Engine is TOASTED

[Scott & Heather]

I have been texting Sean and Angie today. I'm hoping he updates everyone cause he has interesting news I think.


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[luvrbus]

If he needs a in frame I know a guy that has a set of 6v92 Detroit liners and pistons huh Scott 

[IMABUSBOY]

Engine prime that worked for me!!
Danny
https://youtu.be/uZBwQ3PJ-N8

[mcilee]

You may want to talk to Al's Diesel Inc. in Cut Bank MT. They are a Detroit shop that builds generator packages that go all over the world. All have Detroit power and I always see oilfield rigs coming and going from their shop. They are almost all Detroits, most of them 2 strokes. I see quite a few later buses also. Worth a call, ask for Dave Dosch. They built a nice new shop a few years ago. 406-873-5601.

[luvrbus]

LOL I believe he left MT like a heard of turtles

[mcilee]

Should have read all the 8+ pages of posts. 

[Seangie]

So we are sitting in Spokane.  Just spent 3 hours going through the entire engine with Damien trying to figure out what's wrong with this thing. Damiens been working 2 strokes for over 17 years and I think I learned more in the last two hours than I have since I owned a bus  -

He suspects its something with air in/air out that could be the problem but really couldn't exactly say what's causing it as we were in an Albertsons parking lot and he'd have to do some bench work to pinpoint it.

Liners - Can still see the cross hatch on them
Rings - shiny, shiny and shiny.  Even the fire rings look brand new
Blower - very clean, in good shape
Aftercooler - Possibly but couldn't get to it.  He highly doubts its this but worth a look at down the line if we can't figure it out
Bypass valve - clean and working
Injectors - nothing visibly wrong with them. They look to be in good shape. Would be a lot more smoke if they were causing a problem
Turbo - good shape, spins well, no damage
Muffler - worth checking into.  Could be a problem
Air Filter - seems small for the engine (only 1250cfm) but with the 9f80 injectors it shouldn't be an issue.  If it had 9g90s..maybe but problem just started so rules that out.

Anyways -  everything is checking out.  We are going to tow the van to lake moses tonight (2hrs) and see how the bus does.  Its nice and cool so we should be fine but will watch for heat and smoke.

Thanks guys for all.  I'm out of this thread like a....well...like a herd of turtles.

-Sean

 PS - Damien's Diesel is fantastic.  Damien has a mobile repair unit in Spokane Area.  Great 2 stroke mechanic (509) 953-3480 90/hr and works fast.

Write it down.

[luvrbus]

It could be just bad fuel the old 2 strokes don't care for some of the soy sauce sold for diesel fuel today

[lostagain]

Hey Sean I was just through Spokane and overnight in Moses Lake in my Swift truck a couple nights ago. We could've had a little visit. I would've rendered a little moral support to alleviate your highway sufferance. I wish you and your family good luck with this.

JC


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[RJ]

It could be just bad fuel the old 2 strokes don't care for some of the soy sauce sold for diesel fuel today

Sean -

This thought was bubbling in the back of my mind the last couple of days, simply because I went by a station selling B20 diesel for almost 50 cents/gallon less than most of the dino diesel places.

Did you by chance fill it with B20??

Also, can you pull the muffler and run it (albeit noisily) under load for a bit and see if the power's come back?  (Don't forget you're also 1,000 ft above sea level, which will have some effect, albeit theoretically not much with a turbo.)

FWIW & HTH. . .

[easystreet]

Sean, what transmission do you have?

[Seangie]

Sean -

This thought was bubbling in the back of my mind the last couple of days, simply because I went by a station selling B20 diesel for almost 50 cents/gallon less than most of the dino diesel places.

Did you by chance fill it with B20??

Also, can you pull the muffler and run it (albeit noisily) under load for a bit and see if the power's come back?  (Don't forget you're also 1,000 ft above sea level, which will have some effect, albeit theoretically not much with a turbo.)

FWIW & HTH. . .

RJ -  Damien's pretty sure its an air issue so that's my next project.  Ill start there and see if it makes a difference.

Cliff - any reccomended additives that might help if it is indeed a bad fuel problem?


JC just missed you where sis you go off to?  We are headed west as well.

Tranny is a 740.  Rear end was serviced 12 months ago.  Drop box is fine.  If it was something in the tranny I think I'd feel it.  Im pretty sure the Previous owner had the tranny serviced (like taken apart and looked at) when he bought the bus.  I've had the tranny serviced in the last 12 months - dropped oil and filled.  It was clear, no parts or pieces and is still clean when I check it.

[luvrbus]

I wouldn't spend much money searching for air in and out I would check with who installed your turbo and make sure it has the right A/R and the right turbo for the 9F80 injectors, with 9F80 injectors it is probably a 270 hp CA engine with CA cams  

The turbo and injectors is where I would look but it is your dime I am just happy you got away from Interstate they were greasing you up   

[lostagain]

Sean I was in my Swift tractor trailer. I went to Seattle then Vancouver, Kelowna, Edmonton, and today back to Calgary for some time off. The driving is a lot harder than in the bus on a holiday. I don't know how long I will last... I would've made time for a visit. Next time.  Hope all goes well with your bus.

JC


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[tomhamrick]

Sean, So glad you now have better news. That is a tough old coach!! Hope to see you and the family on the road again!
Tom & Karen