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06-13-2012, 06:37 PM
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#1
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Registered User
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Oct 2010
Location: 8,600 feet elevation
Posts: 209
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Screaching noise coming from engine area
Hi, I have a screaching noise coming from the engine area, most noticable with the engine in 6th gear and going about 50-60 mph under slight exceleration. I don't believe it's a pulley issue, as it goes away occasionally. It sounds like a loud screaching high pitched noise.....maybe some type of sensor??
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06-13-2012, 07:44 PM
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#2
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Senior Member
Join Date: Feb 2003
Location: Jarrell, TX 76537
Posts: 4,501
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My guess. Serpentine belt and/or belt tensioner. If you replace the tensioner get the Gates one.
__________________
Dale
AKA - Oemy
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06-13-2012, 07:46 PM
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#3
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Registered User
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Oct 2010
Location: 8,600 feet elevation
Posts: 209
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I did replace the belt tensioner with a Gates when I replaced the belt. It's not a belt or tensioner issue.
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06-13-2012, 07:48 PM
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#4
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Senior Member
Monaco Owners Club
Join Date: Mar 2000
Location: Yuma Arizona USA
Posts: 2,993
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Quote:
Originally Posted by oemtech
My guess. Serpentine belt and/or belt tensioner. If you replace the tensioner get the Gates one.
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X2:
Replace them both and be done with it.
__________________
Brian, Loretta & Lucy (Golden Retriever)
2008 HR Endeavor 40 PDQ , ISL 400
2010 Dodge Ram 1500 Toad
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06-13-2012, 08:02 PM
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#5
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Registered User
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Oct 2010
Location: 8,600 feet elevation
Posts: 209
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As you can see by my posts, I have replaced both.
Any more suggestions?
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06-13-2012, 08:08 PM
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#6
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Senior Member
Join Date: Feb 2003
Location: Jarrell, TX 76537
Posts: 4,501
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Look at the rest of the accessories that are driven via the serpentine belt.
__________________
Dale
AKA - Oemy
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06-13-2012, 08:42 PM
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#7
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Member
Join Date: Apr 2010
Posts: 87
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One of the other spots is the bearing on the a.c. pump. Mine went out,it was not there all the time. The bearing can be replaced very cheaply. No need to replace the whole unit.
__________________
2005 Monaco LaPalma W24
2005 Ranger,U.S.Gear
Blue Ox
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06-13-2012, 08:54 PM
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#8
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Registered User
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Oct 2010
Location: 8,600 feet elevation
Posts: 209
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Will the AC pump bearing screach when the AC is off?
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06-13-2012, 09:47 PM
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#9
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Senior Member
Workhorse Chassis Owner Rexhall Owners Group
Join Date: Feb 2003
Location: Everywhere,USA
Posts: 1,518
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Pull the engine cover and drive it. Might be good to take someone along that can get down there and listen.
__________________
Full-Timers
in a
2003 Rexhall Aerbus 3550BSL
W22 Workhorse
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06-13-2012, 09:59 PM
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#10
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Jun 2008
Location: Glendora Ca.
Posts: 1,584
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MntDriver, yes on the pump bearing it is always working when engine running. If it seizes up it will ruin the compressor. I would change it to be safe.
Mike
__________________
2004 Monaco Monarch
Blueox, SMI, 1990 Wrangler YJ
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06-13-2012, 10:08 PM
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#11
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Quote:
Originally Posted by mfire1339
MntDriver, yes on the pump bearing it is always working when engine running. If it seizes up it will ruin the compressor. I would change it to be safe.
Mike
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On ours the pulley freewheels when the AC is off and locks up when on. If the squeal comes and goes without regard to whether the air is on or not then it's somewhere else!!
There are known squealing problems with some belts too.
On our rig it seems to emanate from the DW's mouth when I get too close to a drop off or other vehicle. Got really bad on the road from Fishing Bridge going out the East entrance of Yellowstone!!
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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06-14-2012, 05:02 AM
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#12
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Registered User
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Oct 2010
Location: 8,600 feet elevation
Posts: 209
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So the general consensus would be that the screeching noise is some type of pulley bearing....maybe the AC bearing? (I still hear it when I turn the AC on and off).
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06-14-2012, 05:17 AM
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#13
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Senior Member
Gulf Streamers Club Workhorse Chassis Owner Ford Super Duty Owner
Join Date: Sep 2005
Posts: 380
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I thought pulley; but, Workhorse kindly solved my noise with a Goodyear Gatorback. Make sure you get the correct size by crossing the exact numbers on existing belt.
These Goodyear Gatorback Poly-V serpentine belts run quieter, stretch less, and transfer more power than other belts. As they warm up, the composite construction between the cords and rubber compound becomes more efficient at turning your engine's accessories. And by absorbing the shock and vibration transmitted from the crank pulley, the belts can help your harmonic damper to better reduce harmful vibrations.
__________________
2008 Gulf Steam BT Cruiser Model# 5316B // 2007 Ford E450 Chassis, V10 [FONT="]Koni FSD, Rear Air Lift 5000
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06-14-2012, 05:25 AM
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#14
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Registered User
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Oct 2010
Location: 8,600 feet elevation
Posts: 209
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Quote:
Originally Posted by iRV4FUN
I thought pulley; but, Workhorse kindly solved my noise with a Goodyear Gatorback. Make sure you get the correct size by crossing the exact numbers on existing belt.
These Goodyear Gatorback Poly-V serpentine belts run quieter, stretch less, and transfer more power than other belts. As they warm up, the composite construction between the cords and rubber compound becomes more efficient at turning your engine's accessories. And by absorbing the shock and vibration transmitted from the crank pulley, the belts can help your harmonic damper to better reduce harmful vibrations.
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I had originally thought it was the belt and the tensioner, and had them both replaced last year, and the screeching noise is still there like I have posted.
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