hello im new to the forum and im looking to buy a 97 dually crew cab 2wd the truck it is loaded and very clean...the guys said it used about 2 quarts of oil between oil change's...is that good ?...and he put a new fuel pump on at 105000...it has 146000 on it now...i did used the truck to pull my 30ft camper on a 300 mile trip...it seemed kind of weak on the hills but i did make it lol..i stoped for fuel and i cheaked the oil..to be on the safe side...and i see the there was..kind of like and lil bit of oil around the hose's comeing from the wastegate...if its a leak im guessing a TB master will take care of that and do away will the pump all together..and there should be a light thats comes on when u frist trun the key for the glow plugs right ?..if so it never came on the hole time i had the truck..and there was no SES light...and i didnt check any codes cuz i didnt know anything about code checking at the time...and also when i turned the truck off the eng was rough as it shuts down..is in u can feel it shakin ..is that normal??..this will not be my every day driver just a 2 truck..ill put maybe 3000 or 4000 miles ayear on it..the truck is all stock..hes asking 8000 for it think its worth it??.....all replys are welcome thanks for the help guys....

The oil you are seeing is likely breather oil being drawn from the crankcase. This is typical. TB master is only a mechanical activation device for the wastegate. and will do nothing for oil seepage.





2qts to a change is no big deal. None is better, but the 6.5 seems to do a fair job of consuming oil. Qt to 1000 miles, or Qt to 500 really doesn't matter as long as it runs and starts good...





Wait to start light should come on at key up when engine is cool/coldEdited by: Kennedy

thanks kennedy....so the glow plug light could be a relay or a fuse ?.. what about the rough shut down..u can feel the truck shake..is that normal????? thanks again

check the rubber inside your harmonic balancer for decay and play. if that thing gets loose it can cause crankshaft failure.


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Welcome,


Sounds like a good deal to me, But I would read over some of the other problems on this forum and others.

Maybe it's Texas but trucks like you described are currently going for4500-7500 all day long.

If it's bone stock expect to spend some money on an exhaust.
The stock exhaust is a piece.

i wonder if a bad harmonic balancr is the cause of the rough shut down..but no i didnt check it...thanks for the replys

Hm, mine also has a rough shotdown quite often. But I don't know what an harmonic balancer is, where I would find it and how I could check it. But I surely should take care of that before anything gets damaged ...

the pulley on the front of the crankshaft

and it is an auto trans..and i could hear lil bit of a wine in frist gear..but after its shifted out to 2 gear it was fine..is that normal?

I just hear the roar of the engine and the turbo whine.

lupey,

is it the pulley that could be damaged, or has the problem to do with the way it is mounted to the crankshaft? I've seen the picture on the older thread 'Quick harmonic balancer help needed.' and started to worry ...

Can I check it by loosening the accessory belt and try to turn/move the pulley a bit by hand? Then, if it seems to sit loose, something should be done?

Does the pulley in some way balance the crankshaft? I'm quite confused about that term, 'harmonic balancer'. Why does the engine shake at shutdown rather than while it is running in case the balancer has come out of balance?


Bristlye,

on mine, I can hear something like the oil rushing through the tranny when going down a fairly steep incline in 1st, using the engine braking. But that's not like gear-whining. I've got a bit of turbo whine, too, but that's independent from the gear in use.

yes does balance the crankshaft and from what i hear if its bad it can and will break the crank,crack the block..pretty much can cost u alot of money . if u dont catch it in time.


all i know is when i buy this truck im changing the h balancer no matter if its good or bad..but the truck idle's and runs smooth but it does have a rough shut down i wonder if it is the balancer ??

Tell me more about this ruff shutdown. None of my diesels from 1982 to current shutdown as quickly or smooth as a gas motor. So it might be normal.

well you can feel a lil shake in the seat of your pants..but its does not feel like truck is coming apart or anything lol..maybe im just use to a gaser this is my frist diesel..

from what you are saying sounds like all diesels I have been around from big trucks down to Powerstrokes


I would look everything over as everyone here has suggested but not finding nothing would be ok too

Well, I've been driving two Diesels (Nissan Laurel, had a 2.8l inline 6, no electronics) from about 1990 or '89 over a period of 7 years. My father owned two of those, my uncle at least one, afair. None of these cars had a rough shutdown ever, neither had any other Diesel I've ever seen.

The only exception was a rather old, rusty Mercedes that had broken or worn/rusted off motor mounts and was terribly shuddering anyway.

