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May 22, 2017, 10:36:00 AM *
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 11 
 on: Today at 08:13:35 AM 
Started by muldoonman - Last post by Geoff
I have rebuilt more 92 Series engines than I can count.  When they get tired the first thing that goes out is the oil control rings while the compression rings are still good.  This is the 92's, the 71 Series lose their compression first.  The only time I have found broken oil rings is when the rebuilder overlapped the spring tensioner which immediately breaks the oil scraper rings when the pistons are forced into the liners.  A common mistake made by newbies.  I don't know about clyinders 5&8.  Never heard of that one.  The theory I posted earlier was that the oil rings lost their tension from 26 years of low usage.  I've never heard of them breaking if they were installed correctly.

Hopefully we will hear what the problem was when the pistons are pulled.

--Geoff

 12 
 on: Today at 07:42:19 AM 
Started by muldoonman - Last post by luvrbus
I never saw oil rings loose tension unless the engine has been run hot but have seen a bunch of 8v92 with broken oil control rings,for some unknown reason seems like numbers 5 and 8 always break.I would worry about that Geoff.
 I have taken military 8v92 that were rebuilt 30 years ago and were perfect when you fired it up after setting for years   

 13 
 on: Today at 07:34:52 AM 
Started by lvmci - Last post by Geoff
What profile?


Sent from my iPad using Tapatalk

Click on your name to see your profile and add information.  You are also being ignored by four members.

--Geoff

 14 
 on: Today at 07:32:42 AM 
Started by windtrader - Last post by lostagain
I just remembered that when I was driving for Swift, some of the trailers had an automatic inflation system for the tires to keep them inflated at the correct pressure. There is a little light on the front of the trailer drivers side you can see in the mirror that if it starts blinking, it means the system is pumping too much air because of a leak. A good alternative to TPMS I think. A lot of logging trucks have that in BC on the drives for airing down in the bush, and back up for the highway.

JC

 15 
 on: Today at 07:30:17 AM 
Started by muldoonman - Last post by Geoff
I doubt the oil rings broke.  On the 92 Series the oil rings lose their tension and pass oil into the airbox while the compression rings keep their tension and the engine still runs good.  I covered this in an earlier post.  I just hope this doesn't happen to me since I also have a low milage 92 with 20 years on the clock.

--Geoff

 16 
 on: Today at 07:21:35 AM 
Started by jav9956 - Last post by Geoff
Why can't you just take the covers off and look?

--Geoff

 17 
 on: Today at 07:17:32 AM 
Started by vmcney - Last post by Geoff
I think it meets the "Free to good home" status with a promise that it is not going to be scrapped.  The bus is restorable condition, or at least saved for part.  Even the siding would be wanted by someone.  There are two rear end ratios that I know of, but just about everything on the bus is good for parts.  Having a place to store it is a big deal.

--Geoff

 18 
 on: Today at 07:05:51 AM 
Started by jav9956 - Last post by lvmci
I don't think any of that is factory, so don't think it will be in any service manual, do you know what company the bus was sold too? That might give a hint to somebody. lvmci...

 19 
 on: Today at 06:44:49 AM 
Started by muldoonman - Last post by luvrbus
With 86,000 miles if it did break the oil control rings they can install new rings,IF it has ever gotten hot but if they see black marks on the liners and piston scaring they won't install new rings.
The friggn oil rings are the only rings you cannot inspect through the air box covers on a DD 8v92 the piston has to be removed $$$$,I think the problem is up top JMO 

 20 
 on: Today at 06:35:00 AM 
Started by muldoonman - Last post by muldoonman
 Other than overfilling by a gallon. Nothing. Told them after I got on the rode and home. They have done this twice and with me  telling them. Last time was in shop, bus was in air, and they said no pumpkin heads back here under or around bus. My fault as I should have just put 8 gallons out instead of the 3 unopened boxes of Delo 100. Don't think that would hurt just blow it out they say. Think it will keep spitting as I used the theory to let it find it's place on oil stick and it was down below the L on the stick. Might a just kept going.

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