On 1/13/2011 10:18 AM, Mark in Lakewood CO wrote:
Don't test the turbo spin with your finger! You should be able to hook a vacuum gauge to one of the ports on the line from the pump to the brake booster and get a reading.You can check to see of the turbo is spinning by removing the u-shaped tube that connects the air filter housing with the intake side of the turbo. Even at idle, the turbo should be spinning.
For further turbo checks, I would refer you to the w116.org website, where they've made available the service manual for the 116:
http://handbook.w116.org/engine_78_d.htm
Clicking on "Main Function Group 09" will bring up the service procedures in .pdf for the turbo.
And I swear the service information for the vacuum pump is in there, too, somewhere, but I can't for the life of me find it right now. Could be a problem with the website (parts of it may have been washed away by flash floods, as the w116.org website is maintained by Aussies...).
I have the file for rebuilding the "double diaphram" pump, if that's they type you have. Ping me offline and I'll send it to you, if you want.
Mark in Lakewood, CO
To: diesel_mercedes@yahoogroups.com
From: barton.fiske@gmail.com
Date: Wed, 12 Jan 2011 18:23:56 +0000
Subject: [diesel_mercedes] Re: Sylvia - 1983 300 SD - Major maintenance down under - "glowing" results (so far)
Questions for the day (apologies if asked/answered previously):
1). Is there any ad-hoc anyone can tell determine if the turbo is or is not working (given there's no turbo gauge like my 33 y/o Saab99)?
2). Are there tests of the vacuum pump operation that can be done w/ unit in the car, engine running?
thx,
barton
.
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