Help Support Ram Forum by donating:


  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

'05 3.7L Overheated & Seized - What to do next?

Discussion in 'Engine & Performance' started by MayerMR, Sep 14, 2020.

Sponsored By: Moe's Performance
  1. Fishstickz

    Fishstickz Senior Member

    Posts:
    392
    Likes Received:
    201
    Joined:
    Jul 20, 2017
    Location:
    Oklahoma
    Ram Year:
    2006
    Engine:
    3.7
    Lol the RLE isn't a bad transmission by any means, I've drove lots of vehicles and my RLE is still one of the smoothest in terms of shifting. I don't think the 3.7 or the RLE ever belonged in a truck though lol

    Just curious, why not go for a Hemi? There was a guy who posted a thread of swapping his '03 3.7 to a Hemi, so it can technically be done. It'd be more expensive and time consuming, but the Hemi has A LOT more going for it than the 3.7s and 4.7s.
     
  2. LoneWolf3574

    LoneWolf3574 Senior Member Military

    Age:
    46
    Posts:
    243
    Likes Received:
    110
    Joined:
    Apr 23, 2018
    Location:
    Arizona
    Ram Year:
    2006
    Engine:
    Hemi 5.7
    Think nothing of it brother, my younger brother is a retired crayon eater as well he just owns a Fnord ;P. Getting a "Military" banner is as easy as posting to the following forum and add some of your particulars (ie Branch, Job, Years, etc) because we vets like to know something about our brothers and sisters. :)

    https://www.ramforum.com/threads/military-roll-call.121627/page-77

    EDIT - Doh, forgot the link and can't spell worth squat today.
     
  3. MayerMR

    MayerMR Junior Member Military

    Age:
    35
    Posts:
    19
    Likes Received:
    4
    Joined:
    Sep 12, 2020
    Location:
    Richardson, TX
    Ram Year:
    2005 & 2014
    Engine:
    3.7 & 3.0 EcoDiesel
    Well, to be perfectly frank, because I don't want to go to all the trouble and cost as this is just a winter project truck for fun that I will more than likely end up selling after I get it fixed and running again. The only reason I'm entertaining doing anything other than exchanging the 3.7 or rebuilding the 3.7 is because the cost difference is so minimal. And if I'm being honest, some of it is the sentimentality that it is how the truck I had in high school and college was configured.

    So, also, kind of good news...though you all may call me crazy...I have found, about two hours away from me, a guy selling a 4.7L w/engine harness and ECU for $500. It's also got brand new heads (still shiny & fresh looking), new water pump, and some other new bits and bobs. That's the good news. The bad news is that he took it out and replaced it with a 5.7L Hemi (he said he had to buy a wrecked parts truck and change all kinds of things over) because after he had the oil changed it "gave out" about a week later. He said it will turn over, but it "didn't sound too happy". I had planned to tear into whatever engine I ended up getting anyway, so I'm thinking that for $500, this one might be worth the risk. I'll likely be doing a rebuild anyway, so assuming it's not a catastrophic mechanical failure...I might be money ahead...though I could also be money disastrously behind too. I dunno, you all think I'm a fool for pursuing this one?

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  4. MayerMR

    MayerMR Junior Member Military

    Age:
    35
    Posts:
    19
    Likes Received:
    4
    Joined:
    Sep 12, 2020
    Location:
    Richardson, TX
    Ram Year:
    2005 & 2014
    Engine:
    3.7 & 3.0 EcoDiesel
    A Ford, huh? Well, hell, I guess it's true that sometimes even we Marines make mistakes... ;)

    And thanks for the link - I'll post my particulars in there!
     
    LoneWolf3574 likes this.
  5. HemiLonestar

    HemiLonestar Senior Member Military

    Age:
    47
    Posts:
    4,422
    Likes Received:
    1,785
    Joined:
    Jun 1, 2012
    Location:
    MD
    Ram Year:
    2003
    Engine:
    5.7 hemi
    Your last post didn't have a link at all lol, that's why I provided one
     
    BadHemi2014 likes this.
  6. MayerMR

    MayerMR Junior Member Military

    Age:
    35
    Posts:
    19
    Likes Received:
    4
    Joined:
    Sep 12, 2020
    Location:
    Richardson, TX
    Ram Year:
    2005 & 2014
    Engine:
    3.7 & 3.0 EcoDiesel
    Anyone care to tell me if I'm an idiot for going after that engine that "didn't sound happy"? I'm still thinking the new heads and other components may be worth the risk? Hopefully it's something as simple as a timing chain skipping a tooth or three...
     
  7. MayerMR

    MayerMR Junior Member Military

    Age:
    35
    Posts:
    19
    Likes Received:
    4
    Joined:
    Sep 12, 2020
    Location:
    Richardson, TX
    Ram Year:
    2005 & 2014
    Engine:
    3.7 & 3.0 EcoDiesel
    Well, small update; I went out today and did finally have a chance to confirm that the engine is, indeed, completely seized. I wasn't able to see any evidence of external damage, though my search was admittedly pretty cursory. I threw a battery in it and the mileage is only about 183k - not low, but I was thinking it was going to be much higher.
     
  8. MayerMR

    MayerMR Junior Member Military

    Age:
    35
    Posts:
    19
    Likes Received:
    4
    Joined:
    Sep 12, 2020
    Location:
    Richardson, TX
    Ram Year:
    2005 & 2014
    Engine:
    3.7 & 3.0 EcoDiesel
    well gents, since no one told me I was a big ole dummy for looking at that 4.7L engine I posted about last week, I went ahead and went out and bought it. Good news and bad news.

