Do I need an overhaul?
01-14-2020, (Subject: Do I need an overhaul? ) 
Post: #1
Do I need an overhaul?
My truck runs at 40 psi oil pressure pretty much all the time. It doesn't burn any oil that I know of but it does leak some. We've discussed me needing major work on here but I really wanna try and pinpoint how much longer I can go. Also it doesn't run very hot and it think that really helps the oil pressure stay up at 38-40. Usually it runs 160-190 with the occasional spike at 210 loaded and pulling. At a full 210 at the end of OCI it drops to 34-38 psi but on a fresh change it's always 38-40. I do have a fair bit of blowby but the truck runs really well. 1.2 million miles with no overhaul that I'm aware of but I've always wondered if maybe it was inframed before we got it. Everyone here says I should just stay on top of maintenance instead of trying to trade it for something else. I really wanna get as much insight as I can here and see what the next step is. The biggest question I have is should I be afraid of engine failure where I am? As always I'm here to learn.
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01-14-2020, (Subject: Do I need an overhaul? ) 
Post: #2
RE: Do I need an overhaul?
What you need to know is if the blow by is actual blowby or something else? Take your oil cap off, do you see blowby chuffing out there? You could have a shop do a proper blowby test.

I thought my motor was needing a rebuild but it turned out my new reman cummins turbo was boosting into my crankcase.

My local cummins just told me the 871 had a bad run of reman turbos where they would have to check every one before install because so many were bad.


User's Signature: I'm no mechanic, I'm just a guy that breaks down enough to know a bit.
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01-14-2020, (Subject: Do I need an overhaul? ) 
Post: #3
RE: Do I need an overhaul?
I do get blowby out of the tube but not pressurized blowby. Mine is an 870 that's been beyond good to me. I want to do an inframe I'm just waiting to get a little more cash flow here. I really just wanna make it through the next few months so I can overhaul it.
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01-14-2020, (Subject: Do I need an overhaul? ) 
Post: #4
RE: Do I need an overhaul?
Perhap's a gallon of supertech 80w90 gear oil would help reduce the blowby, it certainly helped on mine.


User's Signature: It's hard to win an argument with a smart person, but it's damn near impossible to win an argument with a stupid person
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01-14-2020, (Subject: Do I need an overhaul? ) 
Post: #5
RE: Do I need an overhaul?
1.2m miles you could have a wrist pin go in the next mile or 200,000 miles your playing with fire and it may or may not burn you. What I can say is that engine has given 1.2m miles in most likely Savagely hot/cold seasons

say it averaged $2 per mile gross that engine has earned $2.4m dollars it deserves a nice vacation and a $15-35k hip and knee replacements depending if you do the work or a good shop. It deserves 1-3% of what it's earned


User's Signature: 2010 Lonestar - CM871 - 13sp - 3.70s, 2016 T680 - cm2350 - 13sp - 3.36s - skateboarder
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 Thanks given by: Waterloo , tree98 , Pd6cas2
01-14-2020, (Subject: Do I need an overhaul? ) 
Post: #6
RE: Do I need an overhaul?
If you want that truck to go another million miles + just save up enough and get it to one of the shops that’s recommended on this forum.

All the shops that come recommended also come with something very important. Honesty! You will be told up front of any mistakes made or w.e and! They won’t sell you short so you have to redo the motor 2-3 times!.

When I did my inframe at the shi#t shop, I figured I could patch it up for 10k and get back to making money. Big fucking NOOP! After being on this forum I realized one thing. I was wrong about everything!. I’m not going anywhere!

You can slap bandages on it and pray to the all mighty day and night lol but it won’t save you from doing it over again. That’s if you even decide to keep the truck afterwords.


User's Signature: The creator said " Help your self and I will help you; Protect your self and I will protect you "
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 Thanks given by: tree98 , Waterloo
01-15-2020, (Subject: Do I need an overhaul? ) 
Post: #7
RE: Do I need an overhaul?
(01-14-2020 )Evotrucker Wrote:  If you want that truck to go another million miles + just save up enough and get it to one of the shops that’s recommended on this forum.

