GreatOdin'sRaven
NAXJA Forum User
- Location
- Las Vegas, NV
1999 limited - 6cyl/4.0.
Had a rusted freeze plug - causing slow leak and over heating.
Removed valve cover, head cylinder, fuel injectors, intake manifold, exhaust manifold.
Took head cylinder to shop. No cracks. Had it Cleaned it up, new valve seals installed.
Inspection of parts:
1) Cracked intake manifold: purchased this: Dorman 615-610 Intake Manifold https://www.amazon.com/dp/B009ZBQDUG/ref=cm_sw_r_cp_apip_k5jkTmoTHLENu
2) cracked/corroded fuel injectors - purchased these: http://m.ebay.com/itm/271530798451?_mwBanner=1
3) Exhaust manifold cracked in multiple
Places - purchased this: DNA Motoring HDS-JC9140-BK Stainless Steel Exhaust Header Manifold https://www.amazon.com/dp/B00QKJGKIQ/ref=cm_sw_r_cp_apip_i5VWULFX5P5xy
I followed the installation of everything to the T.
Installed head cylinder, new exhaust manifold (with loose down pipe), new intake manifold with new hardware.
Here's what I noticed: the exhaust manifold and the intake manifold flanges were not the same thickness.
This new exhaust manifold flanges is thinner than the stock one.
The bolts go in straight but since the flanges are different in thickness, the washers go on a little slanted.
I torqued down new harware in the correct sequence following the Haynes manual and put everything else back together.
When I started the Jeep, it sounded like it was trying to escape from hell.
The first few attempts it sputtered and died. After that it seems as if its trying to commit suicide by RPM death, instantly climbing to 4 or 5k before I promptly shut it back off.
Since the engine has only been on for a few seconds, it's hard to investigate much, but I know for sure there's an exhaust leak
What I tried so far to fix the problem:
1) checked all vaccume lines, sensors and plugs
2) cleaned the IAC sensor
3) cried
4) googled this sh**
After searching, I found that other people have had the same issue as me after replacing exhaust gasket or exhaust manifold
My question is: has anyone else ever seen such a thin aftermarket exhaust manifold flange? what would you do in my situation to fix this? Do you think the difference in thickness is causing the problem? Should I shave down the intake part?
Sent from my iPhone using Tapatalk
Had a rusted freeze plug - causing slow leak and over heating.
Removed valve cover, head cylinder, fuel injectors, intake manifold, exhaust manifold.
Took head cylinder to shop. No cracks. Had it Cleaned it up, new valve seals installed.
Inspection of parts:
1) Cracked intake manifold: purchased this: Dorman 615-610 Intake Manifold https://www.amazon.com/dp/B009ZBQDUG/ref=cm_sw_r_cp_apip_k5jkTmoTHLENu
2) cracked/corroded fuel injectors - purchased these: http://m.ebay.com/itm/271530798451?_mwBanner=1
3) Exhaust manifold cracked in multiple
Places - purchased this: DNA Motoring HDS-JC9140-BK Stainless Steel Exhaust Header Manifold https://www.amazon.com/dp/B00QKJGKIQ/ref=cm_sw_r_cp_apip_i5VWULFX5P5xy
I followed the installation of everything to the T.
Installed head cylinder, new exhaust manifold (with loose down pipe), new intake manifold with new hardware.
Here's what I noticed: the exhaust manifold and the intake manifold flanges were not the same thickness.
This new exhaust manifold flanges is thinner than the stock one.
The bolts go in straight but since the flanges are different in thickness, the washers go on a little slanted.
I torqued down new harware in the correct sequence following the Haynes manual and put everything else back together.
When I started the Jeep, it sounded like it was trying to escape from hell.
The first few attempts it sputtered and died. After that it seems as if its trying to commit suicide by RPM death, instantly climbing to 4 or 5k before I promptly shut it back off.
Since the engine has only been on for a few seconds, it's hard to investigate much, but I know for sure there's an exhaust leak
What I tried so far to fix the problem:
1) checked all vaccume lines, sensors and plugs
2) cleaned the IAC sensor
3) cried
4) googled this sh**
After searching, I found that other people have had the same issue as me after replacing exhaust gasket or exhaust manifold
My question is: has anyone else ever seen such a thin aftermarket exhaust manifold flange? what would you do in my situation to fix this? Do you think the difference in thickness is causing the problem? Should I shave down the intake part?
Sent from my iPhone using Tapatalk
