Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-22-2009, 11:38 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Turbo is whistling, down on boost.......

1985 300TD {only one T please!}
At first I thought I had a wheel bearing squealing, but I finally realized it is the turbo whistling during boost. I am also down on boost pressure, from 10.5 to about 5.5 to 6. Car is noticeably slower of course.
I have:
*Removed and inspected boost line from manifold all the way to alda. No leak in line or at connection points. {overboost bypassed}
* Replaced waste gate hose. Had a few cracks in it, but that wasn't the issue apparently.
*Removed air cleaner and with inspection mirror looked for anything visually amiss with the turbo or associated piping.
*Air cleaner U-tube sealing correctly.
*No play in forward impeller inside the turbo.
*I have never messed with waste gate or anything having to do with this.
I don't drive this wagon all the time. I just began to notice this noise, and finally realized what it was. Haven't done anything under the hood prior to this happening.

I would welcome any ideas on a course of action from here.......
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #2  
Old 05-22-2009, 11:40 AM
DeliveryValve's Avatar
Chairman of my Benz
 
Join Date: Jun 2006
Location: Central California
Posts: 4,002
The ARV is at fault. Disconnect the vacuum and plug up the line. Drive around and report back.
__________________
1983 123.133 California
- GreaseCar Veg System


Reply With Quote
  #3  
Old 05-22-2009, 11:47 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Quote:
Originally Posted by DeliveryValve View Post
The ARV is at fault. Disconnect the vacuum and plug up the line. Drive around and report back.
Remind me, what exactly is the ARV {air recir. valve?} EGR???
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #4  
Old 05-22-2009, 11:58 AM
DeliveryValve's Avatar
Chairman of my Benz
 
Join Date: Jun 2006
Location: Central California
Posts: 4,002
Yes. Air Recirculating Valve. It is that growth on the front housing of the turbo with a vacuum line attached to it. The function is to lower boost pressure so that the exhaust backpressure is higher and more exhaust flows through the EGR.

I tried looking for pic, but don't have one available.
__________________
1983 123.133 California
- GreaseCar Veg System


Reply With Quote
  #5  
Old 05-22-2009, 12:39 PM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Quote:
Originally Posted by DeliveryValve View Post
Yes. Air Recirculating Valve. It is that growth on the front housing of the turbo with a vacuum line attached to it. The function is to lower boost pressure so that the exhaust backpressure is higher and more exhaust flows through the EGR.

I tried looking for pic, but don't have one available.


There is that evil falic looking device!
I had put a bb into the vac line to that a couple years ago. Does that have any bearing on this what-so-ever?
Where's a blocking plate when you need it......
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #6  
Old 05-22-2009, 12:44 PM
DeliveryValve's Avatar
Chairman of my Benz
 
Join Date: Jun 2006
Location: Central California
Posts: 4,002
The BB should of cut off the vacuum, thus rendering it useless. Try unplugging though, maybe your still getting vacuum in there. Or else the ARV somehow stuck open.
__________________
1983 123.133 California
- GreaseCar Veg System


Reply With Quote
  #7  
Old 05-22-2009, 04:20 PM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Quote:
Originally Posted by DeliveryValve View Post
The ARV is at fault. Disconnect the vacuum and plug up the line. Drive around and report back.
Ask a question, get a correct answer!!! How awesome is that!?

OK, gonna need some splaining please. I already had a BB in the upper line to the EGR appendage.


So I disconnected this bottom line gong to? and plugged both ends and I have full boost now!! Nice.



But what had happened, and what have I bypassed? This is of course an '85 model with about a million vac lines, and that line comes from a solenoid on the driver's fender over to the above connection point at the turbo area. What exactly is that where the vac line and green T are going to?

And as an awful aside, I sure wish I hadn't slammed my hood down on my phone! It didn't fair well at all.....
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #8  
Old 05-22-2009, 05:34 PM
ForcedInduction
Guest
 
Posts: n/a
Vacuum was getting past the BB, the BB was acting like a check valve to keep that leaked vacuum in the ARV and holding it open.

