Is there any smoke when you first start it? what is happening is the valve seals are probably worn and letting the oil seep past them. when your engine is first started it has no oil or very little oil at the top of the engine, thus causing the knocking noise. could be more but this is a most likely . oh and is you haven't changed your oil every 3,000 miles you had beeter start doing it....
knocking sounds usually come from bottom of engine try a better quality and correct viscosity oil
does it stop after warming up? could be faulity engine lifters. lpaws45.
lpaws45 is pretty accurate for most engines with a genuine engine knock. But on a Mitsubishi Endeavor, my guess is you aren't using premium (91 octane) fuel 100% of the time as recommended by Mitsubishi. This creates carbon build-up on top of the pistons which in turn creates a knocking sound very similar to a lower-end engine knock. This knock will eventually occur at all times, hot or cold. The cure is to have an engine decarbon procedure performed (having a professional run a solvent through the intake vacuum) and start using premium fuel. The added fuel mileage from using premium with a 3.8 liter Mitsubishi V6 will more than pay for the extra cost.
can you elaborate? engine noise? stationary/moving? ticking, tapping or a definite knocking?
A bad rod bearing
Running too lean.
Having a bad rod bearing could cause a truck to make a loud knocking noise and shake when driving at high speeds. The engine having a coolant leak or an engine timing problem could also cause the knocking noise.
A hole in the muffler would cause a knocking sound in your muffler. A loose exhaust pipe can also cause a knocking noise.
maybe the carberator i dont know im not a machanic or anything
I would recommend taking it to a mechanic and have them listen to it. Everyone's definition of "knocking" is slightly different. Try not to drive it for too long; engine knocks can usually cause pretty severe damage to an engine.
it might be a bent piton rod if you or water or somthing into the engine
Its ur lifters I have the.same.prob one of.ur.valves isn't getting that much oil
Most likely is knocking. Try next higher octane grade of gasoline.
Low oil or low oil pressure, bad oil pump, clogged or gummed up lifters or even thin oil can cause low oil pressure. All the possibilities mentioned can cause the engine to be starved of lubrication. Which in turn creates friction that heats the metal engine part so that their tolerances change. Change in tolerances between two parts can cause knocking with increased heat from this friction.
Engine rod? Engine bearing?
if the engine is knocking you could have bad support bushings for the mouter mounts or your engine could be warped do to excessive heat wear
Connecting rods that are bent. Either way, you are looking probably at an engine rebuild at best, possibly and more likely an engine replacement.
Squeaky brakes, sticky lifters engine knocking . Please be a little more specific.
if it sounds like the knocking is coming from the bottom of the engine i would bet it was the rods or rod bearings may be worn. if the knocking is on the top ,then i would have the lifters and or the rocker arms checked.
Year, make, model, engine and a detailed description of which pulley locked up would help us help you.
you may have a rod knocking and you need to take it to a shop asap
Not sure what your asking exactly. But I will tell you this about knocking in Montanas. I have seen a few of them that will start sucking oil into the combustion chamber through a leaking intake manifold gasket. The motor goes dry enough to cause a knocking on the lower end of the engine. End of motor! Check your oil!!!
An engine knock ia almost always very serious. Stop drivng this car and take it to a professional. Not a repair for a novice.
the cause of this is probably a bad u joint
If its a legitimate knocking then you would want to go with head gasket if its a tapping you would be looking at a valve
it's probably a rod knocking
Typically not enough oil. Bad spark plugs or the wrong grade of gasoline or a bad O2 sensor can also contribute.