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Topic: 6v92 ? (Read 898 times) previous topic - next topic

6v92 ?

So I'm looking at a 94 6v92 Detroit and after Dave K. Cyclinder liner o-ring failure I have some? If we're your motor and your$$$ what would you do? At this point idk if the motor has ever been overheated, and can that code be cleared from the pro-link?

Can you buy just the o-rings and replace them, or do the associated head and other gasket costs warrant going whole hog once you open it up just to replace old o-rings?  Bluebird guys indicate that it's a couple day job to swap jugs & pistons & rods and button it back up. Haha. Spin my own wrench's. So if the cylinders don't show abnormal wear or scoring and only have 140k why break in a whole new set? Con rod bearings may benefit from being changed.

Have no idea about the lifespan of the o-rings, heck there maybe 60% of 70's DD still running on the originals. On borrowed time idk.

There maybe a half micron line between being proactive and don't fix it if ain't broken,cause any invasive operation may disturb something else. Idk

Your wisdom & thoughts would be appreciated cause you've been there done that.
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake

Re: 6v92 ?

Reply #1 –
Detroit 6V-92TA diesels are wet liner and exactly like the series 60 Detroits, and all Cummins except the 5.9s are also wet liner engines. Unless the engine has been overheated, the liner O ring seals won't likely fail. Those forum members who advocate running up grades at 220 degrees or more are asking for problems down the road. The Detroit being an electronic engine, has an advantage as the ECU stores fault codes so a prospective buyer can  retrieve them and see when and how long it was overheated. The DDEC II we have also has a overheat shut down so damaging the engine is less likely unless the irresponsible operator uses the override switch. Sure death for any engine if abused. The fault codes can be cleared by a seller if he or she knows about it.  :D

350 HP is about all the side radiator GV Foretravel will cool without extensive modifications. Our U300 is very marginal in summer on long grades. The smart owner gears down and backs off the throttle to keep the temp at no more than 200.

Liner seals have improved through the years and will tolerate higher temps before failing. Still, what you can get away with with a CAT or 5.9 Cummins B engine is not the same for a wet sleeve Detroit or Cummins.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: 6v92 ?

Reply #2 –
I wouldn't be too concerned with liner seals condition. If you were to have a seal failure it will usually only be one hole and start out minimal at that.You probably wouldn't see it until oil change time when coolant would come out first, then the oil. I definately wouldn't pull it apart just to replace them. Cooling system maintaince and correct coolant SCA levels etc. You dont need a pro link to retrieve any active codes they can be viewed by light flashes on dash.I think you need it to view inactive historical codes unless they have been cleared. There might not even be any. These engines were built to run for hundreds of thousands of miles and they do / did.
When I bought my coach paperwork said engine was replaced in 2000 ECM milage shows about 69k on it now I have put about 15k of that on myself. I am sure when engine was replaced the milage was cleared and this is the milage since rebuild. Original owner dusted the cylinders with poor service and I would assume incorrect oil. So that makes these liner seals 17 years old,.Their condition does not even enter my thought processes.They are just something that very very  rarely give you any issues and are replaced at overhaul time. Yep anything can happen at anytime but I'll deal with those issues when they occure if and when.
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: 6v92 ?

Reply #3 –
Temp gauge in my coach is wildly off in temp range. This caused me much distress and money when chasing solutions. I got a VMSpc and the ECM shows that at 220º I'm really only running 195º. Well within specs. I still get nervous when I see this on the dash but checking the VMSpc I know it's ok. I've replaced the thermosensor but that didn't fix it. Next is replacing the gauge. It still a little ways down my list at the moment.

It is a cool engine. A turbo charger, a super charger, 4 exhaust valves per cylinder, and fires every stroke! Sounds like a V12!

see ya
ken
The selected media item is not currently available.ken & dori hathaway & Big Agnes
🍺1992 U300 GrandVilla WTBI #4150 FOT FBP 2011
✨6V-92TA DDEC Parlor Coach 350HP Series 92
🏁2011 Nissan XTerra Pro-4X

Re: 6v92 ?

Reply #4 –
Quote from: kenhat –
Temp gauge in my coach is wildly off in temp range.  Next is replacing the gauge.
I had the same problem, had it tested and temp was fine. Could not stand it, put electrical tape over the dash gauge until I could get somewhere to see if it was the gauge and/or sender.  ^.^d
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: 6v92 ?

Reply #5 –
#$@&666!:(:( Supper po'd just got a call from coach owner, who last Friday told me he wanted to get the new a/c unit on before he sold it, and he would give me a call when he received it and had it on.He wouldn't take a deposit, and this morning I transferred 25k to a new account at his bank to make final transaction simple. Out of the blue a couple showed up at his ranch in westcliffe, co today and bought it, yeah right. 25k was full asking price. Livid to say the least.
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake

Re: 6v92 ?

Reply #6 –
You didn't miss out. Get a cummins. (detroits are fine, if it's a series 60 LOL).
1998 U270 34'

Re: 6v92 ?

Reply #7 –
Dang and double dang. Hate that happened to you.

Deep digging,

Carter-

Re: 6v92 ?

Reply #8 –
Bummer! Not the end of the world though. Without an inspection, it could have bulkhead issues, many other problems. I am usually very disappointed when I actually look at the coach.

Eight years ago, we paid $21,5 for our U300/36, 62,000, new tires, two new ACs but bad fridge. Needed all new batteries and had been stored outside. So, $25K might have been good for inside storage in good condition but not so good for outside, high mileage, corrosion, etc.

Bottom line is never feel bummed unless you have seen the coach. Ask for all the specs and lots of high resolution photos. Sometimes you have to leap on a plane minutes after talking to the seller. Takes some experience to read the seller as the majority of the time, they have misrepresented what they are selling. A coach with corrosion is worth NOTHING to me and should be to any wise buyer.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: 6v92 ?

Reply #9 –
Totally bummed, and disgusted with the sellers wife. Yeah I know it's a dog eat dog mentality today. Apparently I'm wearing Milk Bone underwear. Been searching for many months now. Hate the look of the unicoach. If it was warmer I would fire up the sportbike and burn off some frustration on a back roads.
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake

Re: 6v92 ?

Reply #10 –
Phred it wasn't ment to be. Be patient.The right one will come along.
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: 6v92 ?

Reply #11 –
Sent them a PC correct nasty gram for what's its worth. Good, bad or ugly the world cannot move forward on all positive comments.
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake

Re: 6v92 ?

Reply #12 –
Quote from: Old phart phred –
Sent them a PC correct nasty gram for what's its worth. Good, bad or ugly the world cannot move forward on all positive comments.
What the hell go ahead and unleash the Wrath of Phred on them! Let them truly feel the warmth of the moment!! ;)
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit
 

Re: 6v92 ?

Reply #13 –
Sorry, but everyone expects too much from their fellow man. The old saying, "count your fingers after shaking hands with a car salesman" was never more true than today. You forum members are a cut well above the crowd and a breath of fresh air compared to what lies in the bog out there.

I look forward to reading the "4 legged" posts as our furry companions are always one hundred percent faithful, honest and dependable.

Yes, I would be angry and order ten yards of cow manure delivered to their driveway.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)