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Old 05-22-2009, 11:38 AM
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JimmyL JimmyL is offline
Rogue T Intolerant!!!
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,674
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

'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
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