Did some work on the XJ this weekend. I knew I had a manifold crack so I removed the manifolds and welded the exhaust manifold. It was cracked almost all the way around one of the two tubes welded to the collector. I believe this was due to a broken engine mount. I have discovered that the engine mounts do not hold up very well on these things. So I replaced the engine mount and decided to fill the gap between the rubber part of the mount and the limiting strap with JB Weld to limit how much the mount will flex. I was sorta in a hurry to get it fixed so I didn't let the JB weld cure before installing the mount. Also, I wanted it to cure with the bolts tight on the mount so it would be properly fitted when cured. Well even though JB Weld is thick and quite sticky, I found out the hard way it will flow out of something like molasses until it cures for quite some time. It made quite a mess in the garage floor and on top of my front diff. Next time I won't be in a hurry and I will tape up the sides to prevent the stuff running out. So anyway, while I had it apart I also installed some Ford Mustang fuel injectors I got on E-fence for $20. These injectors are 19lb/hr units and have 4 holes in the nozzle instead of one in our Jeep nozzles. All was well until I turned the key on. The damn thing had a leaky injector. I took it back apart and changed the seal that had been pinched on installation. I then repeated the procedure two more times as two other injectors got pinched on installation. These things are not easy to install without pinching the seals. I did lube the seals with vaseline before installation. It is just hard to align the fuel rail on the injectors and push it down without pinching a seal. Anyway I managed to get it all back together and I will check the mileage to see if the Ford injectors help mileage any. A note about the injectors: they can be had cheap, I got mine for a $20, they are a direct replacement, they are identical to the Jeep injectors in how they fit. If you replace them replace the seals and I recommend buying a few extra seals just in case you pinch one or more on installation. BTW if anybody needs a set of good used injectors they are a gimme, just pay shipping.
3946
So that utterly clean engine bay was severely compromized? By yourself?
Keep us posted about the performance and milage of the Ford injectors. When I had a leaky one it was the injector itself, and not just the seal. (It almost choked the GF and luckily didn't set the engine on fire.) But as Ford injectors are not so common over here, I was lucky to get the same type used and not leaking...
Keep us posted about the performance and milage of the Ford injectors. When I had a leaky one it was the injector itself, and not just the seal. (It almost choked the GF and luckily didn't set the engine on fire.) But as Ford injectors are not so common over here, I was lucky to get the same type used and not leaking...
Sounds like a good idea on those injectors. I don't need injectors but I sure could use an H/O intake manifold that will fit a 94 Wrangler H/O (probably any H/O motor from the 90's forward)
I bought the 94 Wrangler H/O motor to put in my XJ, but it didnt come with an intake, so we bought what we THOUGHT was an H/O intake off of Ebay, well, it wasnt...so now I have 2 Non-H/O intake manifolds.
I bought the 94 Wrangler H/O motor to put in my XJ, but it didnt come with an intake, so we bought what we THOUGHT was an H/O intake off of Ebay, well, it wasnt...so now I have 2 Non-H/O intake manifolds.
After more driving I have to say that those injectors made a bigger difference than I first thought. I noticed a remarkable improvement in passing mode from about 45mph or so. I actually felt pushed back into the seat a little. Part of the change could be due to fixing the exhaust leak. It has been my experience that stock heads work better with a little back pressure and that putting a free flowing exhaust on stock heads results in a net loss of power. I have a fee flowing muffler (a 3 chamber flowmaster) but the midpipe I think is the most obstructed part. After that is probably the header or the stock cat. I think a head rework with bigger valves, some port work, and port matching would be necessary to get the most from a free flowing exhaust. I would love to do this work as well as an extrude hone job and a 4.7 stroker kit with a Kenne Belle supercharger. (waking up and wiping drool from keyboard).
G
No John....you need to keep you eye out for a Hemi....not THAT would wake up the ole beast....
I dare say though that doing an engine swap might get a little grease on that clean garage floor of yours.......he he
I've already decided that when the 4.0 gives out, I'm doing a v6 or v8 swap with a newer engine......
I dare say though that doing an engine swap might get a little grease on that clean garage floor of yours.......he he
I've already decided that when the 4.0 gives out, I'm doing a v6 or v8 swap with a newer engine......
I've got an early XJ with an AMC401 v8 in it /ubbthreads/images/graemlins/tongue.gif No, it doesn't really fit and you may shudder to see the hack-job that went into shoe-horning the beast in. I bought the truck like this just to pull the engine and drop it into something more worthy, like my YJ....
I've seen a 318-powered '84 XJ that was rather nicely done
I've seen a 318-powered '84 XJ that was rather nicely done
G
I'm a few years away from trying it....so motor selection is a mute issue right now....a lot can change in 5 years....besides, I want to wait until the boys are old enough to help....I figure it would make a good project to keep them ocupide over a summmer.....
But if I had to throw out a guess....it would be one of the newer Chry engines...I'm sure one of their V6's would be small enough to fit and have more power than even a 4.0 HO....and get better gas mileage. After doing the SBC in my 84 CJ, I'm not at all worried about the wiring aspect.
But if I had to throw out a guess....it would be one of the newer Chry engines...I'm sure one of their V6's would be small enough to fit and have more power than even a 4.0 HO....and get better gas mileage. After doing the SBC in my 84 CJ, I'm not at all worried about the wiring aspect.
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