get a cleaner burn. It also helps keep temps up when idling since an idling diesel uses very little fuel and not a lot of heat from combustion.
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