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Discussion Starter · #1 ·
Recently I have bought a 94 Aero. As there is a missing bolt at the exhaust manifold the head has to be taken to be repair (all costs to be paid by vendor). I think the timming chain has to be taken out too for head extraction. My question is .... which timing elements have to be changed? I think this is the moment for timing chain substitution as the car has 120 kmiles on the clock.

Thanks in advance for your advice,

SUSO
 

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The timing chain remains insitu when the head is removed. The tensioner is removed then the sprockets are unbolted from the camshafts. On the B204 and B234 the chain should be wired up to prevent it dropping off the crankshaft sprocket. The head can then be removed leaving the chain in the timing cover.
 

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Per Dereks comments, their will obviously be some extra work to remove the chain, if work added to a head repair job.

Definately a good time to check out the condition of the teeth on BOTH upper and lower sprockets, and both cam chain guides, as these may all need replacing a the same time. You can get a kit from 2 stroke to Turbo (etc) for around £120 odd (fee from memory), which is probably the most cost effective.

Timming chain tensioners do not normally need replacing, but if they fail effect is the same as a timming chain breaking.

BUT, if you have a BALANCE SHAFT engine, the balance shaft chain should also be changed, which virtually doubles up the cost!
 

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Discussion Starter · #4 ·
Thanks Derek and Paul D. I think I have a Balance Shaft engine because it's a B234R unit.

The point is that I don´t want to have problems in the near future because of a faulty timing or balance shaft chain.

I have bought this 9000 Aero because my girlfriend didn´t like the 900 Aero I was looking at, and the more time it passes the more I like the car (even I still think that 900 is a superb car). I think it's time to do that chains job not have those problems in the future, but in all depends on what the cost will be at my local SAAB dealer.
 

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suso,
Get a detailed quote on this job, the Saab dealer is likely to want an arm and both legs..
Pattern parts are availible and save hundreds if we're talking balance chain etc..
My specialist has been using pattern parts for a while now, with no ill effect. Remember, it's his good reputation on the line if the engine went tits' up after having a rebuild, so he has to be confident.
Nick.
 

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Discussion Starter · #7 ·
You have to consider that I have to take the car to my local dealer for head repair job PAID BY THE SAAB DEALER I bought the car from (450 Km from my place). So the point is that as I have to take the head out I don't think there will be much more work included (I have been quoted for 14h labour).

Having considered this I will ask for a quotation for inspecting the timing and balance chains and guides.

I don´t know hows the garages market there in the UK, but here in Spain it is very difficult to find specialists. I know of a garage that has previously be a SAAB dealer but.... Why has it lose the dealership? Would SAAB has stop the dealership with this garage if it were of confidence? There are a lot of questions that make me think that for a delicate job like this I'd rather pay a little bit more ;-) and have a good job done.

I know SAAB don't make chains.... Car marques don´t make any component, ther works are just assembly places. But how are you sure you are buying a part with the same quality levels as specified by SAAB. If you know who makes oil filters for SAAB (MANN or BOSCH depending on the year) you can buy directly the OEM part instead of the OE SAAB and maybe you save some money. But not always.

To continue the example of the oil filter an oil filter for a AUDI A3 is made by BOSCH, and is the same as mounted in BMW 3 series. At least in Spain the price for a VW part is twice the OEM and this is twice the BMW part, therefore at independent garages in my area are fitting BMW filters.I think you have to look for quality parts not only for price.

I can tell you that the most frightening thing for me is labour cost not parts, as in a 1100 EUR job more than 600 EUR are for labour.
 

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Fair comment Susso.
Your market in Spain is obviously not as well served in terms of non franchised Saab specialists as ours within the UK, unfortunately.

Your Saab dealer should be able to inspect and advise on condition of the timming chain and at least top sprocket and guides without any additional cost.

Definately a good time to assess, and change if necessary, the timming chain and accessories. No harm in asking the garage for a price to do this job with, and without, a balance shaft chain change as well.
 
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