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'98 S70 T5 Bad Alternator. Voltage Regulator?

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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SleeStak69
Posts: 31
Joined: 16 July 2016
Year and Model: 1998 S70 T5 5MT
Location: Washington State

'98 S70 T5 Bad Alternator. Voltage Regulator?

Post by SleeStak69 »

(Voltage Regulator) I watched this video after having a bad alternator confirmed by a test done at O'reillys. My only concern is that my alternator SMELLS bad and also makes a noise when I start the car up cold for about 10 seconds. Could it still be the regulator or will I have to shell out for the big money big project for a whole new alternator?
Pewter Silver Metalic 1998 S70 T5 5 Speed 8)

Herb Goltz
Posts: 193
Joined: 15 June 2011
Year and Model: 04& 06 XC70, '12 s60
Location: Aurora, ON, Canada
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Post by Herb Goltz »

If it smells bad and makes noise you need a complete rebuild, not just a voltage regulator. Look for a local place that does rebuilds-- the parts store rebuilds are hit or miss...
2012 s60 t5
2006 XC70
2004 XC70

SleeStak69
Posts: 31
Joined: 16 July 2016
Year and Model: 1998 S70 T5 5MT
Location: Washington State

Post by SleeStak69 »

That is what I was thinking would be the case
Pewter Silver Metalic 1998 S70 T5 5 Speed 8)

jenkinskg
Posts: 238
Joined: 3 July 2015
Year and Model: 04 c70 hpt 98 s70 xc
Location: United States
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Post by jenkinskg »

So on my 04 c70 rebuild on the car is possible, but not fun, I did this since removing alternator is a not so fun task, mine was running low voltage 13.3 or lower so I put it off for a while. Here is what I did on car
The attched video allowed me to see what screws are needed to be removed.
A right angle screw driver will help with access.
I had to lossen the cooling fan and remove some inter-cooler hoses and lower rock guard.
I was able to not drain antifreeze or pull serpentine belt.
Sorry I did not make a video.

The regulator cost me $31 last year, price has come down, so I have original alternator, not a chinese autozone alternator for $31

here is same ebay seller and current listing for regulator with new brushes.

http://www.ebay.com/itm/VOLVO-Voltage-R ... SwZd1VasA1

The only shorcut I too was I left off the plastic cover off of the rear, its screw was the hardest of all of them.
2004 c70 2.3HPT, s60 2.5T

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bmdubya1198
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Post by bmdubya1198 »

If it's just the voltage regulator, it wouldn't smell bad. The bearings are probably shot... time for a new alternator.
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jenkinskg
Posts: 238
Joined: 3 July 2015
Year and Model: 04 c70 hpt 98 s70 xc
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Post by jenkinskg »

Blown diodes can smell, or burt regulator.
Electronics smell when overloaded or dead
2004 c70 2.3HPT, s60 2.5T

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