Working on a Dodge today

Discussion in 'Trucks and Trailers' started by Gravel Rat, Mar 30, 2010.

  1. Gravel Rat

    Gravel Rat LawnSite Fanatic
    Posts: 9,544

    My brother brought over his Dodge Cummins 12 valve for some maintenance the engine oil had about 30,000kms (22,000 miles) on it :dizzy:

    I don't think Dino oil is supposed to be run that long good thing it is Delo 400. It is not my truck so it is up to him to get the oil changed I keep telling my brother bring the truck over. He has been busy and I work full time.

    The 12 valve engines are worse than a 2 stroke detroit for leaks everything is bleeding oil. I tried finding a air leak in the fuel system I couldn't find it the return line system is all tight the other fittings are tight. My brother revs the engine past 2000 rpm for any length of time it loads up with air and stalls the motor out so he has to bleed the air out. It happens when he is traveling down he highway it starts missing and stalls. It is a bosch inline pump not the s****y rotary pump. Our cousin is a licensed HD mechanic he can't find where the air leak(s) are coming from.

    Today I tightened up what ever I could to try stop the oil leaks the back rocker cover boxes are bleeding everywhere. The road draft tube is pouring black oil everywhere. The front of the truck will never get rusty from the 12 valve bleeding oil out.

    I'am lost on why it is loading up on air in the fuel maybe it is time for a injection pump. The truck has 280,000kms (174,000 miles) it has had the lift pump changed around 230,000kms (143,000 miles) that wasn't cheap the Dodge dealer charged my brother 350 dollars for the pump and 250 dollars to install it.

    My brother is hoping to get another year out of the truck and get rid of it the transmission is about to go the engine doesn't like to start when its cold. The engine is reaching its lifespan many 12 valve engines around here crap out at 300,000kms (187,000 miles).
  2. WH401

    WH401 LawnSite Senior Member
    Posts: 572

    And you post this why? With maintenance and an owner like that no wonder it's got problems. Even a glorious Ford, :)rolleyes:), would have problems in that situation.
  3. Moto52

    Moto52 LawnSite Member
    Posts: 154

    hmmmm 30,000km oil change intervals and your always talking like diesel engines are only good for 200k... i think i see now why you can't get a long life out of them... a farmer friend of mine has a 1989 dodge with the 12v cummins and it has almost a million kms on the engine? is he the luckiest guy in north america??
  4. Gravel Rat

    Gravel Rat LawnSite Fanatic
    Posts: 9,544

    If my brother didn't still owe money on his truck he would have dumped it a long time ago. The thing has been a money pit he isn't looking forward to replacing the transmission. He said he will have it paid off in a 3 months and it will be heading for the auction. Nobody can figure out why the passenger side steer tire burns off he isn't the only one everybody with the 94-97 Dodge Cummins trucks have the same problem.

    We are a Ford familly my dad and grandpa has been using Ford trucks for decades. Couple weeks ago dad was looking at a friends 09 Dodge Cummins he said the thing was a cheap POS. He couldn't beleive how cheap the interior is and how thin the sheet metal is on a Dodge.

    With my brothers truck I have been telling him to get the oil changed in his truck but he was working 12 hour days 6 days a week he had no time.

    The oil didn't look that bad when I drained it today the filter wasn't heavy either. Alteast it has 10.5 litres of new Delo 400 and a fleet guard filter.

    I do the maintenance on my own truck the engine oil is changed every 5000 kilometers (3000 miles) I may run it a little longer. Truck does weigh 9800lbs empty and is traveling on 10% grades daily. In my mind oil is cheap ya it costs me 130 dollars for a pail of synthetic oil but it makes the 6.0 happy.

    I was told the 12 valve Cummins are leakers and it is a loosing battle trying to keep the oil leaks sealed. Cummins never did design the engines for the long haul build them cheap and sell them.
  5. 360ci

    360ci LawnSite Senior Member
    Posts: 992

    Diesels require frequent oil changes, that's the problem right there:

    Car, 5 quarts = 5000kms or so on cheap oil
    Diesel, 15quarts = 15000kms or so on cheap oil
    8V92, 40 quarts = 40,000kms or so on GOOD 15W40

    A good consensus is to drive 1000kms per quart. Going over that is up to the operator, especially if the truck gets worked regularly, he should be changing it sooner. Synthetic oils can go longer, but even so without a bypass filtering unit installed, it's best to stick with OEM changes as the oil will break down faster.

    I know THREE 12V owners who have had no major problems with their engines in well over 500-820,000kms. One does leak some oil but nothing drastic that it requires a top up between oil changes. Oil seals only leak when the oil becomes ineffective at around 20-25,000kms, as it gets too dirty to do it's job without adding a second filter, or by pass unit.

    As for 2 stroke Detroits, they might leak (my 8V92) but at least they had an oil catch can so you can reuse most of the oil. If the engine stalls over 2000rpm, the engine has some serious problems, more than likely all due to his lack of maintenance.

    I'd bet that the transmission that's about to die in his truck, has never been serviced, or perhaps it had once in the last 280K. Should be serviced every year if he works it hard, maybe every 2-3 years for personal driving at the most.
  6. KTM

    KTM LawnSite Senior Member
    Posts: 492

    Your brother still owes money on a 12 valve with 174,000 miles? Then spreads out the oil changes 20k miles. You guys don't sound to smart.
  7. gtmorgan89

    gtmorgan89 LawnSite Senior Member
    from East TN
    Posts: 318

    I used to know my way around 12v's pretty well. Any stock auto tranny in any dodge is thin ice. Sounds like he paid a fair price for that lift pump, given it was from a dealer. He has a good chance of replacing the injector pump in the near future as well. A FASS fuel system is a great investment. I have had the FASS on 2 24v's as a precautionary measure. The first one is up to 350,000 miles and counting.
  8. Gravel Rat

    Gravel Rat LawnSite Fanatic
    Posts: 9,544

    He paid 21,000 for the truck and has owned the truck for 4 years now it was a stretched out loan so the payments were cheaper. He bought the truck when he first started his business. The truck had about 180,000kms (112,000 miles) and my brother is the second owner of the truck. Truck belonged to a old retired guy it wasn't driven hard for most of its life and seen nothing but dealer servicing till my brother bought it.

    In the 4 years my brother has had to put in 2 sets of ball joints, replace front axle shafts, it needs new axle U joints again. I checked the transmission fluid it is good not burn't but the transmission is starting to go.
  9. zak406

    zak406 LawnSite Bronze Member
    Posts: 1,519

    Sounds like he is a little rough on the goods...
  10. Gravel Rat

    Gravel Rat LawnSite Fanatic
    Posts: 9,544

    There is a guy in the area with the same vintage truck as my brothers a 12 valve with the bosch pump. Turbo seals blew started pressurizing the oiling system and blew out a bunch of seals and filled up one of the cylinders and hydrolocked the engine. The engine had 270,000 something kilometers
    (168,000 miles) on it the guy put a rebuilt into the truck for a cool 11 grand.
    yep he got sucked in a rebuilt drop in 12 valve is 9 grand.

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