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    Re: Valve cover gasket

    The type of gasket you'll need depends on the valve cover you have. The type of head doesn't matter and yes, the 7120 was fitted from '91-95.
    Valve cover gaskets come in two flavors; a cork gasket...
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    Re: Injectors again!

    I have your answer.

    http://www.jeep4.0performance.4mg.com/tech_specs.html

    The problem is that most of the injectors are flow rated to 43.5psi (3 bar) and you're running a stock 39psi fuel...
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    Re: Jet performance chips

    I first installed the JET Stage 2 PCM on my Jeep about 20 years ago, and my experience of it is that it's a complete waste of money.
    Shoot an e-mail to Chris Jensen at [email protected] and ask...
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    Re: Front End Chirping

    I just checked again a few minutes ago. I used my stethoscope and pinpointed the chirp to the front driveshaft. I'm almost certain that the noise is being caused by dried up needle bearings inside...
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    Front End Chirping

    My Jeep suddenly developed an annoying chirping sound coming from the front end about a week ago. It literally sounds like the Jeep has adopted a pet bird, and the chirping increases in frequency...
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    Re: Saving the 4.0L

    That's not the problem with the straight six and even if it was, it would be easy enough to route an extra coolant pipe to the back of the cylinder head to rectify it.
    It IS possible to meet tighter...
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    Re: Saving the 4.0L

    Hesco toyed with the idea of producing a 4.0L aluminum block for a long time but I believe they've abandoned that project due to low demand and the prohibitively high cost of each block. Aluminum has...
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    Re: Engine replacment

    I suggest you go to http://www.jeepstrokers.com and register as a member. You'll find me there posting under the same username, and one of the members is a guy called Russ Pottenger who has a very...
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    Re: Rear end whine under acceleration

    Yes, I think you have indeed answered your own question unless you have a wife or girlfriend hiding inside the rear differential. ;) From the link...
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    Re: Torque to Gear to Tire Size

    Here's what I'd recommend as a rough guide for a 3500lb curb weight Jeep with a 4.6L stroker and a 5-speed manual tranny. Keep in mind that other factors also need to be considered.

    27-28" tires:...
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    Re: Torque to Gear to Tire Size

    With a 15% increase in engine displacement, you can expect roughly a 15% increase in peak TQ.
    I'm running a 4.6 stroker in my XJ. It's also a 5-speed with stock 3.07 gears but my tires are only...
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    Re: 2000 XJ sport runs like crap when hot.

    Yeah, I wrapped the straps around the manifold on all sides so that even if the glue on the thermal barrier does lose its adhesion, the barrier can't go anywhere! It's worked like a charm and you'll...
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    Re: 2000 XJ sport runs like crap when hot.

    Your problem is that the injector rail is becoming heat soaked due to the radiant heat coming from the exhaust manifold. The fuel inside the injector rail and injectors vaporizes and the...
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    Re: Coolant level sensor

    A coolant level sensor in the expansion reservoir is only going to help you if you have a very slow coolant leak. When the engine cools down and the coolant level in the radiator drops, it'll draw...
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    Re: Black or body colored grille?

    I think the grille looks better painted in the same red body color but it's a matter of personal taste. If you were the Rolling Stones you'd paint it black: :D
    ...
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    Re: 0280155784 injectors

    These are the flow ratings for the most popular Bosch injectors used in Jeeps and their uses:

    Bosch 0280155712 19.4lb/hr @ 43.5psi - Stock replacements in Renix 4.0 XJs

    Bosch 0280155703...
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    Re: 01 xj oil catch can

    I made my own catch can several years ago and plumbed it in between the pipe coming from the rear valve cover CCV grommet and the intake manifold.

    http://www.angelfire.com/my/fan/Catch_can.html
    ...
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    Re: 99 to 01 intake swap to an older xj

    There are several makes of header on the market but I'd recommend one that has a 6-into-2-into-1 pattern with a 2.5" collector. An exhaust shop can fabricate a 2.5" mandrel-bent downpipe for you....
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    Re: 99 to 01 intake swap to an older xj

    That guy had also changed the injectors before the "after" dyno test so the baseline dyno might have been lower than it should have been due to bad injectors. A claimed 15hp gain with just an '00+...
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    Re: Engine swap

    1. Depends on which Jeep model the '04 engine is coming from. Yes if it's from a TJ, no if it's from a WJ (different engine mount/accessory mount bosses).

    2. Your distributor will bolt directly...
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    Re: 92 xj cuts out

    A fuel delivery problem (e.g. clogged fuel filter, failing fuel pump) usually makes the engine splutter before it stalls but a failing fuel pump can also cause a sudden jerking when the engine cuts...
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    Re: Weak Brakes

    Have you checked the thickness of the brake pads at all four wheels? Pads that are worn to the limit could cause the symptoms you've described.
    Air in the system can also cause a spongy pedal with...
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    Re: Odd fuel/throttle issue

    A bad throttle position sensor will cause a fluctuating idle and some hesitation when changing throttle position, but the engine should still be able to start and drive reasonably well.
    Your Jeep...
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    Re: 99 to 01 intake swap to an older xj

    Sorry to take so long to reply but I've had a busy week at work and I've been coming home too late to get photos.
    I did an '01 XJ intake manifold swap into my '92 XJ nearly 7 years ago and I also...
  25. Re: Need help with minor coolant leak and temp gauge

    1. The spot of coolant could be coming either from the joint between the lower radiator hose and the radiator, or from the radiator itself. With the engine idling and up to temp. so that the cooling...
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