Recent posts

#31

Bus Topics ( click here for quick start! ) / Re: Turbo boost has diminished...

Last post by luvrbus - October 21, 2026, 03:45:34 PM

You can check the turbo on the bus  a little pay up and down you can fell is ok but side movement is not ok,you have to check the manifold on top and bottom not just the upper.If the engine has a throttle delay leaking it will drop the boost too   

#32

Bus Topics ( click here for quick start! ) / Re: Turbo boost has diminished...

Last post by David Anderson - October 21, 2026, 01:06:33 PM

If it is a leak, there are a lot of places it could leak. It could be somewhere around the blower because the charged air inlet goes in at the side of the blower.

If there is a manifold leak would I see signs of stains near the escape  point? I would think the  escaping  exhaust would  discolor  the area at the pipe flange where it would be leaking. 

Is there a way to test the turbo charger either on the engine or off of it on a bench? I have to eliminate devices one at a time. 

#33

Bus Topics ( click here for quick start! ) / Re: Turbo boost has diminished...

Last post by luvrbus - October 21, 2026, 10:49:55 AM

Manifold gaskets blow out or the manifold cracks causes the drop you have a leak some place ,the 6v92 is usually around 20 to 25 lbs. under a good load it doesn't take much of a leak to drop the PSI boost pressure and they can be hard to trace at times, and a worn turbo can cause it very often if one has a small amount of drag on the compressor (hot) side     

#34

Bus Topics ( click here for quick start! ) / Turbo boost has diminished

Last post by David Anderson - October 21, 2026, 09:24:02 AM

My turbo boost has dropped from around 15 psi to 9psi max. I used to be able to get up to 18 psi in cold weather.
I noticed this in July when I went to Wyoming. I changed my air filter in Wyoming, and that did not help. When I got home I changed my fuel filters. I have not driven the bus until yesterday.The results are still the same. I'm only getting about 9 pounds of pressure at full throttle going 65 mph. I'm having somewhat of a struggle just to get up any small hills. I had my turbo charger rebuilt by M&D Diesel in San Antonio for $1345 in 2019. It has about 50,000 miles on it now. It has worked fine up until that trip to Wyoming. I checked for turbo leaks and have found none. I can't see any exhaust leaks around my manifold either. I have no black smoke or any smoke to speak of while driving. I can make a little black smoke with a full throttle kick down taking off from a stop light.
I'm not sure what to do next. Does anyone have any ideas?
Thanks
David

#35

Bus Topics ( click here for quick start! ) / Re: Need help rebuilding or re...

Last post by luvrbus - October 21, 2026, 08:36:51 AM

It is a long distance but WW Williams in Phoenix will work on your bus engine.That engine in H-3 is easy to remove 4 hours max and you can take it to dealer on a trailer, what is the problem did you lose the bull gear,liner problem or a overhead problem? if a liner sunk in the block which is a  common problem,buy a exchange engine ,Randy at PC Industries in Afton WY will  have a rebuilt exchange 60 series engine or American Fleet but he is in Springfield Mo. 

#36

Bus Topics ( click here for quick start! ) / Re: Need help rebuilding or re...

Last post by lovetofix - October 21, 2026, 05:03:27 AM

We have a couple options here in TN but I don't know anyone in CA. The mechanic list is back up now and the list is long for CA.
Leid Diesel in PA specializes in old Detroit engines and stock all parts, they still rebuild even the 2 strokes.

#37

Bus Topics ( click here for quick start! ) / Tow Smarter with Superior Driv...

Last post by Gary Hatt - Publisher RVConversions.com - October 20, 2026, 04:54:55 PM

This is what I use to tow my 2005 Lexus SUV and it works great.

When you travel with your RV, bus conversion, or motorhome, you shouldn't have to worry about transmission damage or complicated towing setups.

That is where Superior Driveline comes in.

Their Drive Shaft Disconnect system lets you switch from Drive Mode to Tow Mode in seconds, safely disconnecting the drivetrain so you can flat-tow without damaging the transmission. No crawling underneath. No messy disconnects. Just pull the control cable and go.

•   Protect your transmission while towing
•   Shift from drive to tow in seconds
•   No odometer mileage while towing
•   Precision-balanced driveline components
•   Trusted by driveline professionals for decades

Whether you are heading to the next rally, exploring back roads, or cruising cross-country, Superior Driveline helps make towing simple and worry-free.

Built for durability.

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Learn more at
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#38

Bus Topics ( click here for quick start! ) / Re: New Website Name

Last post by Krash - October 19, 2026, 07:21:47 PM

All members were logged out when the website and forum were moved to new domain rvconversions.com.  Once you log back in you should remain logged in until you logout or clear your browser.

#39

Bus Topics ( click here for quick start! ) / Re: New Website Name

Last post by dtcerrato - October 19, 2026, 12:19:00 PM

Same here, somehow logged out. Glad to be back!

#40

Bus Topics ( click here for quick start! ) / Re: Is anyone running Red-dyed...

Last post by dtcerrato - October 19, 2026, 12:17:49 PM

Here in Tok Alaska heating oil at the pump isn't dyed!