Reducing underhood temps ??
01-18-2018, 10:25 AM
#61
CF Veteran
Just tried to search it but no good. I remember the mention of burnt paint though. They said they were going to try and insulate or deflect the heat but I never read anything more unless I missed it.
01-18-2018, 11:42 AM
#62
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Join Date: May 2015
Location: Arizona
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Year: 97
Model: Cherokee
Engine: 4.0
01-23-2018, 01:38 PM
#63
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Join Date: Dec 2016
Location: Oregon
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Year: 2001
Model: Cherokee(XJ)
Engine: 4.0
Long term report here on hood vents.
Installed Pontiac GTP vents in April 2010. Almost 8 years ago. I installed them because all other efforts to curb heat soak had failed. The introduction of ethanol in winter blends started the problem. Keep in mind the 01 has the two pre cats holding lots of heat under the hood while stopped. My theory at the time was the ethanol was evaporating during stops. I only noticed heat soak issues in the winter months and during quick stops like running into a store. The vents did their job allowing the heat to escape during engine off time. You could see heat rising up and away and at a rapid pace like a chimney effect.
As for water getting in, well everyone knows it rains cats and dogs here in western Oregon during the winter. Sometimes we get the monsoon rains. Sometimes we get heavy snows where several inches will sit on the hood. I have never had issues with enough water getting in to cause damage. No rust, extra dirt, or compromised electrical issues.
If I had an uncut hood would I do it again? Heck yeah! It works for me but I would choose a different vent.
Installed Pontiac GTP vents in April 2010. Almost 8 years ago. I installed them because all other efforts to curb heat soak had failed. The introduction of ethanol in winter blends started the problem. Keep in mind the 01 has the two pre cats holding lots of heat under the hood while stopped. My theory at the time was the ethanol was evaporating during stops. I only noticed heat soak issues in the winter months and during quick stops like running into a store. The vents did their job allowing the heat to escape during engine off time. You could see heat rising up and away and at a rapid pace like a chimney effect.
As for water getting in, well everyone knows it rains cats and dogs here in western Oregon during the winter. Sometimes we get the monsoon rains. Sometimes we get heavy snows where several inches will sit on the hood. I have never had issues with enough water getting in to cause damage. No rust, extra dirt, or compromised electrical issues.
If I had an uncut hood would I do it again? Heck yeah! It works for me but I would choose a different vent.
08-01-2022, 01:46 PM
#64
I like the idea of hood vents, and many look cool. But the reality is if your engine and cooling system are operating properly then they are not needed. Mine runs around 210 at 65mph or at 5mph. As it should be. If it runs cooler than 210 it is not operating at optimal temperature. The Jeep engineers were not stupid and your Jeep is not supposed to run cooler than that.