Brown Truck Under the Knife Project - Engine

[Hybrid455]

I've got one injector that doesn't seem to have any effect on the run quality of the motor, another that doesn't have much, and when listening through a stethescope I don't think the other bank sounds very good in the valve train. So basically I can pull the whole top end of this motor apart and I wouldn't be out of line.

Run a compression test paying close attention to what the glow plugs look like on the offending cylinders and are they all on the same bank? Maybe it's something simple like a bent pushrod, broken valve spring or broken rocker arm? I hopin for you.

 

[6 Nebraska IDIs]

Here's a couple pics and vids.
Here's a pic of my brother working on it the day we first started it. It was pouring down raining, but there was only about an hour and a half or so of work to do to it before we could start it.

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Here it is when we first fired it up.

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Here's a pic of the clutch arm I rebuilt. I welded and filed down the pin until it was the correct size and then welded it back to the arm and hardened it. How do you like the bluing of the hardening process. lol

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I took a few pics of the front end tonight before I pulled the valve cover to show you guys what the front of it looks like now that its all back together. As you can see, there is no way I'm gonna fit a standard grill up there. But with the guard on the front it blends in nicely.

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And here are two videos of the truck running tonight after the fit hit the shan.

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[1320Cummins]

Not wanting to scare you but go ahead and do a compression test. Are you getting lots of white smoke?

Edit: Uh, a whole nother page started while I was reading 19!! lol

 

[6 Nebraska IDIs]

Not any white smoke at all. Check out the vids and see whatcha think. Like I said in the last post on 19 I pulled the valve cover of the offending cylinder bank and found nothing wrong. Cranked the motor over and everything functioned properly.

 

[Fishin76]

Just thinking, Maybe a problem with the machine work of the heads? You did say the guy didn't really seem to care too much.....

Just a thought.

 

[6 Nebraska IDIs]

Yea he was a bit flaky. But everyone in town says he's the best diesel machinist around. I would think if his work was crappy then no one would be going there. Like others have said before about him, no one would have been leaving anything there if he had a reputation of putting out crappy work. And his problem was the exact opposite of that, he had so much stuff there waiting to be worked on he was working on other peoples stuff when he should have been working on mine.

 

[Hybrid455]

Sorry, missed the bit about having pulled the valve cover. I think I'd still do a compression test, look at the glow plugs because they can show tell tale signs of what may be going on with color, pits etc. Before I threw away the injectors I'd pop test them and look at the pattern. Hard for me to tell anything from the video.. sorry.

 

[6 Nebraska IDIs]

Listen closely you can hear what in person sounds like a chuffing and clinking sound. But in the video you can only hear the clinking sound.
Seems like everyone thinks I blew the head gasket again. I checked ebay just for the heck of it and actually found a Rotunda compression tester for $40! The exact same gauge I was looking at in the spring and couldn't find for less than $200. So I bought it. My dad said he'd buy it for me.

 

[typ4]

Pull the injectors and see if one lost a tip.
The wrong delivery of fuel will really make some awful sound with these engines.
If anything you may have passed a piece of something and bent a valve..

I have named your truck, **** Sandwich. Not out of disrespect but because of the way it is treating you.

 

[ameristar1]

One possibility, the heads were milled a lot during the time they were in the shop, right? Could the piston to valve clearance be tight enough that contact was made, when the motor was spun up to 2500?

 

[6 Nebraska IDIs]

That is a very good question man. Anything is possible at this point.
I must say I've ran it all the way up to the governed speed though twice since i've had it running and not even the slightest sign of it being a problem. 2800rpm isn't a lot. 3800, now you're kinda asking for trouble. I dont even shift until 2200-2300.
But like I said. Anything's possible at this point.

Lol Russ, no disrespect taken. That's a better name than what I was calling it tonight, and have been off and on throughout this ****** process. And to think I was showing it off to everyone today saying how much I LOVED MY TRUCK.

 

[jhnlennon]

Man I feel for ya. I once built up a 289(my first engine project) for a mustang and I somehow got the cam timing incorrect(even though I swore I checked it twice) and bent every pushrod and destroyed the camshaft on the first crank! I ended up taking the entire motor down to check everything out. Man was I upset. I thought the entire world was over at that point. Then I put the wrong pin on for the fuel pump eccentric and that worked loose and destroyed the timing chain and cracked the timing cover! I was ready to literally smash the entire car, but my dad stepped in at the time and calmed me down and helped me get it back together. It was a learning experiance in patience. I swear that automobiles are literally filled with gremlins!! Keep at it, it will come together eventually.

 

[Hybrid455]

Pull the injectors and see if one lost a tip.
The wrong delivery of fuel will really make some awful sound with these engines.
If anything you may have passed a piece of something and bent a valve..

I have named your truck, **** Sandwich. Not out of disrespect but because of the way it is treating you.

Wouldn't it be smoking alot if it lost an injector tip? If smoke would be a result of a lost tip he says it's not smoking. If your going to run a compression test would it not be better to do that first look at the glow plugs for damage first before pulling injectors since they have to come out to do the test anyway? If it's a head gasket it will most likely involve more than one cylinder on that bank. If a valve was bent you probably would not observe a normally functioning valve train as he says he did after pulling the valve cover. If an injector tip came off a piece of it most probably hit a glow plug, run a compression test.

 

[dyoung14]

since i put that 7.3 pump on mine i pull mine to 3800 alot and when i get that 4000 rpm spring i will be pulling it to that, sorry to hear your having problem man

 

[1320Cummins]

since i put that 7.3 pump on mine i pull mine to 3800 alot and when i get that 4000 rpm spring i will be pulling it to that, sorry to hear your having problem man

I have a set of pistons and a few valves that show what 4k will do to these motors. Ill get some pics and put them in a new thread.