1980 Chrysler lebaron slant6 knocking help!!!

Engines, Exhaust and Fuel Systems

  1. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
    Doesnt knock at idle but knocks as soon as you hit the throttle any ideas don't mind rebuilding if I have to but I don't drive since I heard the knock. It's on YouTube as: 1980 Chrysler lebaron slant6 knocking any ideas
     
  2. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
    [​IMG]
     
  3. Oldiron440

    Oldiron440 Well-Known Member

    Messages:
    2,587
    Likes Received:
    503
    Joined:
    Apr 25, 2017
    Location:
    Iowa
    Does the thing have oil in it?
     
  4. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
    Yes first thing I checked when I heard it like that it has plenty of oil imma make a new video
     
  5. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
    Could it be the oil pump or something like that
     
  6. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
     
  7. BudW

    BudW Moderator Staff Member

    Messages:
    4,115
    Likes Received:
    1075
    Joined:
    Mar 4, 2012
    Location:
    Oklahoma City
    Any chance it might have driven through some water and sucked some water into intake? I know there was a ton of water in your area a short time ago.

    Also, the video in post #2. It looks like a spark plug wire might be disconnected?
    BudW
     
  8. AJ/FormS

    AJ/FormS Well-Known Member

    Messages:
    1,089
    Likes Received:
    238
    Joined:
    Apr 26, 2016
    Location:
    On the Circle of the earth, Southern Man,Canada
    Oh-Oh; I've heard that a time or three and it was never good. One of my slantys put a broken rod right out the side shortly after and became a 5-cylinder.
     
  9. BudW

    BudW Moderator Staff Member

    Messages:
    4,115
    Likes Received:
    1075
    Joined:
    Mar 4, 2012
    Location:
    Oklahoma City
    I remember a /6 car came into the shop a long time ago. It was making a weird noise and customer said car will hardly move. The engine was running when it drove in. The tech assigned got car pulled into the stall, barely, and turned it off. Now when you hit the starter, you can here the starter turning but engine wasn’t moving.
    The crankshaft broke between last main bearing journal and flywheel. When running, there was just enough friction to turn the back half of crank/flywheel. But not the other way around.
    This doesn’t help the OP any, though.

    I will re-ask my question:
    BudW
     
  10. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
    Yes drained 2 gallons of water but never cranked it just drained put oil it was water in the trans also. I'm pretty sure it was in Harvey I got it after and drained in February and didn't get it running till 3months ago was driving perfect till the trans was not wanting to go but then I had to rev it a little then the knock came but I'm rebuilding it with another block and keep this ass backup but the camshaft has good lobs but it deteriorated on the side a little rigged will I need a new cam
     
  11. BudW

    BudW Moderator Staff Member

    Messages:
    4,115
    Likes Received:
    1075
    Joined:
    Mar 4, 2012
    Location:
    Oklahoma City
    Water doesn’t compress.
    IF you had water in combustion chamber (not saying you did), and if engine was either running or cranking, it will bend and/or break things.
    The /6 has a long connecting rod and I’ve seen a few bent (from water) over the years. The knock noise is from the bent rod hitting the block – which can damage the block if not tended to. In many cases, tossing in a new cod (and bearings) fixes you right up.


    I’ve worked on a lot of flood cars over the years. If the cars are not started, changing the fluids, making sure anything electrical is dry and carpet cleaned well, you can get a car to last a good while longer. If it was started, attempted to start or running at the time, getting the water/fluid (or oil) cleaned out is both gross and time consuming (especially automatic transmissions).

    On engines, the first thing I check is the air filter.
    If the paper element is wet/damp, then some flood water has gone through the intake system and often means other damage. If the filter is dry, then this is generally not a problem (in most cases).

    Most cars on the marketplace, ’76 and newer, has the air intake down at bumper level or lower. That would be ’77-89 (all) FMJ’s. Most (if not all) ’76 F’s didn’t use outside air.
    Been my experience that when many people (not you, just speaking in general) drive through high water, the water slows down the car, so most people will apply the gas (sometimes a lot of gas) to keep the car moving. Sense the engine is a (big) air pump and sense engine intake is at bumper level (or lower), it will suck the water right up like a Shop Vac hose stuck in a full bathtub. Once car is turned off, the water in air cleaner/ductwork will drain out leaving the air filter wet. Air filters do not get wet even on rainy days because there is enough air flow to keep it dry.
     