Check the vacuum and wiring diagrams, there is gobs of hoses related to the EGR and ARV that can be safely removed.
Reply With Quote
  #9  
Old 05-22-2009, 05:56 PM
TylerH860's Avatar
KHAAAAAAN-gress
 
Join Date: Aug 2007
Location: Wichita, Ks
Posts: 5,187
Isn't that the second time you've slammed your hood on a phone?
__________________
1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!
Reply With Quote
  #10  
Old 05-22-2009, 06:04 PM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Quote:
Originally Posted by ForcedInduction View Post
Vacuum was getting past the BB, the BB was acting like a check valve to keep that leaked vacuum in the ARV and holding it open.

Check the vacuum and wiring diagrams, there is gobs of hoses related to the EGR and ARV that can be safely removed.
Well, the line that had the BB is still intact. {the upper line to the egr}
The one I plugged today was the lower line going to whatever that part of the turbo assy is..........
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #11  
Old 05-22-2009, 06:06 PM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Quote:
Originally Posted by TylerH860 View Post
Isn't that the second time you've slammed your hood on a phone?
No, my son slammed the hood of his Mazda 3 onto his 16gig Iphone, and it was sticking halfway out from under the hood but it didn't damage it.
Mine didn't crack the display but cracked the lower buttons. {Samsung fake-Iphone}
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #12  
Old 05-22-2009, 07:02 PM
daw_two's Avatar
diesel enthusiast
 
Join Date: Jan 2007
Location: Germantown, TN
Posts: 5,432
Quote:
Originally Posted by JimmyL View Post
Where's a blocking plate when you need it......

In Coda's trunk.

__________________
daw_two
Germantown, TN

Links:
Current Car --- 05/2012 1984 300D Light Ivory, Red interior
Cluster Needles Paint
New Old Stock (NOS) parts

Past:
3/2008 1986 300SDL "Coda"
04/2010 1965 190D(c) "Ben"
& many more
Reply With Quote
  #13  
Old 05-22-2009, 07:02 PM
daw_two's Avatar
diesel enthusiast
 
Join Date: Jan 2007
Location: Germantown, TN
Posts: 5,432
Quote:
Originally Posted by JimmyL View Post
No, my son slammed the hood of his Mazda 3 onto his 16gig Iphone, and it was sticking halfway out from under the hood but it didn't damage it.
Mine didn't crack the display but cracked the lower buttons. {Samsung fake-Iphone}
Your phone still works, though.

__________________
daw_two
Germantown, TN

Links:
Current Car --- 05/2012 1984 300D Light Ivory, Red interior
Cluster Needles Paint
New Old Stock (NOS) parts

Past:
3/2008 1986 300SDL "Coda"
04/2010 1965 190D(c) "Ben"
& many more
Reply With Quote
  #14  
Old 05-22-2009, 10:05 PM
Registered User
 
Join Date: Nov 2004
Location: North central Texas
Posts: 2,575
How on earth did you find the time Jimmy?
Been missin' you here.
Reply With Quote
  #15  
Old 05-22-2009, 11:00 PM
Hit Man X's Avatar
I LOVE BRUNETTES
 
Join Date: Sep 2004
Location: FUNKYTOWN
Posts: 8,908
Thumbs up

Quote:
Originally Posted by JimmyL View Post


There is that evil falic looking device!
I had put a bb into the vac line to that a couple years ago. Does that have any bearing on this what-so-ever?
Where's a blocking plate when you need it......


I have an EGR kit if you want it, just PM me.

Also I can get a pic of my '85s underhood so you can see what to bypass/remove and where.
__________________
I'm not a doctor, but I'll have a look.

'85 300SD
'87 300SDL
'89 300E
'90 300SEL
'91 560SEL

Eight others from IH, BMW, GM, Ford, and Volvo.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
Reply With Quote
Reply

Bookmarks

Thread Tools
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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 03:44 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page