chain tensioner gap of 7.9mm.. and rattling noise

[ella_2007]

I was considering to replace my chain as i am going to do my gasket soon..

opened up the tensioner today for first time

it wasnt so bad as i imagined.. the gap is 7.9 mm, i think its still far from the threshold.. lucky..

is it a nromal reading for a 1992 900i 177000 km??

i was expecting something like 10 mm or more o.o because i can actually hear some rattling noise while warming up the engine.. i guess it is just the valve..

now i guess the chain is fine, i only have to do the gasket now..

[SpecialTool]

While you've got the valve cover off, pop in a new top timing chain guide -- you may be pleasantly surprised how much quieter the engine is.

[ella_2007]

oh?

so it is called top timing chain guide?? i assume i need two of them right??

thanks!
i will order them on monday

[grif900]

There Is only one.

[TooMany2cvs]

I've gotta get round to measuring the tensioner on mine (160k(ish) miles) - it's a little rattly from a cold start, but I'm not sure if it's the chain or the hydraulic tappets, as it quiets down very quickly once oil's circulating - which suggests the tappets to me.

177k km - about 110k miles - seems "nicely run in" for one of these engines. Could it be tappets? How quickly does it quiet down?

[philjohnhb]

According to my local Saab trained independant if the chain is only noisey on start up and before the engine is warm then there is nothing to worry about

[ella_2007]

Originally Posted by philjohnhb

According to my local Saab trained independant if the chain is only noisey on start up and before the engine is warm then there is nothing to worry about

ya, my school'd mechanic said so..

but i think its better to actually measure it...

btw,

is the timing chain in 900 turbo easier to break than in 900i??? or just ppl tend to rev it up in turbo car?? to open the boost

[ella_2007]

Originally Posted by TooMany2cvs

I've gotta get round to measuring the tensioner on mine (160k(ish) miles) - it's a little rattly from a cold start, but I'm not sure if it's the chain or the hydraulic tappets, as it quiets down very quickly once oil's circulating - which suggests the tappets to me.

177k km - about 110k miles - seems "nicely run in" for one of these engines. Could it be tappets? How quickly does it quiet down?

the rattling noise quiet down in say 3 min?? i am not that sure...
the engine run very very well
but it has a blown gasket i think bubbles in water tank.. i need to refill 200 cc
every 2 to 3 weeks, a minor leak

i plan to do the gasket soon...

and damn i think i made a mistake when i put on the tensioner, i refited the tensioner and i dont know why i torqued another 15 to 30 degree on the tensioner body after the little spring thing is put in by 22 Nm, it is very very bad

i dont know why i did it ... hopefully 30 degree is not so much.. it might give too much pressure to the guide .. DAMN

[TooMany2cvs]

Originally Posted by ella_2007

the rattling noise quiet down in say 3 min??

Ah. Mine's more like three seconds.