[Bill]

I also used 8″. Definitely easier to double clamp.

[Archived]

Ok guys. I know this thread has been going for a while… but this picture says it all

This is the hose that Prevost Mira Loma put on the hot side intake to the CAC in feb of 2014 and it is cracking at the seem. They like Jon and others have posted here installed the High temp Red hose with rings on the cold side and used the incorrect hose at the Turbo as well.

[Archived]

Length is unimportant on a very critical topic. You will sit if one of these fail. I know it’s most important on the EGR motors, but next time I’m at Jeff’s we’re replacing blue with red on the hot side on a non-EGR bus. Geo.

[Karl]

Hi guys, I apologize for being gone so long, but it has been a coupld hectic days. I have just emailed a link to this thread to Guy French and Gaetan Bolduc and remarked as it came to my mind that this has the makings of a class action suit. Hopefully they take the time to read and respond, and perhaps fix some problems before it advances that far or someone gets hurt because of a breakdown that could have and should have been foreseen.

[Archived]

They won’t see it Karl unless they’re logged in and I doubt that will happen.

[Dick]

Cut & Paste pertinent responses into an email?

[Bill]

Tom wrote: “They won’t see it Karl unless they’re logged in and I doubt that will happen.”

Ouch. As the cliche goes … the truth can hurt.

I’ve watched this thread and thought I didn’t have a dog in this hunt until I read the George (who I believe has a non-EGR coach which should not be impacted by this painfully length debate over blue vs red hoses) is going to have his hoses changed!

I find anything beyond what should have been the first five or six posts to this thread to be completely unnecessary. Unnecessary NOT because of who posted or what they posted, but UNNECESSARY because it has become apparent Prevost owners have been completely failed by their presumably elite chassis builder.

Put yourself in the shoes of a prospective Prevost owner regardless of chassis type, regardless of new vs old, regardless of converter, regardless of 8V92 vs Series 60, regardless of length.

That prospective Prevost owner has read all the laudatory posts about the superiority of the Prevost chassis and has read how proud Prevost owners refer to other motorhomes and coaches as S&S (“sticks & staples”) and “plastic coaches” … but then read the Mother Ship in Quebec and Elgin can’t get its act together when spec’ing critical hoses that are subject to extreme heat and pressure and their failure results in the mighty Prevost coach dead on the side of the road.

Prospective Prevost owners aren’t thinking WTH … they’re thinking WTF!

This issue makes the shimmy and shake, peeling chrome mirror vendor look like a potentional component vender of the year award winner.

Maybe I don’t understand the technical issues behind the blue vs red hose problem. Maybe I’m taking a simplistic approach to this issue and its solution.

But to me, this is pretty simple:

1. There is a really hot side, and a not so hot side.

2. There are two types of hoses, different based on their ability to withstand temperature.

3. Logic tells me to the higher temp hose goes on the really hot side and the lower temp hose goes on the not so hot side.

4. Someone decided the hoses should be different colors because they have different max operating temp ranges. This concept is not new. Aviation fuel is different colors based on octane rating, thread-lock is a different color based on its holding strength, Romex wire sheathing is different based on gauge (size) of the wires. Since “red” is usually associated with “hot” and “blue” with “cold”, the “red” hose should have higher temp specs than the “blue” hose.

5. Red on the hotter side, blue on the no so hot side.

What is SO difficult about this? What is SO hard about this?

It’s time for Prevost to step up, back peddle if appropriate and get this right. The longer this goes on and persists, the more foolish Prevost looks. The more likely prospective Prevost owners will lose respect for the chassis; when that happens we will all lose. Current Prevost owners, the converters, the vendors, and Prevost.

PS: If I’ve incorrectly characterized anything about this issue or mispoke, please alert me and I’ll edit my rant or delete it as appropriate.

edited 11/20/2015 @ 5:00pm CST to strikeout “and Elgin” at Jon’s suggestion.

[Archived]

Only one nit to pick Dick with an outstanding post…………..

The folks in Elgin are not only blameless, they are helpless in this matter. As the thread has pointed out the only thing the parts guys can do is provide the part number specified. Unless they have the part in their hand they do not know if it is red or blue, and even if they have it in their hand, can see the color they cannot arbitrarily tell someone to use red or blue. They have to go by what is called for.

