2002 jeep grand Cherokee loredo 4.0 straight 6 makes a ticking noise at idle. If motor is revved noise is more pronounced and ticks faster with the revs.I believe that 91 octane gas lessened the noise. I use 5w-30 mobile 1 full synthetic and the thing has almost 130,000 miles on it. This ticking doesn't seem to lessen performance at all
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No special rules or tools to replace. If you get a used part you will need to get a spacing shim that sticks to the end to correctly space it to the flexplate. Otherwise a new one should just unbolt and go right back together.
Your problem is likely a bad battery and/or corrosion on the battery terminals. Remove the cables from the battery terminals and clean them with a wire brush or other tool. NOTE: always remove the negative cable first and reconnect it last. Reconnect the cables and then try to start/jump the vehicle again. If that doesn't clear the problem, take the battery to your local auto parts store or supplier and have them check it. You will probably need a new one.
Two things...when it reads zero, is there any engine noise (tapping or knocking)? After you rev the engine does the pressure read normal at idle and function normally, or does it go back down? Either way, you should not drive the vehicle 'till you have a mechanical gauge (yours is electro-mechanical) put on there and the actual pressure is tested. The condition may be a bad sending unit, a bad bearing or possible obstructed oil pump screen. The repair is obviously different for each one and the price is as well.
No it doesn't hurt anything but the environment and the smog polices feelings. Power improvements from a free flowing pipe. no additional power going bigger except for more noise which might make you think it is faster
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