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Discussion Starter · #1 ·
First of all, good to be here, i dont post too often, but there is a wealth of good information here.. and now i need some help.. please....


So my dads 05 CR had a miss about two weeks ago today...

I left work to check out the issue with him more in depth, and first thing was first, the truck was throwing a P602 code (ecm programming error), and no other codes. The truck was also about a gallon low on oil, which really concerned me.. A gallon of oil was added and truck was driven home.. Under the light we could not see any oil out of the blowby tube, nor the oil dipstick tube, BUT we could see that there was what appeared to be "blowby" coming out of the oil filler hole.. now this was blowby because if you put your hand over the hole, it would want to lift it off, and the cap in the hole would literally fly off when you put it on there.. Oh crap... was the first thing I thought.. the second thing, was that there might be a broken ring in that motor...


In the morning, we turned on the truck, no oil spewing out of the blowby tube, and truck started up just fine... it just had a "tick" to it (which I mistook for a knock at first sound) and we got it over the shop.. truck was smoking white the entire ride over there, and seemed to be "shaky" at idle.. I don't know, my dad was driving his truck (which is the one with the issues) and I was behind him in my 05. the truck was smoking a little white.. and seemed to be "ticking" from under the valve cover.... when we got to the shop. Right away the truck was taken into diagnostics, and as per the snap on computer, injector number four was not functioning properly.. as a matter of fact.. DEAD cylinder.. truck was on 5 cylinders, and was "running ok" by what it seemed. Anyways, on topic, injector four was shot.. IF one is out, may as well do all six.. so we proceeded to do all six..

EVEN WITH 2 micron filtration, I learned now that injectors still wear out, and at 148K miles, 80K with two micron filtration, one injector was dead. The injectors were tested on a bench, and injector four was not working properly, and according to the tester, it had been weakening very rapidly for some time before it gave out.

after the replacing all six injectors, connector tubes, and getting squared away.. the ECM still was not recognizing injector 4.. so the truck was running on five injectors.. again.. Turns out we had to remove the stock programming to try to remove code P602, and even after removal.. the ecm still was not recognizing the injector.. The ECM was reflashed and the truck smoothed out and worked much better than what it did before..

Ok so injectors, tubes, ECM reflash.. stock tune back on the truck, and NO DTC codes later.. truck seems to be running well.. WE changed the oil on it, used Delo 400, and Baldwin filtration, and also did the 2 micron from GDP, and proceeded to do a valve adjustment on the truck...

after the valves were set to specs, we happened to notice a couple of things on the truck.. the first one being that when you start it, it kind of sounds like it "drags" a little or "grinds, almost like it forcefully turns the motor for a little bit and the truck fires right up... it has done this the past four starts..

secondly, just for kicks, I wound up pulling off the oil cap, and guess what.. sounded like air escaping from the crankcase, and upon laying the cap on the oil filler hole, there was that damn blowby once again. .less than before when it first went bad.. but still.. good lord!!! there was no oil spewing out of the blowby tube, but when you pull the oil dipstick out, there is some oil specs spewing out of there.. and there appears to be some oil on the front differential as well, but its not bellowing it out of the bottom like crazy...

does anyone have a clue what in the world is wrong with my motor? Did a ring really break on this thing? or does the cylinder that was "dead" have anything to do with it?

again.. truck starts and runs great for being stock, other than that hiccup when starting it, and the blowby that still has not gone away...

I am not opposed to a rebuild if I need it, but im seeking out other possibilities for why I have blowby again, when ive seemingly done new injectors, new crankcase filter, ecm reflash, no DTCs and valve adjustment..

thank you in advance for your help guys!

Rick
 

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Do a comperssion test to see where the cylinders are, easiest thing to do before tearing into it. Sounds like it may have hurt a piston or rings. While you are doing the compression test scoping the cylinder might tell you more.
 

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Rick, you've been in the game long enough to know that that much blow by means something is hurt internally. Best case scenario, valve seals are shot. Worst case scenario, sleeve a cylinder.
 

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Discussion Starter · #4 ·
compression test, valve recheck, are next on the list...

im fearing that this motor needs a rebuild though.. ill post as I learn more...
 

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Discussion Starter · #5 ·
to all wondering.. and those who followed this thread..

heads been pulled off.. piston number six looks like it has been hit with a hammer repeatedly, and has some serious play in it.. its in the process of getting pulled out as well as the rest of the pistons.. but a sleeve job is already needed for number six at least.. now to see what happened to the rings... im willing to be its what caused the play in the piston and the hammering on the top...

thanks!
 

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to all wondering.. and those who followed this thread..

heads been pulled off.. piston number six looks like it has been hit with a hammer repeatedly, and has some serious play in it.. its in the process of getting pulled out as well as the rest of the pistons.. but a sleeve job is already needed for number six at least.. now to see what happened to the rings... im willing to be its what caused the play in the piston and the hammering on the top...

thanks!
Where are the impacts? Around the edge of the piston? Around the bowl, or all over? Post a pic.
 
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Ditto, pictures please. This sounds interesting enough to preserve.
 
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The best filtration in the world will not totally prevent these high tech German designed injectors from wearing out.
Much of the problem is with the low quality garbage ULSD diesel being foisted upon the American diesel buyer. Very low lubricity.
Like running water in the crankcase instead of oil.

Lubricity

Add a lubricity improver, 100% commercial biodiesel is the best on the market for lubricity improvement and injector component wear reduction. Also the lowest cost.
Put in 1 gal. per tank full.

"EVEN WITH 2 micron filtration, I learned now that injectors still wear out, and at 148K miles, 80K with two micron filtration, one injector was dead."

Good luck with the engine, expensive lesson in garbage diesel.
 

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Discussion Starter · #10 ·
The best filtration in the world will not totally prevent these high tech German designed injectors from wearing out.
Much of the problem is with the low quality garbage ULSD diesel being foisted upon the American diesel buyer. Very low lubricity.
Like running water in the crankcase instead of oil.

Lubricity

Add a lubricity improver, 100% commercial biodiesel is the best on the market for lubricity improvement and injector component wear reduction. Also the lowest cost.
Put in 1 gal. per tank full.

"EVEN WITH 2 micron filtration, I learned now that injectors still wear out, and at 148K miles, 80K with two micron filtration, one injector was dead."

Good luck with the engine, expensive lesson in garbage diesel.
thank you sir!

ive learned a lot about these trucks by reading your posts.. for that I say thanks
 

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Pictures of the carnage.





 

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Discussion Starter · #12 ·
trucks back on the road already..

what a difference now is all ive got to say.. Head was overhauled, all six cylinders were sleeved (why do just two right?) block was machined, head was decked, crank was machined, truck runs better now than it did when it was acquired.. no blowby whatsoever, and total cost was 4500 dollars...
 
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