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I am re-reading instructions for doing the tensioner (I cannot remember exactly the source found by link on this site or similar site) - about 'holding the centre screw while 'turning the tensioner eccentric' with an allen key, turning only clockwise ... 'centering the tensioner fork'; 'ensuring eccentric at 10 o'clock ...' and other quite detailedly scary descriptions ... I am starting to lose confidence ...
So, does anyone have a simpler description about the tensioner so I can figure it more easily in my head?
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Do you mean this:
http://volvospeed.com/volvo_repairs_how_tos/engine_repairs/manual_tensioner_adjustment.html
Klaus
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Always willing to listen, just not able to take direction.
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Dear Klaus, thanks for that link.
I tried to do the job, but I couldn't for the life of me get passed that little semi-circular bottom cover behind the crank pulley and under that pipe ...
I have the belt and parts and will take to my garage which gives me mates rates.
They will likely take off the pulley but I worry cause I hear also that the serpentine belt tensioner is nasty.
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Those 2 10mm bolts are a pain, you need a good swivel and a lot of leverage to get the plate off. The crank pully does not need to come off to get the belt out, and putting the new belt on is easy compared to removing it.
When you are uncomfortable with something, always defer to a good mechanic. There is no shame in that. They usually have better tools than the typical shade tree mechanic, just ask them to avoid using air tools while installing anything.
Klaus
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Always willing to listen, just not able to take direction.
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"Those 2 10mm bolts are a pain, you need a good swivel and a lot of leverage to get the plate off."
Thanks Klaus
I wriggled at it for ages. I turned it and it went a little way both sides but it becomes blocked. The pipe helps block it in there.
I have another question: When I look at getting the belt back on I wonder how it goes over the serpentine belt - it's like the magician putting a metal circle thru another metal circle ...
I want to do this job myself, if possible. But that protective metal semi-circle and pipe, and serp. belt make it seem impossible..
Thanks for help.
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The S belt comes off before you take off the T belt, then the T belt goes on before the S belt is replaced. There are no 'short cuts'.
Klaus
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Always willing to listen, just not able to take direction.
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Thanks, I really appreciate the advice.
I am confident now, just that timing protective cover. Can I clarify that that little semi-cirlcle cover behind crank will swivel or wiggle off, once the s. belt is off?
Thanks heaps
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If you think that the protective cover is hard to wiggle off, putting the belt on between the cam gears might prove to be a bit much. Both take a lot of patience and persuading.
Except for a little money, hiring a mechanic is not the end of the world. My first timing belt was done at Volvo.
Klaus
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Always willing to listen, just not able to take direction.
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My wife and I did it.
The only thing is, and I really didn't feel anything move, is that the exhaust pulley is one notch forward to the front. It seemed to happen when the belt got its teeth over fully it pulled it. But, the strange thing is the crank is advanced more than that! Like looks four teeth valleys out forward. But heck, I didn't pull on it and didn't feel it move. Besides, it took so much to move even with 31mm spanner effort.
However, if you didn't know the belt was done you wouldn't think there was any problem. (Actually, the drive may feel different to me, as though there is a some kind of afterburn happening, but, actually there is no tangible difference.) It might even run better.
My Q is: Can I re-do and turn back the exhaust pulley? So, do it all by hand and align again?
Also, how did movement happen in the first place? That crank pulley takes turning!
PS: Getting that serp. belt on, and the timing belt off was nuts. So, wife was great because she has the finger knack needed.
Time start: 4:40pm
Finish incl. test run: 7:30
PPS: Thanks Klaus.
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This must be your 1998 V70 you are working on, it is more forgiving than newer cars.
The crank and exhaust being off is not good. You are lucky that none of the valves are totally out of position. The timing marks MUST be aligned correctly after the tensioner is released.
In order to verify that valves and timing marks are OK, you are supposed to remove the spark plugs allowing the engine to rotate easily by hand. And rotate the crank at least 720 degrees (2 full turns), then re-check the timing marks.
The Tbelt needs to be very tight between the exhaust and intake cams, before you release the tensioner. Releasing the tensioner should not change the position of the exhaust cam.
The crank can easily move 3-4 teeth during the process because there is no compression. Care needs to be taken not to move it.
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Always willing to listen, just not able to take direction.
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Yoohoo
Followed your advice; It's done.
Problems (snags) I had were not knowing the tensioner well, so didn't immediately take off and put the belt on again, 'cause it took ages without realizing the tensioner capabilities in reducing adequate tension, and it was getting dark yesterday to enlist the wife to do it again.
Wow, the intake cam turns!
Not easily, but if you clasp your thumbs in there, into the pulley, and twist it will turn. The exhaust pulley on the other hand turns against perhaps valve pressure but it reverts to a seated position if you let it go. So, that's easier to manipulate as it finds it's own anti-tdc just by letting it go. My intake cams had moved suddenly when I was pulling the belt but I thought the sound was the belt snapping not the pulley turning hence my errors like that and the crank which must have moved as well.
It's all cool now.
So, thanks Klaus. Cheers.
Pretty fine engineering in these cars.
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posted by
someone claiming to be 02s80NO-T
on
Sat Mar 26 22:52 CST 2011 [ RELATED]
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Cam is variable on 2.9 S80 2002.
Past instructions from some sites shows dots on belt & tiny holes on Cam wheels, to align belt to cogs.
Not so on my new Volvo belt or cam cogs.
What is proper process to replace T-Belt, after I remove S-belt and old T-Belt?
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