overheating from heat soak

[WSS]

Looking for some real world info on hemi's stuffed in JKU's. I am still having a heat soak or air flow problem. I have a Ron Davis radiator system with twin 12" spal fans, old style noisy ones. My issue is at highway speeds under load. As soon as I start a grade, the coolant temps rise to 230, when the grade is over (flat or downhill) the temps drop to 190. Trans temp never goes above 190, usually around 170. I am going to seal the bottom of the radiator for more forced air through the grill.

I have removed the inner fender liners for more flow, is this counter intuitive? Will this make the problem worse? Also, do hood louvers work in this situation?

I gotta get this fixed cause it is going to catch me one of these days.

 

[Cimmerian]

Did you do the install yourself or used a swap shop? You might want to contact one of hemi swap specialists like AEV about it if you haven't already.

 

[BLACKJKU]

Do you have one of those expensive hoods like I do with the vents in it? The cool air comes in and the heat will rise if it can vent out it could make a difference, otherwise your just blowing the heat around in there until it can try to get it pushed out.

 

[WSS]

I did not swap myself. It was done as a kit by "hemiswap.com" which is out of business now. The actual install was done out of a shop in Gilbert AZ, as best I can tell. It was done in 2009 for the 2010 sema show by the owner of discount tire. I don't think it was offroaded much until I got it as the third owner. I have found all the weak spots like the overheating. the Jeep has 68k on it and the swap was done at 28k (along with all the undercarriage and bling).

I do have one of those "expensive hoods" but it lacks any useful vents. It has a "cowl induction" type setup but the hemi runs a K&N type, so the cowl system is not used. It is a "GR8tops" brand as far as I can find.

 

[BLACKJKU]

I did not swap myself. It was done as a kit by "hemiswap.com" which is out of business now. The actual install was done out of a shop in Gilbert AZ, as best I can tell. It was done in 2009 for the 2010 sema show by the owner of discount tire. I don't think it was offroaded much until I got it as the third owner. I have found all the weak spots like the overheating. the Jeep has 68k on it and the swap was done at 28k (along with all the undercarriage and bling).

I do have one of those "expensive hoods" but it lacks any useful vents. It has a "cowl induction" type setup but the hemi runs a K&N type, so the cowl system is not used. It is a "GR8tops" brand as far as I can find.

View attachment 131030

My hood has vents in the top on each side of the center.