    Bad news:
    -The dummy left it in the back of his truck with the intake manifold off and the ports uncovered during last week's rain storms, so there was a bunch of water, complete with mosquito larvae swimming around in it. I could look down into the intake and see water pooling.

    Good news:
    -I told the guy that with all the water in the engine that I'd have to do an immediate teardown to clean the water out and even doing that I'm running a huge risk with having other significant issues in the engine...so I knocked him down another $200.

    We dipped the engine over and drained out most of the water and loaded it into my truck.

    Aside from the questionable engine, I also got the 4.7 ECM, another radiator, fan shroud, two sets of motor mounts, oil cooler, air box, alternator, etc. etc. Basically everything in the engine bay since he changed over to a hemi.

    My buddy went along with me to pick up the engine and once we got back to the house, we started to prep the engine and got it on the engine stand. After that we went ahead and drained the oil...well, we got to the oil eventually, after about, no kidding, probably a gallon of water. That said, luckily, the water and oil was completely separated. As in, the water was clear and the oil was black.

    [​IMG]

    We then got started on the post mortem. Let's just say it didn't take long.

    Oooh, pretty, clean new re-manned head...everything looks pretty normal on this side...

    [​IMG]

    Well, a different story on the driver's side. This doesn't look good...

    [​IMG]

    Ah, yes, just as I suspected, ole girl had a timing chain problem...tensioner failure, to be exact.

    [​IMG]

    A lot more light through there than what you should be seeing...

    [​IMG]

    Let's go deeper....Yup, there's yer problem dere Jim...

    [​IMG]

    [​IMG]

    After we finished the post mortem, we turned the engine over and removed the oil pan, windage tray, and oil pick-up (yes, the pick was sludgy, but not blocked. I went ahead and sprayed everything I could see with WD-40 to get the water out (though it looked like the water just slid down the oil-coated internals and straight into the pan. I also removed all the spark plugs and we drained the water out of the cylinders and, where present and sprayed WD-40 down in there.

    This was pretty much the end of the day, so that's all the further I got today.
     
    Last edited: Sep 19, 2020
  9. MayerMR

    MayerMR Junior Member Military

    Age:
    35
    Posts:
    19
    Likes Received:
    4
    Joined:
    Sep 12, 2020
    Location:
    Richardson, TX
    Ram Year:
    2005 & 2014
    Engine:
    3.7 & 3.0 EcoDiesel
    So here's what I'm thinking, and I'd love y'all's input - but as the timing chain jumped and there were at least three rockers that were just loose in there, I'm thinking I have *at least* three bent valves in the driver's side head.

    Tomorrow I'm going to go out and remove the timing chain set and rotate the cam and see if I get free play (and full closure) on all the intake valves - which I doubt. If I don't, I'm going pull the exhaust manifold and check the same for the exhaust valves. My assumption is that I'm going to be pulling this head. With any luck, I *might* be able to avoid having to take it to City Motor Supply for reworking, but that'll depend on how bad the valves got whacked, and what else I find once the head is off.

    Current new parts list:
    • Timing chain/tensioner set
    • Gasket set
    • Windage tray/oil pan gasket set
    • Spark plugs
    • Belt tensioner pulley(s)
    • Thermostat housing (cracked)
    • Oil pick-up tube o-ring (if not in the gasket set?)
    Parts I'm most likely going to need:
    • Some new valves
    • New head bolts
    • Bunch of crap I can't even fathom just yet...

    Anyway, if anyone else sees anything I missed, please let me know!
     
  10. MayerMR

    MayerMR Junior Member Military

    Age:
    35
    Posts:
    19
    Likes Received:
    4
    Joined:
    Sep 12, 2020
    Location:
    Richardson, TX
    Ram Year:
    2005 & 2014
    Engine:
    3.7 & 3.0 EcoDiesel
    Well I spent Sunday doing further diagnosis and teardown. All four exhaust valves on the driver's side cylinder bank are bent. So as I suspected, the head had to come off. After removing the head and seeing that I wasn't able to get all the water out, as I had hoped, and seeing what it was/had done to the cylinder walls, I decided to pull both heads to clean the cylinders out as best as I could.

    [​IMG]

    Unfortunately, the water had already done it's thing. So, hoping the best, we decided to further tear it down and remove the piston and crank to see if it could be honed out and to inspect the bearings (I mean, we're already this far, right?) Rod bearings looked really good. As did most of the crank bearings, but two in the rear had a little bit of pitting. Cylinders, where not rusted and lightly stained/marginally pitted, were glazed. Nearly every piston had at least some of the rings completely stuck in the grooves. I imagine this engine was quite the smoker.

    Pictured below after a very light honing, before this the cylinders (where not rusted) looked like a glossy sheen of fresh clearcoat.
    [​IMG]

    It was getting long on into the day by this point - we did do some preliminary honing, but I'm stilling thinking that I'm going to take this block to CMS and having them hot tank it and get their assessment on the cylinders. I have to take the driver's side head in anyway to get them to replace the valve guides and valves anyway.

    [​IMG]

    Also, does anyone know where I get order a new oil pan that *doesn't* have paint on the inside? Or should I just take the OEM one down and get sandblasted? I'm not putting this damn thing back together with an oil pan that has a painted interior...
     

Share This Page