Service schedule for 100,000+ miles

Discussion in 'General Motoring' started by Steph, Jan 6, 2009.

  1. Steph

    Steph Guest

    My 2002 (Dodge) GC ES with 3.8L has just passed 110,000 miles.
    Does anyone have a maintenance guideline/schedule that should be
    followed with the higher miles on the engine/tranny?

    For the 3.8L engine, what is the recommended time to replace the timing
    belt/chain? If the engine has not been stressed, what would be a safe delay
    in replacing it? what other work should be rolled into the timing belt

    Any other tips for keeping this thing going another couple years?
    Steph, Jan 6, 2009
  2. Steph

    Steve Guest

    Follow the same mileage/time intervals that were recommended prior to
    100k miles.
    The 3.8 has a timing chain, not a belt. I would only replace it if some
    other service needs to be performed in that area, such as replacing a
    gasket on the timing case cover. It may develop some slack at very high
    mileage so that the valve timing isn't as stable and precise as it was
    early on, but it is very unlikely to jump time because it uses metal gears.
    Just keep taking care of it. Change the oil, coolant, and other fluids
    as you always have. Don't neglect it or put off maintenance on the
    assumption that "it won't last long enough to really need that" because
    that tends to become a self-fulfilling prophecy ;) We just retired my
    wife's Chrysler LH car with 256,000 miles on it, and I suspect whoever
    buys it will get a few more years good service out of it.
    Steve, Jan 6, 2009
  3. Steph

    Bill Putney Guest

    Steve - I don't know this engine, so I'm asking for my learning (or
    maybe to catch you in a mistake - Ha - not likely!): Is the water pump
    on that engine driven by the timing chain? I'm curious as The 2.7L
    engine in my Concorde has a timing chain (I know it's not the same
    engine) - nice, since timing chains generally last the life of the
    vehicle - EXCEPT they have the water pump driven by the chain, and of
    course water pumps do fail. (I did the timing chain, water pump, and
    oil pump about 3 months ago at 207k miles as a preventative - I was
    probably lucky the water pump lasted that long - they have been known to
    come apart and do damage (if not bearing damage from leaking coolant
    into the engine if the owner/driver was not paying attention, then
    suddenly locking up and pretty much doing catastrophic damage to the

    Anyway - I mainly just wanted to get confirmed for the OP that the water
    pump was not driven off the timing chain on that GC.
    Bill Putney, Jan 6, 2009
  4. Steph

    Steve Guest

    No, the 3.3 and 3.8 are close cousins, and they have a traditional
    belt-driven waterpump. The timing chain drive is similar to the 318 v8,
    the slant-6, the 440, smallblock Chevy, and all the other old-school
    engines- just a sprocket on the crank and one on the cam connected by a
    chain, no idlers, no tensioners, no waterpump.
    Right- its very different from both the pushrod v6 engines like the 3.3
    and 3.8 and from the other OHC v6 family (the 3.5 and 4.0 belt-timed
    SOHC engines. Its truly a one-of-one engine in the Chrysler family. Even
    the similarly oddball 4.7 v8 has a related v6 version (the 3.7).
    Not unless they've radically changed the 3.3/3.8 in ways of which I'm
    unaware. I'm sure one of the dealer techs will pipe up if I got it
    wrong. ;-)
    Steve, Jan 6, 2009
  5. Right. Not sure about your 2k2 but on the '90s 3.3/3.8 to remove the water
    pump you:
    drain the coolant

    remove the serpentine belt

    wrap the belt around the water pump pulley strap wrench style and remove the
    3 bolts holding the pulley on

    remove the 5 bolts holding the water pump to the volute cast into the timing

    The pump seals to the timing cover with a large O-ring and in my case I
    didn't even have to remove the wheel well splash shield although that
    probably would have made the job slightly easier.
    Daniel Who Wants to Know, Jan 8, 2009
  6. Steph

    Bob Shuman Guest

    Doing a water pump on the 3.3 or 3.8L is very simple, but I never removed
    the belt pulley. I simply removed the entire belt by simply de-tensioning
    the belt tensioner (15mm bolt head as I recall).

    Also, access is much, much easier through the passenger side front wheel
    well after removing the wheel and the plastic inner fender shield. My last
    comment is that at 100K+ miles, if you are replacing the pump, it is a very
    good idea to replace the serpentine belt and also consider replacing the
    tensioner and idler too if they are making any noise at all.

    Bob Shuman, Jan 8, 2009
  7. Steph

    Steph Guest

    Thanks everyone!
    I posted this in the Dodge usenet group and got nothing.

    The van just turned over 110,000 miles.
    On very cold mornings it does make a slight squeak squeak for a few
    minutes. I figure it is the serpentine tensioner. The serpentine belt is
    still in good shape - and as far as I know the water pump is still good.

    My 97 3.8L engine didn't fair so well, but other than a tranny rebuild at
    12,000 and again at 30,000 (don't ask!) and then a A/C condenser and oil
    pan replacement it has been good and strong.

    It is in desperate need of a oil change and probably could use a throttle
    body service soon as well.

    I was just trying to get an idea of what servies should be done and when.
    Steph, Jan 8, 2009
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