Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 05-14-2014, 09:18 PM   #1
Senior Member
 
Bryan H's Avatar
 
Join Date: Jun 2012
Posts: 143
Air Dryer Question

I have a Haldex PurEST air dryer on my 2008 Winnebago (with 6.7 Cummins ISB). If I accelerate from a stop at a pretty good rate, the air dryer makes a hissing sound until the rpm level of the engine drops when the transmission shift into 4th gear. While driving with a Cummins tech for an unrelated problem, he suggested the noise was likely from a faulty turbo saver valve in the dryer unit. Has anyone had a similar issue? Other than the hissing under acceleration, the air system seems to function appropriately.
__________________

__________________
2015 Thor Outlaw 29H Class C Toyhauler
2015 Jeep Wrangler JKU Toad
Bryan H is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-14-2014, 09:46 PM   #2
Senior Member
 
Join Date: Jun 2007
Posts: 230
if it is hissing while accelerating only then I would think that you are loosing boost pressure. Possibly a air leak in the pressurized side of the intake. Check all the fittings from the turbo to the CAC and back to the intake of the engine. Spray the hoses with a soapy water solution and with the engine idling there is enough air pressure in there to show up an air leak. HTH Skip H.
__________________

__________________
sjholt is offline   Reply With Quote
Old 05-14-2014, 10:43 PM   #3
Member
 
SoIlBoy's Avatar
 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Oct 2009
Posts: 85
My 05 Journey does the same thing under harder than normal acceleration. It is coming from the air drier.
__________________
SoIlBoy is offline   Reply With Quote
Old 05-14-2014, 11:43 PM   #4
Senior Member
 
Bryan H's Avatar
 
Join Date: Jun 2012
Posts: 143
Yes, it's air dryer, not boost, related. Acceleration also runs the compressor harder. Can someone tell me what the turbo saver valve (on the dryer) actually does.
__________________
2015 Thor Outlaw 29H Class C Toyhauler
2015 Jeep Wrangler JKU Toad
Bryan H is offline   Reply With Quote
Old 05-20-2014, 09:13 PM   #5
Senior Member
 
NorthernDriv's Avatar
 
Join Date: Mar 2014
Location: Mission,B.C.
Posts: 238
Patent US5334230 - Sealed air dryer with turbosaver valve - Google Patents
__________________
HR Endeavor DST Bath and 1/2 - SOLD
Me and the DW
NorthernDriv is offline   Reply With Quote
Old 05-20-2014, 11:23 PM   #6
Senior Member
 
mdpuff's Avatar
 
Join Date: Nov 2013
Location: Alberta
Posts: 117
If I am understanding this correctly the turbo saver is a valve that opens to let the compressed air from the compressor "Dump" directly to the atmosphere under high load (throttle) applications freeing up a few horse power. By letting the air compressor (free wheel) there would be less load on the engine. Makes sense?? If this is the case then I like it! Wish I had that option on my coach. You can never have too much horse power!
__________________

__________________
mdpuff is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing filter on Haldex air dryer wagonmaster2 Winnebago Industries Owner's Forum 1 04-10-2014 10:51 AM
Jet air ride question BeBob Class A Motorhome Discussions 0 04-04-2014 01:25 PM
Air Horn works low Psi but not full psi? hkindle Spartan Motorhome Chassis Forum 4 01-21-2014 08:46 AM
Roof Air Lower Unit Question justgottarv Vintage RV's 1 01-17-2014 08:56 AM
I give up ! air dryer canister? gio8856 Fleetwood Products Owner's Forum 1 08-24-2013 12:17 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:28 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.