Cat engine compressor leak?

[shewolf]

We had the truck in at Freightliner a couple weeks ago for an overhead and to find an oil leak. Ended up having to replace a line to the compressor that was leaking oil.

Same day we picked up the truck from the shop noticed a strange sound coming from under the hood, sounds like air escaping at high pressure (like from a balloon) when you step down on the throttle. Cant hear anything at an idle or revving the engine sitting still, only when engine is under load.

Hubby has checked the obvious such as lines to the compressor and turbo and the clamps and tightened them up with no change.

Havent had a chance to get it back to a Freightliner yet but the small shop that is doing wheel seal, brakes and tires for us today said it sounds like could be a bearing in the turbo going out.

Any thoughts or suggestions? Im sure the boss would like to avoid another trip to Freightliner if possible after the overhead and oil leak repair. The damage on that was almost $1100, almost $400+ to steam clean the engine, test drive and replace a $26 line. :yikes:

[Capt._Chaos]

Shewolf, I need to make this suggestion to you:

Read this thread:

http://www.truckstopusa.com/forums/viewtopic.php?t=661

I would NEVER trust Freightliner,or any of the independent shops (with very few exceptions) to do ANY engine work. I have seen too many cases of mis-diagnosed problems that end up costing the truck owners huge amounts of wasted money!

If the bearing in the turbo is indeed going out, get it fixed NOW before you end up having to replace the air-to-air intercooler due to bits & pieces of the impeller fins being stuck in it.

[shewolf]

Thanks for the tip, Capt., will keep that in mind when choosing a shop in the future for engine work.

If the bearing in the turbo is indeed going out, get it fixed NOW before you end up having to replace the air-to-air intercooler due to bits & pieces of the impeller fins being stuck in it.

Yeah, sounds like a plan. We stopped at Freightliner today to get the AC fixed and have the batteries checked and thought we might have them check this problem also but owner didnt want to have it diagnosed right now. Says seems like last time he had an overhead done it caused a change in the turbo sound. :wacko:

Never heard a turbo sound like this one before and neither has Hubby in the past 5 yrs but its not our dime and our part is done. Just run it now until something breaks. At 5 yrs old it appears the truck is falling apart now.

The owner probably got by for a time without having to do much of anything and its all catching up now since he got a driver in there that wont just keep running when something needs fixing.

Oh well, its our plan to stick with it thru the rest of this year. The owner plans on selling the truck or trading in first of next year (we already know we dont want it). Then next year we either get into a new truck for this owner, find another owner with new truck or buy our own truck.

[LSMR]

Shewolf, I need to make this suggestion to you:

Read this thread:

http://www.truckstopusa.com/forums/viewtopic.php?t=661

I would NEVER trust Freightliner,or any of the independent shops (with very few exceptions) to do ANY engine work. I have seen too many cases of mis-diagnosed problems that end up costing the truck owners huge amounts of wasted money!

If the bearing in the turbo is indeed going out, get it fixed NOW before you end up having to replace the air-to-air intercooler due to bits & pieces of the impeller fins being stuck in it.


As a small shop owner I actually suggest to my customers when they have an engine performance problem to take it to the engine mfg authorized shop.Times are changing in our industry.It is almost impossible for a small repair shop to keep up to date.Tooling,repair manuals & factory training(if you can get it) will drive you to the poor house.Cat manuals now cost between $300.00-$500.00 per engine.Cummins manuals cost $100.00 each.Software for a ProLink diagnostic tool costs up to $500.00 per engine.Special tooling don't even ask the price.
Like any other trade a few bad apples spoil the whole basket.Most uf us shop owners are honest hard working people that are struggling to keep up with the times.

[Chiefwhatdahey]

Shewolf, I need to make this suggestion to you:

Read this thread:

http://www.truckstopusa.com/forums/viewtopic.php?t=661

I would NEVER trust Freightliner,or any of the independent shops (with very few exceptions) to do ANY engine work. I have seen too many cases of mis-diagnosed problems that end up costing the truck owners huge amounts of wasted money!

If the bearing in the turbo is indeed going out, get it fixed NOW before you end up having to replace the air-to-air intercooler due to bits & pieces of the impeller fins being stuck in it.

Gosh Cap I take the Feightliner crack personally, they have extensive training programs, I went to work for them as a journeyman tech and was surprised at what I didn't know when I went through their schools.