Someone messed with it before I bought the car, the change over valve was disconnected so I replaced it and reconnected the vacuum lines but it has no power and smokes when revved. I thought I would start out with a new ALDA with factory settings, i didn't realize it was that much trouble to get one.
Thanks

There are no vacuum lines to the ALDA. There's a pressure line from the manifold to the overboost solenoid on the firewall and then onto the ALDA. Typical lack of power is due to clogging of these lines or the banjo bolt in the back of the manifold. While the ALDA could be the culprit, it's unlikely.

This is a very good thread...

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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

It only comes on a new assembly.

Injection pump
$7320.00

A good used ALDA is recommended.

.

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Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
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Technical Quality Auditor.
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1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Ok,

Pulled apart a spare ALDA and inside are (2) copper discs, that appear to be under pressure. There is an 'O' ring that seals the upper and lower halves and there is a smaller 'O' ring around the plunger stem on the lowermost copper disc.

That's it. No springs and nothing to really jump out at you.

Testing this ALDA I discovered the plunger moves out when vacuum is applied and the plunger retracts when pressure is applied.

The unit I pulled off my car leaked around the plunger and you could blow through it with only slight resistance. Although I simply replaced it with a better used unit, changing the 'O' rings is very simple.

I have found the best performance in my 300SD (after much experimentation) is 12 psi of boost, the ALDA all the way out CCW and 3.0mm shims between the ALDA and the pump.

Normal driving at 65-70 mph I am producing 10 psi of boost and the acceleration is remarkable for a 617. Shown is my boost gauge rigged for So Cal freeway testing.

I will post photos of the ALDA's internals later this evening...Robert

Attached Thumbnails

 

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

http://www.w124performance.com/images/OM603_injection/

__________________
Dave
Boise, ID
Check out my website photos, documents, and movies!

Yep, that's it....are the seals available as a kit????

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

NO.

They never have been available.

.

There is a Bosch part number for the large square-section O-ring that seals the two halves of the body, but you'd need to buy it from a Bosch service center. I've never tried to buy this and I don't know if it is available, or what the price might be.

There does not appear to be a Bosch part number for the small shaft seal, however years ago someone found an aftermarket source for those. Unfortunately this person never disclosed details about his source, and I haven't been able to contact him for years.

You can use sealants on the large O-ring to fix pressure leaks between the body halves, but if the shaft seal is leaking, it must be replaced to stop the leak. Note that a slow leakdown is acceptable, but rapid leakdown is not...

__________________
Dave
Boise, ID
Check out my website photos, documents, and movies!

I simply replaced mine (slow leak) with a good used one, but I will do some research on the 'O' rings....

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

The green seal looks like a Toyota Supra throttle shaft seal...

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Having a sealed ALDA is nice!!!!

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Any input on this would be appreciated

Is fuel flow the only difference between turbo and NA pumps?

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190D SOLD
2.5 non turbo
5 speed manual transmission
Build date: December 1985
W211 E320 CDI
W126 350SDL
X204 GLK 250 Sans Bluetec