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Hey guys.
My mom has a 89 dodge dakota with a lower end knock.She had the engine rebuilt a few years ago.The man who built it told her to bring it back after 500miles so he could go back threw it and check everything.
Well she didn – She drove it 800miles and it started kocking and had no oil psi so she parked it. (She tryed to get back in contact with the man who rebuilt it but she could find him)
Well she parked it for 3 years. she was gona junk it but i offered her what she had in it 1800 for the rebuild.
I was gona rebuild it for my self but now im just gona rebuild it and give it to my brother for competing school.Its got a 3.9 v6.
I pulled the engine today and coulden get the torque convertor bolts off soo i pulled the engine with the torque convertor steal on the engine… When i got the motor out i was checking everything and found the torque convertor and a 1 to 1 1/2 play to it (The bolts wear lose) I literally unscrewed them by hand.
I started thinking this could have been the knocking.
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I think the problem maybe in front of my face a i did not notice it.
My bro pulled a bolt from the fender and ground the battery wire there. Doesnt the battery wire need to ground to the engine?Quoted From OnThe7ThDayFord:
I think the problem maybe in front of my face a i did not notice it.
My bro pulled a bolt from the fender and ground the battery wire there. Doesnt the battery wire need to ground to the engine?Not necessarily right from the battery. Many cars just use a ground strap from the body to the frame/body.
Honestly, on that truck, I would think the battery would ground right to the block. There will often also be a ground strap like johnz said (a smaller gauge wire) that will go to the chassis or body.
Not sure when ill get to work on it again. its been raining bad all day and is suppose to do rain all weak!!!
Do you have voltage going to the ‘S’ terminal on your starter solenoid when you turn the key to run?
Ok found the not start issue. Theres a wire that need to be grounded in the midel of the crazzy wiring harness.
Found and fixed.
Ok so we pulled all the plugs like eric said and cranked to motor to prime everything. The oil psi gague climed to the first mark on normal.We ran the plug wires (CRAZZY SPARK PLUG WIRING) We did not have the right plugs so the end that goes inside the cap we cut and pilled the installation back and just stuck the wires in. LOL Couldn’t BELIEVE THIS WORKED.
She cranked right up.
No missfiring (Will never know how thats possible)
I did hear some valve tran noise but nothing to bad. The oil pressure was half way (Never seen this high before)
I did hear some lower-in noise but nothing to bad. There is no fluid in the trans so maybe this is some of it. The headers are just setting on the head bc we did have new gaskets so maybe this is some of it to.
Its dang sure not knocking like before…
The fact we have oil pressure is a good sign.
The next few days we are gona work on getting her back together.
Does anyone know if these engine are knowen for little noises?
Thanks!!!!
Well, a freshly rebuilt engine shouldn’t have ‘little noises’. But if you can get the old girl running with just little noises, then it’s a win. Good luck bud.
Thanks beefy. Like i said looking at all the things steal not hooked up i can understand some wierd sounds. I guess we will find out soon.
Can a engine knock in the lower end with good oil psi??
Yes, an engine will knock in the bottom end if significant damage has been done to the crank bearings or journals.
Yes I believe on that truck the negative battery cable goes to the engine block but make sure everything else is hooked up correctly also as there could be another issue at play.
Yes it can make noise with good oil pressure, engine building is an EXACT science and doesn’t tolerate short cuts. You may be all right though if you don’t beat it too much but the weakest link will go first if and when it does go. Glad you got it running though thanks for posting your fix.
Ok. Got everything hooked up. Fired her up and ran her at i let her idl until she was nice and warm and everything got reoiled then i idled her up to 1500rpms for 45mins then let her idl again…. She had great oil psi 30psi at idl. No knocks or anything…..
Now for the ops when i set the TQ back in the tran I failed to add tranny fuild to her (I think she may have been dry. I add fluid (7qts) before starting her up and running her all that time. When i put her in drive she makes a wierd noise (Sounds kinda like grinding slipping sound like a clutch makes when its on its way out the door) When i kick her in gear she does this hard buck jaring the moment i put her in gear and then the sound starts.
Soo is this sound related to the TQ being emty and will i be causing tomarrow bc im pulling the trans to fill up the TQ.
I pretty sure the TQ seated (3 clicks)
I was told the motor would not mount to the trans at all if the TQ was not seated 100% And I found this to be true for the most part bc when I tryed to mount them I fought with it for almost a hour until i noticed the TQ was out to far past the housing(Soo i lifted the motor back up and reseated the trans. Then she went right together.
Well whats everyone thinking. Some one tell me i dont have to pull the motors or trans.
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