Wastegate actuator swap for OM602.962? - Page 24 - PeachParts Mercedes-Benz Forum

gsxr · #**346** 09-04-2012, 08:07 PM

Quote:

Originally Posted by shertex

OK....I've got an email in to several Garrett distributors.

Got my fingers crossed that you'll have better luck than I did!

benmack1 · #**347** 09-04-2012, 08:35 PM

Quote:

Originally Posted by 300D-91

I did mine to prevent future problems and it was the ideal time since the EGR valve was 99.9% non functional and being removed.

One quick tip, rather than cut & thread the rod I simply installed the nuts from the old unit on the new unit before installing it. This moved the actuator far enough that no cutting was required and allowed some pre-load.

Awesome website at the bottom of your signature 300D-91. People should check it out, also great pics on the EGR removal and using the cover plate to plumb the pressure wastegate!!!!

JamesDean · #**348** 09-05-2012, 02:19 PM

Can anyone get me a measurement of the distance between the bolts on the actuator?

From what I gather the unit that we're after is NLA.

I'm on the hunt for suitable replacements...

The ebay one lists its distance as Mounting bolt distance: 1 5/16" / 33.5mm approx.

Is that even close to the stock spacing?

auspumpen · #**349** 09-05-2012, 05:47 PM

Quote:

Originally Posted by gsxr

Y'all should be trying to find a wastegate that fits the 1987 190D Turbo, which should be 100% bolt on for the 124.128 motors. I was never able to definitely pinpoint the part number for this, nor locate a source... I think it would eliminate the need for rethreading the rod or shimming the mount. Since I no longer own any 602.962's, I'll have to pass the baton to the next guinea pig.

I've mentioned it before, but the actuators from Garrett turbos used on the OM603 are almost a direct bolt-on to the OM602. I included a picture a few posts back (#309) of the one attached to my daily driver.

gsxr · #**350** 09-05-2012, 05:53 PM

Quote:

Originally Posted by auspumpen

I've mentioned it before, but the actuators from Garrett turbos used on the OM603 are almost a direct bolt-on to the OM602. I included a picture a few posts back (#309) of the one attached to my daily driver.

Are you sure about that? The Garrett T3 actuator from my 603.960 is physically larger than the Garrett T25 acuator on my old 602.962. Didn't look to me like they were interchangeable but it's been a while since I looked, maybe I missed something...

shertex · #**351** 09-05-2012, 06:10 PM

Quote:

Originally Posted by JamesDean

From what I gather the unit that we're after is NLA.

You're referring to the actuator that would fit without modification, correct? ATP should get the other one back in stock eventually.

JamesDean · #**352** 09-05-2012, 06:49 PM

Quote:

Originally Posted by shertex

You're referring to the actuator that would fit without modification, correct? ATP should get the other one back in stock eventually.

I was referring to the one email you fwd'd me. The one seemed to indicate NLA.

shertex · #**353** 09-05-2012, 06:52 PM

Quote:

Originally Posted by JamesDean

I was referring to the one email you fwd'd me. The one seemed to indicate NLA.

Oh....well if the Garrett rep is referring to the one everyone around here got from ATP then I hope he's wrong! The woman I spoke to at ATP seemed to think they'd be getting more.

auspumpen · #**354** 09-05-2012, 06:55 PM

Quote:

Originally Posted by gsxr

Are you sure about that? The Garrett T3 actuator from my 603.960 is physically larger than the Garrett T25 acuator on my old 602.962. Didn't look to me like they were interchangeable but it's been a while since I looked, maybe I missed something...

Yep, you just add about 3mm worth of shims that stand it off of the mount, which allows it to clear the inducer housing.

shertex · #**355** 09-05-2012, 07:02 PM

Quote:

Originally Posted by auspumpen

Yep, you just add about 3mm worth of shims that stand it off of the mount, which allows it to clear the inducer housing.

If that's correct, then where could we get the equivalent of THAT actuator (other than off on old 603)? In other words, a new part.

JamesDean · #**356** 09-05-2012, 07:32 PM

Quote:

Originally Posted by shertex

If that's correct, then where could we get the equivalent of THAT actuator (other than off on old 603)? In other words, a new part.

Lots of T3 compatible units on eBay:

T3 T4 Turbo Single Port Wastegate Actuator 90 Degree | eBay

T25 T28 GT28 Turbo Internal Wastegate Actuator Nissa 6mm Hole 2.75"L Rod 7 psi | eBay

It seems like the original LOT OF 5 I found on eBay would work, based on the fact that the T3's work on our turbos and the T3's bolt spacing is 1-5/16. Therefor 1-5/16 bolt spacing with adequate rod length should do the trick.

auspumpen · #**357** 09-05-2012, 07:37 PM

I think you want something that opens at around 15psi rather than 7psi. You can use a boost controller to fix that, but it's not ideal. That 603 actuator doesn't require any external controllers.

JamesDean · #**358** 09-05-2012, 07:40 PM

I assumed you could adjust the opening psi by varying the rod length.

300D-91 · #**359** 09-06-2012, 08:16 AM

Thanks

Quote:

Originally Posted by benmack1

Awesome website at the bottom of your signature 300D-91. People should check it out, also great pics on the EGR removal and using the cover plate to plumb the pressure wastegate!!!!

300D-91 · #**360** 09-06-2012, 08:21 AM

Kris,

Here is the response I received from ATP on adjusting the boost:

"That actuator was made available as a standalone part after your colleagues in the MB Diesel world requested it be made available to convert your turbo from vacuum actuated to pressure actuated. We have no idea what the "net" boost is once that actuator is installed on your engine. However, typical install is to adjust the rod length so that it's about an 1/8" too short to reach the wastegate arm and pull on it 1/8" to get it to hook on. That's about typical preload setting. Every actuator has about 1-2 psi of base pressure change depending on preload so if your boost gauge shows resulting boost is a bit low, you can adjust the rod a little bit short until you get the base boost pressure to be to your preferred boost pressure, via more preload."

Quote:

Originally Posted by JamesDean

I assumed you could adjust the opening psi by varying the rod length.