So I have a 99 S70 GLT with 89k and the Timing belt tensioner pulley bearing went out. Bent all my valves and made contact marks on my pistons... Sounds like the Pully should have been replaced a lot earlier than you are indicating.

 

I suggest at 70K. Volvo suggests at 80K

 

Just curious if the 700 to 800 estimate is a dealer cost or a non-dealer cost for the timing belt replacement.

 

I would like to add one tip to this thread for the non-turbo S70s.

The tensioner on these is spring loaded and if you follow the instructions in VIDAS you will ALWAYS be off one tooth on the crank gear.

The trick is to intentionally be off one tooth (anti-clockwise) so you end up okay once you turn the crank slightly and pull the belt tight on the idler pulley side.

I just did this service as part of an engine swap. It was a total PITA with a pulled engine. In car, I would have beaten the car with a 2x4 cause it would have been nearly impossible to do properly as per VIDAS.

 

If you leave all the marks on and ignore Vadis on this step it will line up perfect.

 

hey im about to do my timing belt on my 98 s70 t5, i was thinking of purchasing the kit they have on ipd. they sell a cam locking tool also. do you think that is necessary or a waste of money?

 

IMO Cam tool waste of $$$$.

 

alright thanks you just saved me 30 dollars.

 

Glad to help.

 

So, is there a link for instructions on replacing all of this timing belt stuff for the S70? I was looking under my daughter's hood while she was home for Thanksgiving and noticed that her cerpentine belt was cracking. So I figured it's best to be safe and replace all of this stuff since we purchased the car 9 months ago.

And I believe the car has about 145,000 on it so I guess it would be best to replace the water pump as well???

Did I read right? The tentioners should be replaced EVERY TIME? I don't think they were on my 850, and they are 15 year old.

 

I would change the pulleys everytime.

Not sure if there is a link I am going to try to scan a walk though and post it when I get the desktop PC up and running again.

 

Thanks for the great post.
When I bought my V75, the serpentine belt looked exactly like your last picture. I replaced it right away.
By John,

 

I have a question. My 1998 V70 now has 100K miles.
At 60K miles (in 2004), I changed the following:
- TB (Continental brand).
- Hydraulic Tensioner (#3)
- I did NOT change the pulleys (#4 and #6).

Questions if I replace the TB again in the near future:

1- Cam Seals x 2: when to replace them?
2- Crank seal x 1: when to replace them?
3- Water Pump: when to replace them?
4- Pulleys #4 and #6: when to replace them?
5- Hydraulic tensioner: replace every 70K miles?

http://www.eeuroparts.com/Main/PartsResults.aspx

 

If the seals are not leaking leave them alone.
Water pump I always inspect. If it is leaking I replace. Some will do it when they do the belt. The job is so easy for me if it leaks I can swap it out quick.
I would do the pulleys this time. Most likely in borrowed time already.
The hydraulic tensioner every 2 to 3 belts. I also inspect them good if it is wet by the shaft of the tensioner then replace it.

 

Couple questions for my 1998 V70:

1. In your experience, how long do the pulleys last? 100K, 120K, 140K?
2. The tensioner, how long does it last? 100K, 120K, 140K?

Thanks!

 

The tensioner usually about 140K or more.
The pulleys I try to change every 70K because if you look closely you will see the grease coming out of the seal. I have seen them fail at 80K and other fail at 150K. That is why I just replace them at 70K.

 

The S90 I recently did a timing belt on- its first one- had an almost completely seized idler pulley. it was very hard to turn. Remember- on its first timing belt change. Granted, the car has 107,000 miles on it, but that still tells me, loud and clear, that the tensioner and idler need to be changed every time. The S90 timing components are essentially the same as for the S70, aside from longer, wider belt, stronger tensioner, and bigger cam/ crank sprockets, so if an S90 can have a seized pulley that early, so can the smaller Volvos.

 

In your experience, WHEN do the Cam Seals x2 and Crank Seal Leak?

The reason is that I want to do the WHOLE thing when I get in that area! (I hate "redo"!!!).

 

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They usually don't leak that early on, unless the PCV system causes them to blow out.

 

I thought this is a nice addition to tons of DIYs on the Internet.

Very well written for 850:
http://www.autorepairdb.com/volvo/850/timingbelt1.html