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Old 07-29-2007, 12:07 PM   #1
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Diesel woes

My 1984 310 turbo diesel (about 175000 miles) has developed a bad habit - on startup with cold engine there is a lot of smoke and it isn't all water vapor. Useful for fogging mosquitoes but not good for oil consumption. Smoking ceases when engine is good and warm, even on hard pulls. Anybody know much about valve guide leakage on these Isuzu things? Any other suggestions? Jamie
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Old 07-29-2007, 12:16 PM   #2
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I don't have the answer, but if the mods could consolidate the three posts for this that are identical, maybe the responses won't be scattered.
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Old 07-29-2007, 01:20 PM   #3
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Sounds like valve guide seals.
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Old 07-29-2007, 08:25 PM   #4
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Symptoms you describe are consistent with a turbocharger whose oil seal is failing. It will leak oil into the engine on shutdown and then leak some more until parts expand when it warms up. My old Mercedes diesel did this also and I ran it for several years. Aside from the oil consumption and environmental concerns, it may well run fine for some time in this condition.

John
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Old 07-29-2007, 08:32 PM   #5
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Is it actually using oil ? If not it may be diesel oil burning which could be the injectors leaking after shut-down .
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Old 07-29-2007, 11:01 PM   #6
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Quote:
Originally Posted by ticki2
Is it actually using oil ? If not it may be diesel oil burning which could be the injectors leaking after shut-down .
Hi, I will place my money and bets on "ticki2"

Hi, shadejo. Was that your Mecedes that sprayed the front on my car with black oil?
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Old 07-30-2007, 03:16 AM   #7
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Yes, it is using oil. I had the injectors out and bench-tested just three months ago. The turbocharger seal an idea I hadn''t thought of yet - thanks. I hope it cuntinues to run for at leatds an other month, since we are currently in Newfoundland and have to get home. Then we'll investigate further. Thanks for your espertise. Jamie
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Old 07-30-2007, 07:14 AM   #8
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My 345 always does that on cool mornings and I am not using any oil at all. The engine is just to cold to properly burn the fuel and it will clear up as the engine warms up. On hot days it doesn't do it at all.
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Old 07-31-2007, 01:55 PM   #9
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When you get back stateside, consider getting your oil analysed before you change it. No matter how you are burning oil--as opposed to leaking it out, or just blowing it out--an oil analysis may point you to the problem(s) and save you money in the long run. Costs about $20.00.

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Old 08-03-2007, 03:55 PM   #10
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Well, I had a brainstorm - the 'crossover pipe' from turbocharger to intake manifold ought to be clean inside UNLESS the turbo oil seal is leaking. That would tell which problem I have. Test: remove the turbo boost gauge sensor nipple and stick in a long Q-tip. Result: oil! Now to find a place in southeast Newfoundland where turbochargers can be reliably repaired. BTW, This is a fabulous trip! You really really ought to plan on doing it soon!
Jamie
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Old 08-03-2007, 05:06 PM   #11
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Good luck on that. My guess is that you will have to locate a rebuilt unit. Many years ago I rebuilt irrigation engines. One winter when business was slow I rebuilt about 25 turbos. The hardest part was getting parts. It took our parts guy over a month to find someone to sell up seals and bearings. Be sure and check that the oil return from the turbo to the engine is not clogged. I have see that cause oil to leak into the intake. It had coked up. Clearing that solved the problem without replacing the turbo. Worth checking.

By the way, good detective work!

Vaughan
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Old 08-03-2007, 05:12 PM   #12
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Oh, and if you do have to change it…Stainless Steel bolts and antisieze!

Vaughan
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Old 08-07-2007, 10:20 AM   #13
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Your Isuzu is a mechanical engine-no computers here. You need to get the valves adjusted at regular intervals. I have mine done every other oil change or at 20,000 miles. It is a simple procedure and does not cost much.
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Old 08-14-2007, 04:25 PM   #14
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Well, it happened: the oil seal blew out and the thing threw oil all over the M/H, the road, and the car behind. Good news is there IS a place in Newfoundland that can rebuild an old out-of-production turbochgarger. Diesel Injection Service in St. Johns rates several gold stars in our collective book!!! They don't overcharge travelers/tourists, either!!
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Old 08-14-2007, 04:37 PM   #15
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Glad to hear it, Jamie,

I have been wondering what was happening with your turbo. Make sure they clean the drain line from the turbo back to the sump. Let us know details when the repair is done.

Vaughan
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Old 08-22-2007, 06:49 AM   #16
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Smile Job Done!

Well, the thing is done! The turbocharger was removed and rebuilt in St. John's, Newfoundlland (Viking Diesel Service aka Diesel Injecton Service, should anyone ever have the need - they're OK). Cost about $2k. BIG IMPORTANT HINT: Check your turbocharger air intake hose (between air filter and turbo). Mine was torn open and let in road grime and dust, which led to the demise of the bearing. Noticing that last winter and replacing the hose would have saved $$$.
Jamie
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Old 08-22-2007, 07:11 AM   #17
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Jamie
Im not sure what engine U have but what it sounded like to me is U dont let that engine cool before SHUT DOWN! this contributes to the seals goin out .A little egg timer on the dash will do it. 3 minute cool down beFore SHUTDOWN will cool the Turbo down enough for shutdown.
I have a 7.3 liter International Deisel in My f 350 Ford I use that techineque. Ihave driven Diesel engines for 40 yrs and never lost a turb0.
Exhaust temps can reach 1000 degress thus a HOT SHUT DOWN can distroy the seals in the turbo
Lot Of Luck to U
Roger
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Old 09-02-2007, 07:00 AM   #18
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Roger -
Thanks for the tip. I have been doing exactly that for the past fifteen years, on two different turbocharged diesel motorhomes. This problem came up after a trip to the southwest (dusty) with the intake tube wasted, anmd the inside of the turbo looked sandblasted.
Jamie
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Old 09-02-2007, 05:20 PM   #19
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Quote:
Originally Posted by jking
Roger -
Thanks for the tip. I have been doing exactly that for the past fifteen years, on two different turbocharged diesel motorhomes. This problem came up after a trip to the southwest (dusty) with the intake tube wasted, anmd the inside of the turbo looked sandblasted.
Jamie
Hi, at the Ford dealer, where I work, I have seen these sand blasted turbos; Caused by what I call "Mickey Mouse, Hong Kong, After market" air cleaners. For 5 more horse power, you get to buy a new turbo. Such a good deal.
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Old 09-02-2007, 05:59 PM   #20
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Could be worse...his cylinders could be dry-washed.

Frederic
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