I won’t reveal who all I have talked to, but I can tell you they understand the issue and are helpless to do anything other than supply a part number that is ordered or specified in their parts lists.

[Archived]

Jon, I know you are on top of this with plenty of folks from Prevost and beyond. Who is it that is reluctant to get to the bottom of this and issue a recall for safety sake. Does the national transportation agency have the power to get Prevost attention? It seems someone in power is fearful of loosing a bonus. Seems sort of petty to stone wall on a relative inexpensive part. Wait until someone is hit on the side of the road, the lawyers will be all over it. That will be expensive.

[Karl]

I forgot all about this blue house. Bill’s pic above reminded me, saved in a file.

I took this picture when this hose was removed from a 2005 XL-II for defective CAC replacement.

The mileage was on or about 55,000.

Yes, Prevost blue hoses work just fine on the hot side…for a while.

[Karl]

Jon and Tom,

If they have to log in to read this thread perhaps you could fix up a temporary login to email them, or a link with a builtin login to the thread so that they don’t have to bother.

[Archived]

Various departments at Prevost have access to the forum, but they’re never used. We can provide the Prevost username and password as needed, all they have to do is contact us.

[Bernie]

Jon,

I completely agree with your comments and see that Dick has already made the change. I spent about 20 minutes on the phone with the prevost parts guys who i have talked to three – four times this week. He totally understands the situation and also genuinelly wants to help. He gave me several names and I am going to try to make some calls and see what I can do next week. It’s in all our interest and safety to get this figured out. One other tool is that a pretty large seated coach service manager saw the mistake and result first hand. So I am going to see if he will help out as well. I will post an update when I have something hopefully postive to report.

Bill

[Archived]

Here is one that we cut off however you can see the blow out plainly with oil blow out as the turbo failed also



here is another one. This is easy to miss as it is right next to the clamp usually.

[Archived]

“Jon, I know you are on top of this with plenty of folks from Prevost and beyond. Who is it that is reluctant to get to the bottom of this and issue a recall for safety sake. Does the national transportation agency have the power to get Prevost attention? It seems someone in power is fearful of loosing a bonus. Seems sort of petty to stone wall on a relative inexpensive part. Wait until someone is hit on the side of the road, the lawyers will be all over it. That will be expensive.

Larry, I am far from alone in this discussion. I started it the morning I called BA when I saw his photos that had the red on the cold side and the blue on the hot side. He posted them on this forum. He was helpless in getting the techs and managers in Nashville to reverse the positions, so I reached out to Bill Jensen who understood what I explained and he said he would ask engineering to correct what appeared to be a transposition of part numbers in the bill of material. That was perhaps 2 years ago and since then we alerted PC members and kept getting feedback to indicate there was a remaining issue.

Others such as Karl have jumped in and attempted to move up the executive ladder to make folks at Prevost understand there is a problem. As this thread reveals nobody takes we non-professionals serious. After all we are just a bunch of motor home owners.

Using lousy quality mirrors or installing crappy CACs constitutes really annoying but expensive items to repair. The CAC hoses on the other hand fall into the category of endangerment. When a hose blows in a fashion similar to those posted by Jeff with a tear around the circumference (as opposed to a split) it is generally sudden and the pressure loss is so great turbo boost is virtually non-existent. Letting a car drift to the side of a highway is pretty easy. Trying to get an underpowered or disabled coach across traffic to a safe haven on the side of the highway is not so easy. Then there is the issue of getting hit while sitting inches away from 70 MPH traffic.

Perhaps if enough of us with EGR engines with blue hoses on the hot side email or call Prevost executives something will happen. But if the past is any indicator it is going to take a lot of heat applied to the Prevost executives before they get away from their defensive mode and actually look deeply into this issue. All it takes to prove what we have been saying is to go for a ride in an EGR coach with a DDEC reader hooked up. The reader will display data that shows 500 degree turbo outlet temps along with 50 PSI boost pressures every single time the EGR functions. Then all that is necessary is to look up the specs for the hoses being called for on the hot side and they will hopefully realize we are not crying wolf.

I told Karl I have given up trying to get someone at Prevost to understand the concern. All I have gotten is a discussion to placate me.