Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 10, 2025 ...

6V92 mechanic plus...

September 28, 2021, 02:28:03 pm

Anybody know of a shop with a mechanic who can work on a Detroit 6v92 in a '94 U300 in Southern California?
 
I am losing oil (one gallon per 500 miles or so) at the back of the engine where it meets the transmission, and am told that a repair requires a lift and transmission jack. So... not only am I looking for a guy with the skills to do the job, he also needs access to the equipment.
 
We're presently in Orange County, but should be able to travel a few hundred miles to get the fix. Worst case, I'll drive where I need to.

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Re: 6V92 mechanic plus...

Reply #1 – September 28, 2021, 02:42:46 pm

Someone in your area will answer but make sure it's the seal and not a hose or fitting,clean/degrease the engine and look underneath when idling.

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Re: 6V92 mechanic plus...

Reply #2 – September 28, 2021, 02:45:49 pm

Larry if you can't find a Detroit mechanic a good transmission shop should
be able to do the job, changing the seal is not a difficult job it's getting to it
that takes all the work.

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Re: 6V92 mechanic plus...

Reply #3 – September 28, 2021, 04:15:08 pm

Look up Colton truck and RV repair, in Colton, Ca. They have worked on many Foretravels.

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Re: 6V92 mechanic plus...

Reply #4 – September 28, 2021, 05:36:42 pm

We had a good experience at Interstate Fleet Maintenance (link) when we had a problem with our Cummins ISL 400. I would give them a call. Carlos is the owner.

They are located in South Gate which is likely less than 30 miles depending on where you are in Orange County.

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Re: 6V92 mechanic plus...

Reply #5 – September 28, 2021, 08:26:49 pm

Lift the bed and make sure it's not a fitting close to the alternator. I had a hose leaking up there once. If not, try some seal expander available at any parts store. It softens and expands the seals. You will need more that for a car.

Pierce

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Re: 6V92 mechanic plus...

Reply #6 – September 28, 2021, 11:05:49 pm

Bus grease monkey has a video about similar issue.
the bus is losing 1 gallon every 200 miles.
Two mechanics diagnosed with a leaking rear main seal, needs to take the engine and transmission apart, blah blah. over three thousands dollar.

Scott clean the engine, runs the bus for a while. It turns out the oil came from the air compressor. few of the bolts are loose.

Check the video
https://youtu.be/xXWWMEaMlfI

It sounds very similar to your issue. Check the video and tight all loose bolts and nuts first before open the check book.

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