Diesels have a market share of about 40% here, thus are very common. That kind of shakey shutdown seems really unique to the/my 6.5, and it doesn't do it always. My feeling is that by catching the right moment to turn the key, I can avoid the shaking. It may be my imagination, though ...


At the importance of it, to avoid serious damage, I'd really like to hear more about that harmonic balancer. How can I tell if it's gone bad? What can/should I do if it has --- or maybe I shall do something anyway, like replacing it, just to be on the safe side.

How would I fix the H/B? Simply get a replacement pulley and put it on?
Edited by: 0lee

8cylinders, high compression, it will be quite noticeably rougher than a gasser when it comes to a halt. Check/replace balancer, engine mounts if you want, its not ever going to be smooth.

The pulley isn't the harmonic balancer. (I just went through a week of parts stores trying to tell me it is)


The pulley is bolted to the balancer with 4 bolts. Then the balancer has a larger bolt straight into the end of the crankshaft. You need a harmonic balancer puller to remove it. ($20 at sears)


When they go bad, the thin rubber ring in it starts to bulge out and loose pieces.


You will also want to check the crankshaft pulley. It has a lot more rubber in it and when it breaks loose, it can rotate back and forth about an inch and make lot of noise. (possibly also damage the crankshaft)

Hm, TDG, it varies, i. e., it's sometimes as smooth as I'd expect it to be, sometimes it's rough: Then, the engine seems to shake somewhat hard to and from left/right two or three times before it stops.

That could very well come from the motor mounts, as they don't feel as tight as if new ones usually do. But then, wouldn't it shake always, not only sometimes?

whatnot,

thank you very much for the explanation!

I've noticed a squeaking noise, as if some bird was sitting in the engine, about one or two weeks after I put a new accessory belt in. The squeaking goes away when the engine gets warm, and it doesn't come on always. It isn't as loud now as as was in the beginning, too.

Can that come from the pulley?

Could be the brand of belt, Lee, or could be the tensioner(s), and or the tensioner pulley(s) (if yours has two tensioner\pulley assy's).


Remove the belt, pull the tensioner into operating position and rock it back and forth to test for binding\squeak.


Spin the pulley, listen for bearing chatter.


Then rock each tensioner pulley radially and axially - if any play exists, replace the 2002 bearing in the steel pulley, or the plastic pulley\bearing assy.

THX, gmctd!

There's only one tensioner on it, I'll check it out.

What are the chances that the rough shut down is backpressure. If it's stock the trap is probably pretty clogged.

Just how rough is the shutdown? I would assume that the other diesels that you were comparing it to probably have less cylinders and lower compression. (and only use one battery for starting)


I would check the pulley and harmonic balancer anyway. If the rubber let go in the pulley, you will want to replace it as soon as possible. While you have the pulley off, make sure that you check that the harmonic balancer bolt it tight. (If it is ok and you don't replace it)


They are all metric bolts so you shouldn't have a problem finding wrenches over there http://www.dieselplace.com/forum/smileys/HiHi.gif.

idle back pressure, is for all practical purposes 0, if you had serious exhast back pressure problems you'd have serious overheating black smoke and low power to go with it. Even then it still wouldn't affect the shut down. Remember when you shut the engine down your valve train is still operating, engine is still compressing air to 1/21 of its original volume, and now it doesnt have another cylinder coming down on power stroke to smooth it out. unless its really severe its probably just something you've got to get used to.Edited by: Texas Diesel Guy

see thats y i said ( asking the pros) i can and will get use to it ..thanks for all the help guys..


bristyle....

My '94 had rough shutdown before the open pipe was put on.
The CAT on my truck couldn't pass daylight.
It's gone and and so is the rough shutdown.

thanks quantum..i will be puting an open pipe on mine with a guted cat..thanks again

whatnot,

just as I tried to describe, the engine sometimes shakes on shutdown as if the motor mounts were badly worn off. I noticed it from the very beginning (bought the truck used with 100kkm on it) and thought it not to be 'normal', but not knowing about the harmonic balancer, I didn't pay very much attention to it.

Other diesels indeed had less cylinders, the ones I had were 2.8l inline 6. Most others have only 4 cyl, 6 is already uncommon with those small, crappy engines they put into European cars.

But I'll check it anyway, probably next weekend, it's too important to let go of.

Exhaust is still stock, I could very well feel it being a bottleneck when towing ...


PS: Maybe it's actually backpressure that comes after calm driving from a clogged cat even at idle? I can't remember having rough shutdowns on my holiday trip with the towing at higher RPMs. The cat must have been burned free.
Edited by: 0lee