99 9-5 Turbo questions

I'm not sure how that correlates with "knocking", if you mean predetonation.

Assuming you mean the 2.3 Liter 4-cyl engine, it's right there, but yes the radiator probably has to come out. Shouldn't be a biggie.

Get some penetrating oil (Kroil if you can find it) on those bolts _now_, give it time to get in there. Re-apply every couple days; might as well make them as easy to get out as you can.

A neighbor just had a tractor turbo (also a Garrett) rebuilt by a place in Chicago - I have the impression it was a Garrett authorized shop. I've rebuilt Garrett turbos; if your comfortable with, say, a brake master cylinder, it's about that complicated and uses mostly the same tools (snap ring pliers, that sort of thing).

See above.

Sounds like pulling it, shipping it to a rebuilder, and re-installing it is the plan then? Seems solid, if in fact it needs rebuilding. Can you describe the "knocking"? Is it a whine or a howl coming from the turbo, related to boost, or what? Knocking doesn't reconcile with a turbo failure, I can't imagine.

Dave Hinz

"Bill Jackson" skrev i en meddelelse news:0zo6d.244534$ snipped-for-privacy@twister.nyroc.rr.com...

Have you checked your crankcase-ventilation isn't clugged. It's a very common error on the early 9-5's. Saab has a fix for this, a new oiltrap on the crankcase ventilationhose....

Cheers!

More info....

Today the "check engine" light came on and at about the same time the temp gauge on the dash went dead. At the same time,t he knocking stopped. Me thinks that the knocking is unrelated to the possible turbo failure and probably I lost a temp sensor or something like that. Mid day, the temp gauge started working again and the knocking came back. Odd....

As for the questions on the turbo,yes I'm comfortable with a rebuild of master cyl. I've even done entire engines in the past. But I was under the impression that turbos were something that you had to have special tools to rebuild and balance.

Finally, I did check the PCV one time in the past when I read about the TSB to no end. The dealer told me the blue puffs were the need for a turbo, but the car runs very strong and has no real indication otherwise that anything is wrong.

see other post on knocking

I don't get any whining or howl from the turbo, did get that on the volvo that I did years back. The car seems to run strong and otherwise is performing great.

Yes, sounds like you have more than one problem going on at the same time which is getting the symptoms all inter-confuzzled.

Well, the rebuild on the Garrett up to at least the mid 1980s is just snaprings and wrenches, and about the balance thing - if you put together all of the rotating parts in the same orientation as they're currently together, it'll be as balanced as it was before you took it apart, right? Unless I'm overlooking something, only the 2 impellers, the shaft, and the nuts on each end rotate, and only the 2 impellers and the hot-end nut have anything that involves balancing. I seem to recall the procedure included removing the nut from the cold side and pulling the shaft/hot impeller out the hot side, but it's been a decade...

I'd put the turbo at the end of the list, a bit of blue smoke isn't a good reason to dump a couple hundred bucks just yet.

Not too much less that letting them do it, and if you factor in hassle, it's worth having it done by them it sounds like. Good to know. Someone else here suggested something about an oil breather valve or something, which might deal with the blue smoke, but the knocking and the temp gague (especially in relation to each other) isn't making sense yet.