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Old 02-25-2013, 03:24 PM   #1
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First 9-5 Project

My friend was ready for a replacement vehicle, so I'll be helping him with a '99 9-5 project that we picked up yesterday.

Some pictures

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'91 9000CD Turbo, Auto, Iridium Blue
'91 9000T, 5MT, Tally Red (No-Start Project)
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Old 02-25-2013, 03:38 PM   #2
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Purchased with a noisy engine. Previous owner had it diagnosed by his repair shop as a bad piston/rings in #4. Our initial inspection confirms that.

At this point, we've got to make a choice about the upcoming rebuild... either buy Wossner forged pistons or build a 234/235 hybrid using a spare b234 I had laying around.

What motivates people to build the 234/235 instead of buying forged pistons? Is it primarily a money-savings thing?

This car will be a daily driver with the expectation that it goes another 100k. There is no specific desire to upgrade performance. My buddy is a machinist, so we won't shy away from any engine work. There's not a well-defined budget, but there's enough money to "do the right thing," if that makes sense.

We appreciate any input/advice/suggestions at this point. If Wossners are the way to go, do you have any vendor suggestions?

After tinkering with dozens of 9000's and occasional c900s and an '02 9-3, I'm kinda excited to work on a 9-5.

Last edited by dantinne; 02-25-2013 at 07:31 PM.
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Old 02-25-2013, 03:58 PM   #3
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the one thing funky about a 234/235 hybrid is the compression is reduced. i forget what it was said to be somewhere between 7:1 - 8:1
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Old 02-25-2013, 04:46 PM   #4
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Get the upgraded pistons. The hybrid motors feel lazy with the heavier internals and lower compression.
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Old 02-25-2013, 04:50 PM   #5
 
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I have a non-hybrid B234 in my 99 9-5, bought 5-6 years ago with a blown piston in the stock B235 (PO had some sludging issues...)

IIRC, engine was installed by a local shop, using timing cover, oil pan and manifolds from B235...

EDIT: If I knew then what I know now, I would just go with the stronger slugs...as long as there's no cylinder wall damage...
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Old 02-25-2013, 08:54 PM   #6
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I do 234/235 hybrid for a cheap repair on a car that will have "daily driver" duties. You have the block, head on the car is most likely fine, head gasket is all of $30...

Being an auto, you can squeeze just the engine out the top, makes that job pretty painless
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Old 02-28-2013, 06:48 PM   #7
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Yikes. Is this typical?

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Old 02-28-2013, 07:26 PM   #8
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If your cylinder wall has these markings in it, or similar to, it will have to get bored. Honestly, I'd bore it first over and get the 90.5mm Wossners, like I did. Peace of mind is nice with Saabs, especially the weak point of the motor.

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Old 03-02-2013, 10:14 PM   #9
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I'd probably go the route of rebuilding the motor with a +.020 bore. It does cost more (your buddy being a machinist will save a few $$). It also depends how extensive you go. In the 9-3 motor I just built I went and replaced... Well.. Everything, which ended up costing quite a bit. However it's practically a new motor now so I don't have to worry about it.
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Old 03-03-2013, 07:03 AM   #10
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Originally Posted by dantinne View Post
Yikes. Is this typical?

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Sadly yes if the car was running poorly and owner did not know...
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Old 03-05-2013, 03:29 PM   #11
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First 9-5 Project

Another picture of the piston:

ImageUploadedByAutoGuide1362525273.072921.jpg

We will be checking the bore (i.e. with a bore gauge) tonight.

As far as timing components, do you all typically install all new "everything" from the 93184480 kit?

Or is it more common to just replace the Timing chain, Balance chain, and guides?

Thanks!



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'92 9000T, 5MT, Black
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Old 03-05-2013, 04:15 PM   #12
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I replace everything in the kit. No point in not doing it.
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Old 03-05-2013, 04:43 PM   #13
 
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Quote:
Originally Posted by dantinne View Post
Another picture of the piston:
Yep...a classic B235 ring land failure. Those pistons suck long and hard.

Quote:
We will be checking the bore (i.e. with a bore gauge) tonight.
if it's not too far out of spec, or gouged, then new rings and pistons will be fine. You'll have some minor blowby until the rings seat but nothing too horrible.

Quote:
As far as timing components, do you all typically install all new "everything" from the 93184480 kit?

Or is it more common to just replace the Timing chain, Balance chain, and guides?

Thanks!

If the engine is out, and you're replacing everything, then you might as well have it rebored. The piston replacement route is just to avoid pulling everything....
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Old 03-05-2013, 06:32 PM   #14
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Originally Posted by SPG-GASM View Post
I replace everything in the kit. No point in not doing it.
I might have worded my question wrong. I meant to ask whether people just buy/install the whole kit or if its worth saving a few bucks by inspecting and ordering new components only if needed.

If we order the kit, all new parts would definitely go in.



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Old 03-05-2013, 08:33 PM   #15
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IMO if it wasn't recently replaced I would do it... Example the engine I just rebuilt had proof that the timing chain and guides were just replaced so I reused them.
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Old 03-06-2013, 04:54 AM   #16
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Also the price on the kit vs deprecate items may equal out in price. I would just use the kit, that way you know everything is new.
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Old 03-06-2013, 08:11 AM   #17
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Also the price on the kit vs deprecate items may equal out in price. I would just use the kit, that way you know everything is new.

OK, thanks guys!
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Old 03-07-2013, 06:52 PM   #18
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Quote:
Originally Posted by dantinne View Post
Another picture of the piston:

Attachment 10842

We will be checking the bore (i.e. with a bore gauge) tonight.

As far as timing components, do you all typically install all new "everything" from the 93184480 kit?

Or is it more common to just replace the Timing chain, Balance chain, and guides?

Thanks!



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lmao wow thats balls
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Old 03-08-2013, 09:24 AM   #19
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Originally Posted by mike saunders View Post
Yep
If the engine is out, and you're replacing everything, then you might as well have it rebored. The piston replacement route is just to avoid pulling everything....
AN agressive hone will help seat the rings, as long as there are not gouges you can avbiod the bore
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Old 03-22-2013, 09:13 PM   #20
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First 9-5 Project

Quick update. Timing and balance kits are installed... along with new Wossners I got from BrewCityBoost.

ImageUploadedByAutoGuide1364011775.276790.jpg

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'91 9000CD Turbo, Auto, Iridium Blue
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'92 9000T, 5MT, Black
'04 9-5 Wagon, Auto, Nocturne Blue

Last edited by dantinne; 03-22-2013 at 09:15 PM.
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