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Marty "Ghozt"

Guess What I'm doing this weekend?

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2005 5.9 24 valve. Making oil... Yuk. I guess most of you know what that means. It is also knocking on injector 5 and 6.

 

At least it is going to be a beautiful day down here in Texas. Already in the 70's. 

Will update when I'm all done. 

Oh, and this is my first post, great site from what I've seen so far.

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Edited by Marty "Ghozt"

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Thanks for the Topic move, just sent a message to Mopar and asked him to do it, I was in too big of a hurry to get all greasy I guess.

 

It seems that the injector body on #6 is cracked. Not a pretty sight, will get some pics after I get cleaned up.

Edited by Marty "Ghozt"

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You got a bore scope? I would not be installing the new injectors until I did a visual inspection of the piston and bore.

Edited by Wild and Free

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Slim did a Compression test, his thoughts exactly, everything seems cool to him. He is the mechanic, LOL Not me. He says they look really good. Whatever that means. Told him if it was all bad, we would crate an engine in from Dallas and just drop it in.

So far, so good.

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Need some help with this if anyone can...

Stupid BD Diesel sent injectors without the nozzle washers. Got a shop here in town that probably has them, but I need the original Cummins part number for the injectors. Been searching for the last hour looking for that stupid number. This is vital to my business. If I don't have the truck in Galveston Monday night, I lose a HUGE contract.

 

Help please.

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2 hours ago, Marty "Ghozt" said:

Need some help with this if anyone can...

Stupid BD Diesel sent injectors without the nozzle washers. Got a shop here in town that probably has them, but I need the original Cummins part number for the injectors. Been searching for the last hour looking for that stupid number. This is vital to my business. If I don't have the truck in Galveston Monday night, I lose a HUGE contract.

 

Help please.

Here is what I found. 05086895aa http://www.factorychryslerparts.com/products/SEAL-Fuel-Injector/4376630/05086895AA.html You might want to double check me on this.

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Copper Crush Washers.  Finally got the parts at about 7:30 pm last night. We won't discuss what that cost me on a Saturday night.

Premier Truck Center in Amarillo really stepped up to the plate on this one. They primarily serve big rigs, but hey, that is essentially what this thing is, an 18 wheeler with only four wheels. 

Does 300 psi sound about right for compression? It is uniform on all cylinders so I assumed it was correct. Guess that is pretty darned good for an engine with 270,000 miles on it.

Edited by Marty "Ghozt"

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Numbers for compression never really bother me, more so % to each other, ie if psi was at 200 but all cylinders were within 5% of each other I wouldn't worry. (Obviously provided that it idled and ran good)

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So, 300 psi doesn't throw up any red flags? 2005 5.9 24v 270,000 miles... Thought about tearing into the 2006 5.9 1 ton to confirm compression, but that just seems a little stupid to me.

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I don't know what they are supposed to be at, but who know what they did when teating, was it a hot engine / cold etc etc, so I mostly look at % to each other.

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That's the problem there is not set number for compression on these engines. More or less as long as it not excessive blow by and ejecting oil out the vent tube then it should be fine.

Me personally... I would most likely tear it down and rebuild the engine. I look toward efficiency and reliability of the engine more than max performance and power. Again there is no set number saying you must rebuilt at...

I'm curious pull your intake tube and shoot a picture of the turbo face. I'm curious of the S&B if the engine didn't take on some dusting. I'm not a fan of washable filters...

Edited by Mopar1973Man
  • Like 1

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Sounds really low. How bad is the blowby? 

99.99% of the time they are not all going to be "exactly" the same. I think you need to talk to the mechanic and have him do it in front of you.

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Life of diesel engines and fuel system components in pretty much every industry except general personal automotive is measured in total gallons of fuel burned.

Compression testing is always most accurate on a hot engine and as stated above consistancy across the board is more important than an actual set # unless you are dealing with 2 strokes.

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25 minutes ago, Wild and Free said:

Life of diesel engines and fuel system components in pretty much every industry except general personal automotive is measured in total gallons of fuel burned.

Compression testing is always most accurate on a hot engine and as stated above consistancy across the board is more important than an actual set # unless you are dealing with 2 strokes.

I highly doubt his engine was hot, considering the body of the injector was cracked. If he drove it there that wasn't a good idea either....

If he had said 350psi I could live with that. But being 100psi down across the board isn't good. To me that would mean either something wasn't sealed when testing or the truck would have quite a bit of blowby.

  • Like 1

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How close are the numbers to each other?

 

I would be very surprised if all where reading nearly the same amount low.  Much more likely testing was done in a manner that causes them to read low.

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All injectors have been installed, engine was cold during both testings. last one 30 minutes ago.

just a little over 300 psi all 6 cylinders, very little deviation. Like less than 20 psi. 

Cyl. 1 322

Cyl. 2 314

Cyl. 3 318

Cyl. 4 310

Cyl. 5 305

Cyl. 6 302

All measurements are estimates of course with this cheap tester. Not the best tester in the world I am sure. Saw the testing myself.

EDIT: Test Kit is a Wilmar... He said it was pretty cheap.

Edited by Marty "Ghozt"

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Still seems really low, especially since CR motors are supposed to have more compression than the SO 24v. I way 400+ on all cyl @170K or so. 

If it doesn't have blowby though run it and don't worry :thumbup2: 

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Cracked injector bodies don't generally lead to piston failures, but they can lead to too much fuel in the oil which will damage bearings and the like. 

Injector nozzle and stuck injectors are what lead to piston issue. 

 

 

As for the compression test it should be 350 psi minimum and within 20% cylinder to cylinder, from the FSM

That being said weak batteries, weak starter, or a cold engine can effect the reading. Valve adjustment can also effect the readings. 

They are all very close so I would assume batteries are weak or the tester is off, or the starter wasn't ran long enough. 

 

 

On the most important note...do NOT run that AFE fuel filter. They are not fuel water separators and only 7um absolute, not the 3um they advertise. 

The best filter to run in the OEM housing is the Baldwin PF7977. 

 

Edited by AH64ID
  • Like 3

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That the problem. I can't link to an FSM page. :doh:  I know there is all the information everyone can want in the FSM but when you want to point some to information it's much easier to point to URL link than an FSM page...

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