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Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

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  #1  
Old 09-12-2009
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jcs707 jcs707 is offline
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Default 6v92 Silver : what is high mileage

I'm seriously considering purchasing a 83 PT38 / 6v92 Silver w/160K. Question, is 160K high mileage for a 'properly' maintained 6v92? I've seen write-ups and comments that suggest that they're done at 250K and others say they're just getting broken in at 200K.

/Clint

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  #2  
Old 09-12-2009
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Randy Dupree Randy Dupree is offline
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Clint,before we talk too much about the 6V92s you will need to fill out your signature.

160K miles on a 92 series engine does not bother me at all.
as long as you keep them cool and full of oil you will be fine,just like any other engine,gas or diesel.
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  #3  
Old 09-12-2009
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Understood, ... I think I'm good to go with the sig now ... sorry about that.


/Clint
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  #4  
Old 09-13-2009
fxdwg fxdwg is offline
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Clint,

That was one of the things that turned me off of an 8v92 motored coach. The vast majority listed engine work in the selling listing. Most do NOT get the proper maintenance and are not kept cool. Once overheated, you're in for repairs. The 6v is the same beast. IF (and that's a HUGE "if") you could find one that's been maintained, I think they would be a great motor. Too many of them out there for them not to have been a great motor.
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  #5  
Old 09-13-2009
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Default 6V92 high mileage

To my knowledge, all Detroit diesel bus engines prior to the series 60 were two cycle engines. They require a low ash oil such as Delo 100 rather than Delo 400. Many unknowledgeable owners used Delo 400 or a high ash oil not realizing the differnce.

If these engines are properly maintained and properly operated (do not lug a two cycle engine) they can go 400,000 to 500,000 miles without problems. Most 6v92 or 8v92 with low mileage engine work was do to improper maintenance or operation.

That's my two cents worth.
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  #6  
Old 09-13-2009
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Ernest Ekberg Ernest Ekberg is offline
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83 PT 40- 300,000 miles and if I had money for fuel I'd be in that baby now. Motels are the pits.
Ernie- currently at Brain Eberhards' in Fallbrook, Ca,
going to work on flooring his Millenium edition Lx
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  #7  
Old 09-13-2009
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Default Detroit high mileage

As an aside to the main thread here and this may part of what the original posting was referring to, The FC Bluebirds had a Cat 3208 engine which was a V8 engine without sleeves and was considered in the industry as a throwaway engine. It was a GOOD engine but it needed the mains and rod bearings replaced around 100,000 miles. With this work, it was considered good for around 250,000 miles.

The Detroit 2 cycles were 400,000 mile plus engines IF OPERATED PROPERLY. I have seen many go over 400,000 miles in logging truck service which is much tougher than highway mileage.

My three cents.
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  #8  
Old 09-14-2009
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even well maintained 92 series engines can fail due to overheating.

We have talked about this on the site many times,theres a water line that impossible to see that goes bad and when it does your engine will overheat.
We have changed that hose on a dozen well maintained coachs and the owner was not even aware that he had a time bomb on his hands.
any engine can overheat,and we need to keep that in mind.
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  #9  
Old 09-14-2009
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Default 6v-92

Quote:
Originally Posted by Randy Dupree View Post
even well maintained 92 series engines can fail due to overheating.

We have talked about this on the site many times,theres a water line that impossible to see that goes bad and when it does your engine will overheat.
We have changed that hose on a dozen well maintained coachs and the owner was not even aware that he had a time bomb on his hands.
any engine can overheat,and we need to keep that in mind.
My 6v-92 has 230K+ right now. When I bought it I knew that all 2 cycle detroits require 40 wt detroit diesel rated oil. Not multi-weight 15w40. I had a mechanic friend that is no longer with us that insisted most two strokes didn't die they were murdered by wrong oil or overheating.

Mine had coolant in the oil when I bought it. I recommend an oil analysis on whatever you are looking for. Aaron W ( a forum member ) and I pulled the heads off as advised by a Detroit dealer in Gary Indiana. The head gasket o-rings were shot. The most important thing the dealer stated was the rod and main bearings had to be changed as 2-strokes like this at all.

Well the head gaskets weren't the only issue. The injector base o-rings were just as bad as the head gasket o-rings and I still had a coolant leak. Soooo to make a long story short; Aaron W and I pulled it down again and put on new heads that I scored with new bearings again.

Everything is great with it now. I love my 6V!
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  #10  
Old 09-14-2009
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Randy

Where is the water line that goes bad?
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