PoopJeep
NAXJA Forum User
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Back in February I found a crack in my 0331 head the day it must have come to light... Regardless I scooped up a 0720 head cheap and then had it refinished for another 65 bucks. It was in great condition and such so I went on with my swap finishing it up right before surgery.
I have gone through the whole 0630 & 0720 head swap "Bible" and took everything and followed the information with exception of the exhaust manifold. I understand some people say that it WILL NOT seal properly but also through some of those same threads I read a few people who did get the 2 piece cast manifolds to work on a 0630/0720 head. I NEED to make my 2000 (2) piece manifolds to work I do not have any other choice.
I have a Cali Emissions bullshit set up with the 2 mini cat / pre cats and 4 oxygen sensors.
I DO NOT have a job any more as I was laid of 1 week after I returned from reconstructive surgery. I have 0 income thus it HAS to work
I DO NOT have any money to buy or fabricate or swap other parts on as my Jeep was T-boned by a box truck after only walking again for 15 days and only the 4th time driving the Jeep since putting on the head.
Those are all the reasons I have to make the 2000 headers work on a 0720 head.
I am aware that the ports are smaller by roughly 3/8". The 0720 ports are 3/8" larger in depth. I saw that there was an adaptor plate and all it looked like was the 0331 manifold gasket made into a sheet of aluminum so that it had something to seal against. If this is the case why couldn't I just use the 0331 gasket against the side of the block as it is just as smooth and structurally sound? I understand that the exiting exhaust gases will hit a headwall as it leaves possibly causing reversion and providing additional heat but seeing as the exhaust manifold ports have some thickness to them wouldnt that provide enough pressure against the head to seal them off simply using just the 0331 gasket & manifolds?
I understand most answers would consist of "aftermarket headers are larger ports and they would work" but I unfortunatly do not have that luxury as No Job = No funds. What little funds I had went into getting a new head as the Jeep was the only thing I could drive after surgery and then some clown blew a redlight at 50mph in a box truck and Pwn'd my Jeep. Luckly I was able to use a buddies winch to pull everything back and it runs & drives minus its fugly with a black hood & blue fender but other than that I got screwed there is no money to buy new parts and I need to make this happen.
To anyone who's post I read about not having a problem using the 0331 manifold on the 0630/0720 head PLEASE inform me how you did it or what gasket you used or anything that might help me out.
I have gone through the whole 0630 & 0720 head swap "Bible" and took everything and followed the information with exception of the exhaust manifold. I understand some people say that it WILL NOT seal properly but also through some of those same threads I read a few people who did get the 2 piece cast manifolds to work on a 0630/0720 head. I NEED to make my 2000 (2) piece manifolds to work I do not have any other choice.
I have a Cali Emissions bullshit set up with the 2 mini cat / pre cats and 4 oxygen sensors.
I DO NOT have a job any more as I was laid of 1 week after I returned from reconstructive surgery. I have 0 income thus it HAS to work
I DO NOT have any money to buy or fabricate or swap other parts on as my Jeep was T-boned by a box truck after only walking again for 15 days and only the 4th time driving the Jeep since putting on the head.
Those are all the reasons I have to make the 2000 headers work on a 0720 head.
I am aware that the ports are smaller by roughly 3/8". The 0720 ports are 3/8" larger in depth. I saw that there was an adaptor plate and all it looked like was the 0331 manifold gasket made into a sheet of aluminum so that it had something to seal against. If this is the case why couldn't I just use the 0331 gasket against the side of the block as it is just as smooth and structurally sound? I understand that the exiting exhaust gases will hit a headwall as it leaves possibly causing reversion and providing additional heat but seeing as the exhaust manifold ports have some thickness to them wouldnt that provide enough pressure against the head to seal them off simply using just the 0331 gasket & manifolds?
I understand most answers would consist of "aftermarket headers are larger ports and they would work" but I unfortunatly do not have that luxury as No Job = No funds. What little funds I had went into getting a new head as the Jeep was the only thing I could drive after surgery and then some clown blew a redlight at 50mph in a box truck and Pwn'd my Jeep. Luckly I was able to use a buddies winch to pull everything back and it runs & drives minus its fugly with a black hood & blue fender but other than that I got screwed there is no money to buy new parts and I need to make this happen.
To anyone who's post I read about not having a problem using the 0331 manifold on the 0630/0720 head PLEASE inform me how you did it or what gasket you used or anything that might help me out.