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Old 09-09-2007, 01:11 AM
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Join Date: Aug 2007
Posts: 28
How to tell if Turbo is out? 83 300SD

1983 300 SD 304,000 miles

First, let me say that this forum and this parts place has been absolutely awesome. One of the most beneficial uses of the internet that I have ever come across - and some of the most helpful people too!

I have only had the car just over a month. How do I tell if the turbo is working or not? Are there any tell tale signs? Since I never drove it prior, I have no reference point. I thought I see if I can figure this out, cuz if I need to work on it, then I might as well do it while I do the first 3 items on my DIY to do list below...

My other DIY to do list is:

Replace AirFilter
Replace AirFilter Bracket
Install "Anti-Vibration" kit for above
Fix Visor lights
Take out rear ceiling cover and reshape with metal rib
Ponder on changing stock vaccumm stuff to the recommended bypasses covered in this forum

Everything else is original and working (crossing fingers!). I love this car!


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Old 09-09-2007, 04:40 AM
greasybenz's Avatar
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Join Date: Nov 2005
Location: San Francisco, CA
Posts: 2,082
With the engine running, stick you finger in the turbo and see if your finger is still on your hand when you pull your hand out of the turbo....

Ok all jokes aside, put a boost gauge on it, thats the only 100% way youll know your turbo is producing boost.
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