All the shops that come recommended also come with something very important. Honesty! You will be told up front of any mistakes made or w.e and! They won’t sell you short so you have to redo the motor 2-3 times!.

When I did my inframe at the shi#t shop, I figured I could patch it up for 10k and get back to making money. Big fucking NOOP! After being on this forum I realized one thing. I was wrong about everything!. I’m not going anywhere!

You can slap bandages on it and pray to the all mighty day and night lol but it won’t save you from doing it over again. That’s if you even decide to keep the truck afterwords.

Same here, I did not listen to the guys here, cost me $38,000! When the head blew at 70,000 miles on the first in frame, (Licensed and certified Cummins shop), Rawze called and told me to get my rear end to his house, we in framed it in his driveway. Discovered all sorts of screw ups, including the wrong parts installed in the motor, injectors, liners, pistons, cams, everything...

We are not just talking out our rear ends here, most of us learnt the hard way. Don't be a victim.

If one of those wrist pins fails, you will blow a hole through the side of the block. Don't mess with it, you are living on borrowed time.
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01-15-2020, (Subject: Do I need an overhaul? ) 
Post: #8
RE: Do I need an overhaul?
If it hasn't been overhauled and I believe you said in your other post that the main bearings haven't been done, then you are absolutely driving a truck that will out of no where scatter the engine. It happened to my CM870 at 1.1 million with 15,000 lbs on the deck coasting down a slight hill. It started atop slightly knock and before I could get it pulled over to see what was happening, it sounded like someone threw gravel in the cylinders. I scattered cylinder #5. I was fortunate that it didn't blow a hole out the side of the block. So I was able to get the core value on the engine swap.
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 Thanks given by: Pd6cas2
01-15-2020, (Subject: Do I need an overhaul? ) 
Post: #9
RE: Do I need an overhaul?
(01-14-2020 )Izzyrod52 Wrote:  My truck runs at 40 psi oil pressure pretty much all the time. It doesn't burn any oil that I know of but it does leak some. We've discussed me needing major work on here but I really wanna try and pinpoint how much longer I can go. Also it doesn't run very hot and it think that really helps the oil pressure stay up at 38-40. Usually it runs 160-190 with the occasional spike at 210 loaded and pulling. At a full 210 at the end of OCI it drops to 34-38 psi but on a fresh change it's always 38-40. I do have a fair bit of blowby but the truck runs really well. 1.2 million miles with no overhaul that I'm aware of but I've always wondered if maybe it was inframed before we got it. Everyone here says I should just stay on top of maintenance instead of trying to trade it for something else. I really wanna get as much insight as I can here and see what the next step is. The biggest question I have is should I be afraid of engine failure where I am? As always I'm here to learn.

"just a few more miles .... just a few more miles ,... just a few more .. it isn't burning any oil,,... runs smooth as a button,.. no vibration,.. sounds and runs great...I baby it along and I will just go another few months and save my cash up so that i can get an inframe done right and have saved up some money ... it just runs so good and I baby it , so I can't see it just suddenly failing like you guys talk about ... Like how bad really is it?"


THE famous set of words...

You were warned.. Maybe you get lucky, ... but most don't.

At 1.2 million miles, no inframe, and no one doing the rod/main bearings back when it only had 800k on it,... your odds of making it another 6 months to a year are lower than going to the casino with $30,000 and blowing it on the roulette wheel.

-- i very well remember one lady that was at Mr. Hags one day (about 2 years ago),.. her 870 purred like a kitten, and had right at 1.2 million miles on it too ... I said same thing to her... she said .. ok, Sound like good advice, I will have it done in next few months, i have always babied my truck and never driven it hard... had this thing for many years and know it has been very well cared for ... ....

--she made it out west, middle of nowhere, about 4 weeks later and a piston went straight through the block, zero warning whatsoever. <- put her out of buisness ... she did not have the money for a recon engine.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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 Thanks given by: Pd6cas2





  
  
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