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-   -   3.7 WK Headers install pics and hints (http://www.jeepgarage.org/f183/3-7-wk-headers-install-pics-and-hints-62058.html)

LandEagle 06-27-2013 06:41 PM

3.7 WK Headers install pics and hints
 
its about
JBA - jbaheaders.com
# 1930S

http://landeagle.com/jg/37headers/jba.jpg
http://landeagle.com/jg/37headers/jba2.jpg


They are originated for KJ,but they fits WK also.


Some 16 months ago i found them damn cheap on ebay (seller: exhaustseller).

I was looking for aftermarket headers cause mine stock start to sound like cracked ones.


Friend of mine instaled them for me some 7 months ago. Instalation took some 5hours for single person.


As reported by STRONGJEFF in the 3.7 lovers thread (http://www.jeepgarage.org/f183/3-7l-...tml#post446207), there is possible for the 2008+ models, that the JBA headers rubs a bit on the steering.

http://landeagle.com/jg/37headers/strongjeff001.jpg
http://landeagle.com/jg/37headers/strongjeff001.jpg


To avoid this, we created a smal dimple in the critical area into the header to become more space.

http://landeagle.com/jg/37headers/dimple.jpg

But as other jeepers reported later on, for the 2005 models there is no need to do that. They dont rub for on the steering.
My install detail confirms:

http://landeagle.com/jg/37headers/place.jpg


I used also Thermotec Generation II Copper Exhaust Insulating Header Wrap and Adhesive Backed Heat Barrier from Thermotec.com to avoid any danger for the steering.
IT works!

http://landeagle.com/jg/37headers/wraped.jpg

This wrap-mod casuses also, your gasses are blowen out from the headers much faster. This is good for hp gain.
Thermo-Tec : Adhesive Backed Heat Barrier
Thermo-Tec : Generation II Copper Exhaust Insulating Header Wrap

Its recomended to use thermotec special spray before you instal the wrapped headers. Thermo-Tec : Hi-Heat Coating
The wrap longevity becomes major improovement. Be also sure, you have some of theirs thin steel heat clamps. They are needed to secure the wrap ends.

For the instalation i used brand new stock header sealing from mopar. (I lost the JBA sealing somewhere) It works also.

I used the 4 stainless steel bolts and nuts delivered fith JBA to mount the exhaust pipes to the headers. This was a big fail. There is no rust :) to make then tight enought so they are still getting loose by the machine vibration.

After second atempt to make them tight during some 3000 miles, i changed them for some longer, not stinless bolts and i used two nuts on each bolt to make them stable. And they are.

Its noyt a race care, just my daily driver. Anyway, this upgrade bring noticeable improvement at 3000rpm+

Must Have ;)

... oh yes, my factory ones were not cracked, just the pipe nuts were loose :))

http://landeagle.com/jg/37headers/side.jpg
http://landeagle.com/jg/37headers/side2.jpg
http://landeagle.com/jg/37headers/floor.jpg

Strongjeff 06-27-2013 08:40 PM

Re: 3.7 WK Headers install pics and hints
 
wow man, good info, glad I can contribute

Strongjeff 06-27-2013 08:46 PM

Re: 3.7 WK Headers install pics and hints
 
actually the bolt for the y-pipe are low grade grade 5 bolt when they should be grade 8. I had the issue at first when the y-pipe and header separarted going down the road

OH7wk 09-23-2013 10:41 PM

Re: 3.7 WK Headers install pics and hints
 
great info definitely moved up on my mod list!!!

LandEagle 01-25-2014 02:58 PM

Re: 3.7 WK Headers install pics and hints
 
... some 22.000miles later

http://www.xtr.cz/wk/cracked_jba_headers/001.jpg

http://www.xtr.cz/wk/cracked_jba_headers/002.jpg

http://www.xtr.cz/wk/cracked_jba_headers/003.jpg

http://www.xtr.cz/wk/cracked_jba_headers/004.jpg

LandEagle 01-25-2014 03:23 PM

Re: 3.7 WK Headers install pics and hints
 
my suspect for the dammage is the insulation wrap

seems to me, there is some experience at JBA with this, see

http://www.xtr.cz/wk/cracked_jba_headers/xx.jpg

Strongjeff 01-25-2014 08:07 PM

Re: 3.7 WK Headers install pics and hints
 
Im running unwrapped on mine. Had to plug a hole on the right header in the collector. I suspect I cuzed it from over tightening the bolts on that side cuz I had issues with em coming out. Didn't and still no cracks like that tho....

Strongjeff 02-11-2014 08:22 PM

Re: 3.7 WK Headers install pics and hints
 
Just wondering bro, did you repair or replace the headers yet? It may be easier to have the cracks welded shut. And more cost effective too.

LandEagle 02-17-2014 04:47 AM

Re: 3.7 WK Headers install pics and hints
 
I put my factory ones back. Throwed away the cracked into trash can.

Strongjeff 02-17-2014 04:49 AM

Re: 3.7 WK Headers install pics and hints
 
Quote:

Originally Posted by LandEagle (Post 977255)
I put my factory ones back. Throwed away the cracked into trash can.

ahhhh man. I woulda welded back together for you

LandEagle 02-24-2014 06:11 AM

Re: 3.7 WK Headers install pics and hints
 
Quote:

Originally Posted by Strongjeff (Post 977256)
ahhhh man. I woulda welded back together for you

ahhh, man. too late for running usheaders i europe coreavelded :)

Strongjeff 02-24-2014 06:14 AM

Re: 3.7 WK Headers install pics and hints
 
that suck man


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