Join Date: Mar 2004
Location: Slave Lake, Alberta, Canada
Feedback Score: 0 reviews
Re: What does the Turbo sound like just before it fails?
There's enough different ways that a turbo can fail that there isn't one particular sound that will announce it's passing... I had one, a long time ago that the owner stated that he thought the transmission was going out... a horrendous scraping noise any time the turbine changed speed. Other failures will make no noise at all....
Everything starts with what happens at the service desk.... How the customer explains the concern - how the service writer interprets it and writes it on the contact sheet... Word of advice at this point.... The contact sheet should contain enough info for the tech to either reproduce the concern or decide if he is going to undertake any particular diagnostic steps (can you smell the disclaimer coming?), if any at all.
If they performed the boost test that I think they did, the engine never exceeds 1200 rpm. This is a pretty good test since it checks VGT operation and other factors but it isn't the be-all, end-all test. Depending on the information I am given on the RO (which, in our store, at least, will have the contact sheet stapled to it - the RO is a pretty terse description of hwat might be on the contact sheet), I might choose to remove the intake ducting and inspect the impeller for signs of damage and check the shaft for "wall slap"... I might choose to road test the truck to see if I could reproduce the symptoms as described.... I might choose to monitor real world boost pressures during the road test... But I do have to be lead there, to a certain degree, by what I have for a description. I need that <something>... be it in description or what I can recreate in a road test...
And here comes the disclaimer.... This is how I would handle it... This is how my guys would handle it... I can't road test everything that leaves our shop, but these guys have never, ever heard me say "that's good enough" - it's either good - or it isn't.
Unfortunately, and this subject is discussed regularly on another venue, not every shop or every tech shares these values or high standards. And the reasons can be many.... inadequate techs is a big one. These engine management systems are complex and, as FordDoctor so eloquently states, they do separate the men from the boys. And I'm not trying to say that I'm anything special.... I spend a lot of time thinking very hard about the data I have.... logic drives every decision. I digress... Inadequate techs... techs that are faced with DPs that don't offer what training Ford supplies - or production numbers that are unrealistic - or wage packages that reward speed over customer satisfaction... and a lot of situations I can't even imagine.
I apologize for the length of this reply and I apologize that it wandered so much off topic... but there is one last comment....
When you sign the contact sheet... read what the service advisor has written... remember that the tech knows nothing of the situation and needs to know the key factors... and if what he/she has written isn't what you said, don't sign it. This contact sheet is the single most important document in the paper trail that will come from this repair (from a customer satisfaction standpoint).
Thanks for reading...