Date: Sat, 13 Nov 2004 08:53:54 GMT From: "Dave" <davetempnospamueyonder.co.uk> Subject: Re: changing Timing chain and balance chain
Many thanks for comments, also to Fred and Vesku Yes I do appreciate these comments are without warranty etc! But it is a good place to knock around ideas. I did wonder if oil may be a problem at first but went away from that idea as it sounded more like chain, dont know is probably better answer! The exploratory op is starting next week, so I'll have a surf round net and have a chat with my garage, who are usualy realy good.and do not mind talking though before hand etc. Like Vesku said why does it get quiet when warm, I just thought of expansion of engine/chain etc, is there any easier way to check the oil idea first. And showing my lack of knowledge - does the oil pressure apply the tensioner - if I read your comment correctly or is it just spring loaded? One last thought the car was running a bit rough for a few weeks so 2 weeks ago we suspected dirty injectors, so put some redex in last two tank fulls of petrol, presumably this would not cause this at it is just in fuel areas not the oil. Car runs great now except for noises. Regards Dave "Dexter J" <lamealameadingdongnospamlamelame.org> wrote in message news:opshdobtbnu3ky2rnospam.eastlink.ca... > Salutations: > > On Fri, 12 Nov 2004 23:14:19 GMT, Dave <davetempnospamueyonder.co.uk> > wrote: > >> Many thanks Dexter for all the typing!! >> I have decided to have the work done as the body is realy good and front >> shocks and brake disks have been replaced in last year and rest of car is >> in >> good shape, so fingers crossed it should run on for a few years yet. My >> reasoning is I cant sell car for much with engine faulty, and to replace >> it >> with a similar age one I may end up with the same and / or other problems >> and I cant aford a nice shiny new one yet! >> >> "Vesku" <noveskuspamnospammail.de.invalid> wrote in message >>> Could the noise come from valve adjusters ? >>> >>> I think that's quite common cause for cold start noise in those engines. >>> >>> If it would be from chain why quiet when warm ? >>> >>> br Vesa >>> > > You appreciate that any advise presented in this form is only offered with > all the usual disclaimers.. :/ .. > > Anyway - brother Vesku may well be moving along a correct line. It may > well be that you are not making enough oil pressure to fully apply the > tensioner until the oil warms up enough to thin. The timing chain itself > may also be stretched a little and the combination is presenting as loose. > > If this is the case - the lash noise will sometimes last longer with fresh > heavier grade oil. > > It is therefore vitally important that you have the chain measured very > carefully before you close up the case to confirm it is *well* outside of > specification. 140,000 miles is a little early for a SAAB timing chain to > go loose actually - and thus, you may well be suffering from bad oil > pick-up as well. Some 2.3 engines have a problem with wax forming on the > strainer or in the pump housing. > > That said - it may well also only be the balance chain alone as that is a > known culprit in a middle aged 2.3 engine. Several folks have had their > 2.3's modified to remove the balancers and I may well give it a try when I > have to do mine in the aero. > > In short - you want to know as much about *why* the chain is making noise > before you start replacing parts. Very best of luck with it brother Dave - > I think you should put in some google time over the weekend regarding this > so as to be able to discuss it with your shop carefully. > > It is at this point that a greater SAAB/Owner relationship can become > either a complete paradise as you both get another 140,000 miles smiling > all the way to the bank - or - a joy of life sucking vampire from which > there is no financial escape short of a loose road flare in the trunk and > a no service cell phone zone. > > Here at alt.autos.saab we always hope it's the former. > > Cheers. > > -- > > Radio Free Dexterdyne Top Tune o'be-do-da-day > Tim Tamashiro - All I do is Dream of You > http://www.dexterdyne.org/888/155.RAM > > all tunes - no cookies no subscription no weather no ads > no news no phone in - RealAudio 8+ Required - all the Time
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