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99 s70 died on highway : multiple codes Topic is solved

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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amblerman
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Re: 99 s70 died on highway : multiple codes  Topic is solved

Post by amblerman » Sun Jul 21, 2019 5:44 pm

btw. for my 1999 s70, I am using this serpentine belt routing. I lost my l diagram I drew when I first took it off to do my AC shim fix but I believe it's correct. Can someone confirm with more experience than I?

A lot of "s70 serpentine belt " searches show my the 850 and pre-99 routing and that's different.

Below is what I am using.

I have already taken my alt out again so I can't fire it up and watch the direction of spin but I believe this routing will spin my alternator counter clockwise. I verified that is correct with the arrow on my alternator.

And yes, I'm doing all this in my driveway with this wonderful 100 degree (38C ) heatwave we're having here in the eastern US so I almost can't even think straight right now.

-A
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abscate
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Re: 99 s70 died on highway : multiple codes

Post by abscate » Mon Jul 22, 2019 3:12 am

Yes. If you don’t have a tool use a strong cord and put the belt onto the ps pulley last, the bigger the pulley, the easier it is to slip a belt on it.

Or

Catch me on the drive by Tuesday with my AKN tool in the car.

:)


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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW

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amblerman
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Re: 99 s70 died on highway : multiple codes

Post by amblerman » Tue Jul 23, 2019 4:31 pm

I do have a nice serpentine belt tool now. I battled with using my breaker bar and actually ground down my torx socket because using the breaker bar with the socket was really too long.

When I did my AC shim fix job, I cursed enough times that I went and bought a proper thin serpentine belt tool. Makes a world of difference.
However, I had to buy a new T60 because now my ground down T60 was really too short now. Figures.

But the thin serpentine belt tool works so much better than my breaker bar did. The breaker bar was just too short (oddly enough) and too thick for the narrow clearances.

-A



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amblerman
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Re: 99 s70 died on highway : multiple codes

Post by amblerman » Mon Aug 05, 2019 12:00 pm

Here a quick update on this issue.
Car is back on the road. Here's what I did.
1) replaced all + battery cables. Did not resolve issue. I didn't think it was going to.. I replaced these because of so many people recommending doing this on a 20 year old volvo. I also realized that my positive battery terminal had already been replaced and I didn't like the style.

2) took alternator out and verified what I could. ie: diodes worked, no shorts, and slip rings* all passed tests.

3) got new voltage regulator.

That seemed to do the job. battery now reads 13.9 V while at idle so the alternator is putting out some juice.

The slip rings were less than ideal. At least one was.
brushslant.png
I posted this picture in another thread. As you can see, the brushes are of different length. However, the surprise was with the brush that is worn at an angle. I had noticed that when I took the regulator out but I didn't understand the full implications until I took apart my alternator.

it actually cut a sloped gouge into on of the slip rings. I don't like that. I have a new set of slip rings on order and will replace those in a couple of weeks. I'm getting good at taking the alternator out and apart.

Right now it works. The slip rings passed their continuity and resistance tests but they are definitely damaged.

I'll create a write up on that job.

But for me, what failed was my old voltage regulator/brush length.
-A
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dj_v70
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Re: 99 s70 died on highway : multiple codes

Post by dj_v70 » Mon Aug 05, 2019 1:17 pm

I had a similar problem with a 240 Volvo about 20 years ago. I had popped a diode somehow jumping a friends car (I even heard the loud pop as it blew). Alternator still seemed ok but I eventually ended up with slip ring wear like yours which someone told me was related. So, I replaced the diode and left the slip rings like that, just need to replace the regulator more often;)



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abscate
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Re: 99 s70 died on highway : multiple codes

Post by abscate » Mon Aug 05, 2019 2:12 pm

I'm getting good at taking the alternator out and apart.
You are hereby proclaimed Alternator TETRIS MASTER


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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW

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