Mitsubishi Eclipse Forum : “is it common for the eclipse to have a knocking noise in the motor and how do u ...”
is it common for the eclipse to have a knocking noise in the motor and how do u fix it
No a knocking noise is never common in the motor, it's usually a sign of very bad things...
I haven't dealt with an eclipse motor yet, so hopefully someone with more knowledge on the subject will post with a more specific answer.
Most common knock I can think of is a rod knock which can be cause by one of three things...
1- rod bearings are worn out
2- Bolts are coming loose at the rod journal
3- Damage to the rod
Other things it could be are problems with a valve train, the belt systems ect... Anything off balance and badly held in place can knock potentially it's hard to tell what it is without hearing it in person.
Checking the rod problems though is fairly easy on 'most' cars(I can't insure this is how you do it on yours.
Basic steps are as follows.
First lift the car, If you have manual put it in 5th and leave the drive wheels free to turn.
1-Drain oil
2- Remove oil pan
3- Get access to bottom of of the crankshaft(dunno what this involves in your car some it's right there in front of you others you gotta move oil pickups, others still there is a lower block assembly that needs removeal which is usually a pain)
4- Inspect the where the rods connect to the crankshaft. You shouldn't be able to move them up and down in relation to the crank. If you can that's likely the source of the knock.
If they are moving I recommend replace all the bearings while your there(usually not that expensive) and make sure you torque the bolts down properly. A repair manual will have the details which you should pick up before doing this to make sure it's possible on this car.
Hope that helps
Remember before replacing the oil pan to clean the inside of varnish and the mating surfaces of all debris. If it uses a gasket eliminator, such as ATV black, make sure you let it cure a bit(5-10mins or until tacky) before bolting it on. This prevents leaks and keeps the RTV from being dissolved in the oil which can lead to problems down the road.
As I said I haven't done this on your car before so ask on an eclipse club forum if no one else here answers the question for you.
Also remember to fill the oil before starting after the procedure. :-D
do you know for sure its the motor? if you have a stick try pushing in the clutch and listen for that same knocking sound, if you cant hear it afterwards then its your clutch, i just dropped a act stage two 6 puck in my 01 and it just started knocking most likely uneven wear on the clutch... or it what the othe guy said and is a rod if so STOP DRIVING IT until you get it fixed, i know way to many people that have said f it and and push it... or you dont have enough oil in it, or the fuel injector are going bad but thats more of a ticking sound either way find out whats wrong with it... sorry to give ya bad news but try to have a nice day
i got a 420A eclipse and if you're running the same thing as me, the engine's solid. (Chrysler designed/built engine by the way) only major problem is crankwalking. i havent had any trouble with knocking noises yet so i havent looked into the problem much
Typically the 420a and the 4g63 have what most people refer to as "ticking" which is actually the lifters. Very normal for these vehicles, but if you are saying it sounds like a knock. Typical thing is the rod bearings. When driving the knocking should increase with rpm. Also its funny to hear some people knock on mitsubishi, etc. When the 4g63 is actually voted the strongest and most powerful four cylinder motor. The motor in this persons car is the 420a and was designed by the chrysler corporation. It was commonly used in the dodge neon, plymouth neon. Don't talk about what you dont know.