    MotorHoggGears likes this.
  12. Davesmopar

    Davesmopar Well-Known Member

    Messages:
    184
    Likes Received:
    18
    Joined:
    Sep 1, 2019
    Location:
    Hendersonville, Tn
    That my friend is internal parts of the engine trying to become external parts of the engine......

    Okay flood waters aside, and water in the engine aside,, was it running before it started making the noise okay, another words water would cause immediate damage, I'm just trying to find out if after the water incident if you drove the thing for a while before it started knocking???

    Of course if you didn't get all the water out of the engine it can wash the bearings down causing them to deteriorate prematurely and cause failure........

    But you can pull one plug wire off at a time and see if it lessons or almost goes away and that will tell you what cylinder it is and if it's a rod......


    Btw I am adding to what BudW said not instead of it...
     
    MotorHoggGears likes this.
  13. AJ/FormS

    AJ/FormS Well-Known Member

    Messages:
    1,089
    Likes Received:
    238
    Joined:
    Apr 26, 2016
    Location:
    On the Circle of the earth, Southern Man,Canada
    That's how the factory cams are, wavy edges, seen it on 318s and 360s as well. Doesn't seem to matter as long as the lobes are good and NO lifters are worn concave; a concave lifter points to a worn out lobe.
     
    MotorHoggGears likes this.
  14. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
    There was water in every thing imma upload how the trans looked pretty nasty stuff but I think In all it should be good. The /6 is very affordable to rebuild back to stock so I'm ok I'm just glad I can give it a chance at the road.
     
  15. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
    Ok so it suppose to be that way I can post pics of the camshaft or another video
     
  16. AJ/FormS

    AJ/FormS Well-Known Member

    Messages:
    1,089
    Likes Received:
    238
    Joined:
    Apr 26, 2016
    Location:
    On the Circle of the earth, Southern Man,Canada
    Can't hurt to get more opinions
     
  17. BudW

    BudW Moderator Staff Member

    Messages:
    4,115
    Likes Received:
    1075
    Joined:
    Mar 4, 2012
    Location:
    Oklahoma City
    On Chrysler automatic transmission that gets flooded: If engine was not cranked or started, then the ATF and water doesn’t mix. When you drop the pan (or plug, if you are lucky enough to have a drain plug), it will come out ½ as dirty water and ½ as red ATF. If it was cranked or started, then the water and ATF mixes into a gross foamy pink slop that is hard to clean out.

    If not mixed, you can get a can of spray cleaner and give it a good soaking, put in a new filter, adjust the bands (ALWAYS CHECK AND ADJUST BANDS ANYTIME PAN IS OFF!) and you are good. What little water remaining will boil out in a short time.

    If you are looking at a gross pink foamy slop, then it will take a while to get all of that #$^% cleaned out. The best thing to do is to perform a transmission overhaul and flush out the converter and lines. If you don’t, you WILL experience transmission failure in a short time, and this time you will have hard part damage (a "pay me now or pay me later" scenario).

    Engine oil and water don’t mix or won’t stay mixed. The bad news is oil is lighter than water so water will be at the bottom of oil pan. When started, the water is what is “lubricating” the bearings and oil might not ever get sucked into the oil pump. Water does not nor will not keep a bearing lubricated so you get into serious bearing damage really quick. It is worse for an engine to use water (in place of oil) than not having any oil left in engine (in my opinion). Also, it seems like the oil in water does cause a lot of “soft sludge” to form inside of engine. It is not hard to get it all cleaned out (using sludge cleaners) but when it “slops” out of the drain hole it looks like and sounds like barf. Not recommended to do if you are already feeling somewhat whoosy.

    Don’t forget the differential. It is not as bad to do – but water will cause bearing failure in no time flat.

    It takes very deep water to damage the brakes or the P/S system.
    BudW
     
  18. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
    Just getting to taking the engine out and apart this upcoming month wish me well will upload pics and let you know the status on Harvey the eagle.
     
  19. SixBanger

    SixBanger Well-Known Member

    Messages:
    339
    Likes Received:
    51
    Joined:
    Jul 31, 2018
    Location:
    The Netherlands
    Good to hear that you start working on the engine. Good luck! Other deep water damage to do other than engine?
     
    MotorHoggGears likes this.
  20. MotorHoggGears

    MotorHoggGears Well-Known Member

    Messages:
    52
    Likes Received:
    5
    Joined:
    Jul 16, 2019
    Location:
    Houston,tx
    Engine/ trans and differential I'm going through one project at a time back to back it's going to be on youtube Houstonia Tv subscribe cause after I rebuild everything
    I'm going 5.7 hemi swap and I have a lot of information on it