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Discussion Starter · #1 ·
Hi,

First of all, warm greetings from Toronto. Been lurking here for a short while and finally decided to register. I hope you guys can help me out with this car. I recently acquired a 1996 900SE that requires some work. Major? I am not sure. The engine is not running as one of the tensioners (if that is what the part is called) was whacked. The crankshaft turns (by manual manipulation)and I can see the piston heads moving. I was wondering if anyone out there has a service manual I can buy, borrow or if I can be walked-through by experts on the board. I need to know what parts to buy, disassembly and re-assembly procedures and what to watch out for. I've attached pictures. Thanks and looking forward to your valuable tips.

Jun
 

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First off, welcome to the site. I got a question here. so did the tensioner BREAK while the engine was running? because if this is the case, you are going to have to pull the heads off and probably replace 1/2 the valves. this is an interference engine, so it's very rare that when there is a failure of the timing belts or tensioners while the engine is running that the valves come out of it un bent. I don't think anyone here knows a whole lot about the saab 2.5 engine, but I can tell you the basics about it.
 

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Welcome - and glad to see another hands on sorta guy trying to figure it out. Those 2.5 Motors are nice motors - when running. Key thing about those is every 60K no matter what change the timing belt. As DeLorean said they are interferance motors - this is bad when a belt or tensioner fails - so to prevent this one should replace the belt every 60K. If this is done you'll hae a strong motor. I myself and not to informed on the 2.5 other then the basics - but I'd be more then happy to help on the basics. Hsa that motor been sitting outside? Looks a lil rusty on the gears there.... :roll: :shock:
 

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well, even IF you change the belts every 60K, your tensioners still go from the looks of this. guess those should be done along with the belts
 

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DeLorean said:
well, even IF you change the belts every 60K, your tensioners still go from the looks of this. guess those should be done along with the belts
I was just thinking that as I wrote that post - but wasn't sure so didn't want to say it - but it's all part of the preventative maintenance, Keep u on that and your problems will be minimal and less severe - but shit does happen.
 

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Discussion Starter · #6 ·
Hi Guys,

Thanks for the replies. I just came back from the Saab dealer here and bought the kit to replace the timing belt and the 3 tensioners(?). That cost me Cdn$730 :(

I am not completely sure whether the tensioner broke while the engine was running. My guess is yes considering the hole created by the broken tensioner (as seen by the smaller hole on the cover). I hope the previous owner shut the engine immediately. I am not sure what you guys meant by "interference engine" Perhaps you can educate me on that.

While I was purchasing the parts, the parts salesman asked me if I was gonna do the work myself (as opposed to bringing it to the dealership). I said yes and he countered that the work will need "special" tools. What tools is he referring to? Can you guys tell me? Also. what do I need to watch out for when I start the work? What about setting the timing? Markings that will have to be lined-up and all that stuff. I can really use TONS of help on this one.

There is a wrecker here who will sell me a used (running) engine for Cdn$1000 with about 300K kms on the odometer. He can't even verify if the engine on the car is the original and therefore can not say if all 300K kms on the car came from the engine. Should I just buy the engine? Your advise will be greatly appreciated.

Cheers.
Jun
 

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300k km is the best part of 200k miles so I would walk from that engine TBH.

An interference engine is one whose valves and pistons occupy the same space at different times in the cycle - belt/chain/tensioners fail, valves meet piston heads, and unless you're very lucky necessitate replacement of some or all valves and maybe pistons. Not pretty.

Are you up for the work that it entails?

If not, find yourself a good specialist and get them to repair, or source a decent (lower mileage :roll:) engine and do the swap yourself if you are confident.

If so, then I would say your next step would be to take the heads off and see if there's any damage to valves/pistons.

With regards to manuals there is the Haynes but I sincerely doubt this covers the V6. In which case your best bet is to buy a manual on the GM 2.5 V6. Not sure which US/Can cars had it, in the UK I believe the Vauxhall Omega used it?

Mind you, Haynes manuals are not what they were, you're lucky if it tells you how to change a bulb theses days... :(
 
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