Just got the 940 running good last night with some help from the folks here on the forum. Both fuel pumps and the regulator have been replaced. However now, it looks as if there is smoke coming from the band/back half of the turbo housing... There is some smoke from the exhaust as well, and I am suspecting turbo seals? As soon as you start it up and let it run a minute or so, it begins to have smoke rising...

I have a rewelded 90+ manifold and 15G waiting to go on but I'd like to know if the stocker is kaput.

Any ideas?

Cheers, Mike

 

Hard to tell by your description... May be.

 

Hi Lev,

I can clearly see it appears to be rising from the center of the turbo, where all the lines connect. I start it cold and it begins to smoke, almost immediately. Not a big billowing plume, but definitely noticeable and you can smell it inside the car as well. Today is a rainy day here, so maybe I'll get to pull it in the garage and begin the 15g swap-over. I guess I'll be able to tell if the old turbo is done for by checking shaft play? I'll post my findings, thanks.

Cheers, Mike

 

The SHAFT PLAY is more about the condition of the BEARING. This seems more like the seal as you thought. You can rebuild it or have it rebuilt, not that hard.

I suggest you go to FULL SYNTHETIC oil, and increase the change interval to 5k miles. That's what I do to my TURBOS anyway...

 

Hi Lev,

I just pulled off the stock turbo and found an oil mess in the back half of the turbo. There was oil trickling into the exhaust pipe and some was also running back down towards the mounting flange.

I have a good welded manifold ready to go back on but I noticed my original manifold has the provision for EGR... the welded one does not. Should I go ahead and run the welded up non-EGR manifold or should I get the original one fixed and reuse it? I read elsewhere on a search that this will only trip the check engine light and not really mess anything else up.

Thoughts? Thanks, I value your opinion.

Cheers, Mike

 

I'd keep the original. I personally don't modify things if I can help it--this way I save myself a lot of trouble...

I don't know what it costs to do that weld on the original but it can't be too bad.

I am a big junk yard user, "pick your own" part especially. With the 6-7 Volvos I have at any one time I need to be frugal. If you can find a used manifold in a JY that's another way to go...

 

Most all 90+ mani's crack in that location. I think over the life time, exhaust gaskets get replaced and folks neglect to reinstall the lower brace. As Lev has said, couldn't cost much to reweld the original. It's the simplest thing. You could also swap in a non-egr ecu and use the new mani...but who knows what issues that might create.

 

Hello and thanks for the replies.

Yes, after much thought and more research, I'm going to drop off the manifold down with the old country welder and have him add two "caterpillars" across the back as he did with the other one he fixed for me. He only charged me 15 bucks to do it and it looks nice and solid. He did the same repair to my sons 740 manifold and it's holding up fine. As yous pointed out, keeping close to stock is the key to minimal troubles. I'll save the non EGR unit as a spare...

[However I did find a Garrett and fabbed up an "adapter" plate... maybe those two ought to get together.. and see what happens..**LOL**]

Cheers, Mike