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  #1  
Old 09-29-2009, 02:28 PM
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Cool OM603 Turbo Troubles

Hello,

I started a new thread after my "Knock Knock" adventure of rebuilding my OM603 for the third time in two years!

The engine has been running well and has been running normally aspirated.

I hooked up the turbo and no joy.

My turbo is recently rebuilt unit and is not working!

The turbo is spinning freely.

There is no movement of the control rod and I am applying 25HG of vacuum to the actuator unit using a hand pump.

Anyone know of a site with a free manual for the Garrett T3 turbo?

HELP!

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  #2  
Old 09-29-2009, 02:51 PM
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I thought the 603 had a pressure actuated wastegate...
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  #3  
Old 09-29-2009, 03:18 PM
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Cool Thats news to me!

Quote:
Originally Posted by KarTek View Post
I thought the 603 had a pressure actuated wastegate...
That is news to me! I assumed that it is vacuum actuated as are the door locks etc on the car.

I am not finding any info in my electronic manual for this gadget.

Ed
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Old 09-29-2009, 07:05 PM
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Pressure actuated, should be fully open at 11.4psi IIRC.
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Old 09-30-2009, 12:00 AM
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Cool No Go

Quote:
Originally Posted by babymog View Post
Pressure actuated, should be fully open at 11.4psi IIRC.
I blasted it with 90 PSI with the rod disconnected and it would not budge.

Houston.........we have a problem.

Thanks Jeff.

By the way, what is IIRC?

Ed
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  #6  
Old 09-30-2009, 12:06 AM
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If I Remember Correctly.

This is in an '86/'87? In these (the OM603.960 and OM603.961) the wastegate is pressure-actuated, also I believe (or IIRC if you prefer) that the '90/'91 603.970 (350SD/SDL) is pressure-actuated. If you have a '92-up (W140 body) then I don't know, seems that I've read that it is vacuum-actuated.

You should be putting 10-15psi into the little hose connection on the actuator right? That should move the rod and the wastegate flap.

Oh, I like your location, cool.
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Old 09-30-2009, 01:11 AM
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Cool NADA

Quote:
Originally Posted by babymog View Post

You should be putting 10-15psi into the little hose connection on the actuator right? That should move the rod and the wastegate flap.
Well I tried to be nice to it. But I went to 90 PSI and it will not move. I also put it in a vise and pulled on it with an estimated force of 200 Lbs. Nothing! No movement.

I am trying to locate a replacement but none of the usual suspects seem to have it in stock.....ugh!
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  #8  
Old 10-03-2009, 06:36 PM
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Cool Progress

Well I managed to get it to move. I sprayed WD40 into it and let it sit. I applied 90PSI to it and it moved! It is moving freely now! But it still seems to need a lot more than 10-15 PSI to make it move.

Where can I find some references for this turbo?

Is it possible to have the wrong waste gate control valve?

Ugh!

Ed

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