Reducing underhood temperature
#1
Reducing underhood temperature
I pop the hood when I park in the garage and everything from the prop rod to the air filter box is usually very hot, especially after slow driving off road. Now I realize that this is to be expected, but the heat coming out of the engine bay is definitely hotter than any vehicle I have owned before. I also noticed this is the only vehicle I've owned that has weatherstripping sealing the sides of the engine bay in addition to the leading edge of the hood and the firewall.
My question was if this weatherstripping on the side of the engine bay could be contributing to the high underhood temps. So I pulled the weather stripping off the sides and found it does a few things.
1. The engine bay is definitely cooler after normal highway driving. The airbox is cool, the prop rod isn't so hot, and the plastic covering the battery box is a lot cooler.
2. After slow off road driving, the engine bay is still pretty hot, but the airbox and prop rod seem a bit cooler but I don't have an temp sensor to know the exact reading.
3. The upper fenders get hot from the hot air escaping from under the hood, especially when driving slow off road. With the weatherstripping, they don't seem to change temp at all.
So my question is, is there anything that could be adversly affected by doing this? Has anyone else tried this?
BTW, my fan clutch is brand new and the temp gauge never indicates the motor is getting hot.
My question was if this weatherstripping on the side of the engine bay could be contributing to the high underhood temps. So I pulled the weather stripping off the sides and found it does a few things.
1. The engine bay is definitely cooler after normal highway driving. The airbox is cool, the prop rod isn't so hot, and the plastic covering the battery box is a lot cooler.
2. After slow off road driving, the engine bay is still pretty hot, but the airbox and prop rod seem a bit cooler but I don't have an temp sensor to know the exact reading.
3. The upper fenders get hot from the hot air escaping from under the hood, especially when driving slow off road. With the weatherstripping, they don't seem to change temp at all.
So my question is, is there anything that could be adversly affected by doing this? Has anyone else tried this?
BTW, my fan clutch is brand new and the temp gauge never indicates the motor is getting hot.
#2
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a few
There are a few ways to do this. there is header wrap which some people use and a some ceramic coatings , one called jet-hot is another. They have been shown to reduce underhood temps from up to 70%. There is some who say header wrap can make headers fail so do some research before trying any of these.
Good luck, Chris
Good luck, Chris
#7
#8
Join Date: Apr 2006
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All Disco engine compartments have run hot with our V-8 engines cause the original build design was for a 4 cylinder diesel and there was plenty of air flow.
The weather strip is not the problem, it is limited air flow.
The only thing the excess heat damages is our plug wires and I doubt we can ever cool it down so it is cooler to the touch.
One thing that does help a little would be to use a product like water Wetter or Purple Ice, it help help the engine disapate heat better but then there is still the issue of getting rid of that hot air.
Have all you D2 owners removed the plastic shield from under the front of your trucks, this will help some.
The weather strip is not the problem, it is limited air flow.
The only thing the excess heat damages is our plug wires and I doubt we can ever cool it down so it is cooler to the touch.
One thing that does help a little would be to use a product like water Wetter or Purple Ice, it help help the engine disapate heat better but then there is still the issue of getting rid of that hot air.
Have all you D2 owners removed the plastic shield from under the front of your trucks, this will help some.
#9
All Disco engine compartments have run hot with our V-8 engines cause the original build design was for a 4 cylinder diesel and there was plenty of air flow.
The weather strip is not the problem, it is limited air flow.
The only thing the excess heat damages is our plug wires and I doubt we can ever cool it down so it is cooler to the touch.
One thing that does help a little would be to use a product like water Wetter or Purple Ice, it help help the engine disapate heat better but then there is still the issue of getting rid of that hot air.
Have all you D2 owners removed the plastic shield from under the front of your trucks, this will help some.
The weather strip is not the problem, it is limited air flow.
The only thing the excess heat damages is our plug wires and I doubt we can ever cool it down so it is cooler to the touch.
One thing that does help a little would be to use a product like water Wetter or Purple Ice, it help help the engine disapate heat better but then there is still the issue of getting rid of that hot air.
Have all you D2 owners removed the plastic shield from under the front of your trucks, this will help some.
As far as the vents, they would definitely help, jeep guys do this all the time. Jet hot would help as well, but the heat still wouldn't have anywhere to go unless it was vented.