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Mod to reduce engine bay heat for PT Cruiser Turbo's

12356 Views 56 Replies 14 Participants Last post by  rockdoc
Check out this great link:
View: https://www.youtube.com/watch?v=msFMU8Kw_v8


This very smart man shows you how to modify the engine bay sealing surface to let the hot air escape from the engine bay. I did the mod and checked it with a digital thermometer gun and it does help, you can feel the hot air escaping. If Chrysler did this when building the car maybe the computer would last longer. What a stupid place to put the PCM 6" away from the turbo.

I'm having problems with my 2004 PT Cruiser Turbo Touring. First got P0032 and P0038 and car stall out on the highway. Pretty scary when your car dies on the highway, thought it was going to be my last day on earth. Waited about 10 minutes and it started back up and drove home.

Changed both upstream and downstream O2 sensors with NTK (NGK) sensors. Check and cleaned all grounds, by battery box on fender well, and both sides of grounds from struts to under fender well. Outside my garage the engine just died while idling. Showed the same codes again. I just ordered a reman PCM from AllComputer and hope that it cures the problem.

The car was previously owned by my 90 year old father and only has 47K miles on it. I love the style of the car, and always thought Chrysler were quality cars...now I know better.
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This is all based on the assumption that the computer is at fault and that a failure is heat-related, and that that heat is delivered from the engine compartment. Too many assumptions and not enough proper diagnostic work.
 
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Aloha George,

You got a good idea. The way I did it was to create a "chimney effect", but maybe your way is better as you can always just put the weather stripping back in without any breaks. The whole idea is getting excess heat out of the engine compartment and anything is better than nothing. You can shoot a digital heat thermometer against the windshield to see what the difference in temperature is which gives you an idea on how much heat is escaping.

To me PCM's should not be in the engine compartment. My daughter had a honda civic and the computer was in the footwell on the passenger's side, far cooler place for it.
Many cars have a computer there, but it's not the PCM. The PCM needs active cooling, since the MOSFETs get hot on their own. It's why they put the intake air across them, or used to.

And a "fairly safe bet" is an expensive way to diagnose a car. I prefer to know.
 
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