'98 V70 Serpentine Belt Tensioner Rattle

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1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
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bmdubya1198
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'98 V70 Serpentine Belt Tensioner Rattle

Post by bmdubya1198 »

May be a stupid question, but I always figured this is an issue that would have been solved by replacing the tensioner. I'll make it quick and to the point...
When I rev the engine, the serpentine belt tensioner rattles and makes a noticeable noise. It's most noticeable when the engine is cold, I don't think it does it when warm. I noticed that's what the noise was when I looked at the tensioner while revving the engine with the throttle pulley.
As soon as the RPM starts to raise, the tensioner has a quick rattle back and forth, then it tightens up like it should. Is this normal, or do I just keep getting "lucky" with my junkyard tensioners?
I got my current Meyle tensioner from the junkyard a couple weeks ago. It was only $15 and it has a 2013 date code on it, so I figured why not. The pulley feels good and the spring is nice and tight. I guess it's just not tight enough.
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scot850
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Post by scot850 »

Sorry our friend, but sounds like a bad tensioner spring.

Neil.
2000 V70 R - still being an endless PITA
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Post by bmdubya1198 »

scot850 wrote: Mon Sep 11, 2017 3:30 pm Sorry our friend, but sounds like a bad tensioner spring.

Neil.
That's what I'm thinking as well. 3 tensioners later... :x
00 V70R Venetian Red/Charcoal M56 Swapped 202k
03 S60 2.4T Silver/Black 122k
07 XC90 V8 AWD Sport Titanium Grey/Black 180k
92 245 White/Beige 249k
98 V70 GLT Black/Beige 205k
00 S70 GLT Mystic Silver/Taupe 254k
99 BMW 528i
84 BMW 318i
04 Saab 9-5 Aero
01 Mountaineer 5.0- to tow all these cars
Sold-
91 944 Turbo
93 944
98 S90
95 850 GLT
01 S60 2.4T
88 744 Turbo M46

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Post by scot850 »

Buy a new one! I know they can be expensive, but if you have fitted x 3 PnP items and they all fail then I would buy a new one as the time and risk of another used one failing and throwing the serpentine belt is not worth it. I have read of the belts failing and smashing the timing belt cover and taking out the timing belt = Engine.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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Post by bmdubya1198 »

Ouch, that's pretty bad!
I've planned on buying a new one anyway, I figured I'd give it another shot with the used one since I found a like-new Meyle, but it turns out after 4 years, the spring is just as bad as the 20 year old Volvo tensioner. Which is strange, it was a b**ch to get it to release all the way for me to get the belt on!
00 V70R Venetian Red/Charcoal M56 Swapped 202k
03 S60 2.4T Silver/Black 122k
07 XC90 V8 AWD Sport Titanium Grey/Black 180k
92 245 White/Beige 249k
98 V70 GLT Black/Beige 205k
00 S70 GLT Mystic Silver/Taupe 254k
99 BMW 528i
84 BMW 318i
04 Saab 9-5 Aero
01 Mountaineer 5.0- to tow all these cars
Sold-
91 944 Turbo
93 944
98 S90
95 850 GLT
01 S60 2.4T
88 744 Turbo M46

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Post by loveMy850 »

By holding it in your hand how can you tell if the tensioner spring is good or bad? Thanks

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Post by bmdubya1198 »

loveMy850 wrote: Mon Sep 21, 2020 1:12 pm By holding it in your hand how can you tell if the tensioner spring is good or bad? Thanks
You can get a general idea of the condition by trying to compress it. If it's easy to compress, it's likely bad. The spring should have a lot of tension.
00 V70R Venetian Red/Charcoal M56 Swapped 202k
03 S60 2.4T Silver/Black 122k
07 XC90 V8 AWD Sport Titanium Grey/Black 180k
92 245 White/Beige 249k
98 V70 GLT Black/Beige 205k
00 S70 GLT Mystic Silver/Taupe 254k
99 BMW 528i
84 BMW 318i
04 Saab 9-5 Aero
01 Mountaineer 5.0- to tow all these cars
Sold-
91 944 Turbo
93 944
98 S90
95 850 GLT
01 S60 2.4T
88 744 Turbo M46

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Post by loveMy850 »

The used one it's very tight, but can you give me a short write up on the pin thing, what about the used one,now how's that supposed align? I can't find a tutorial,and it's not in my Haynes or my chiltons.Never done this before.I'm a little stumped.

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bmdubya1198
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Post by bmdubya1198 »

You mean the pin hole to hold the tensioner in its released position? You can just compress it, then slip anything through there that fits, like an allen key.
00 V70R Venetian Red/Charcoal M56 Swapped 202k
03 S60 2.4T Silver/Black 122k
07 XC90 V8 AWD Sport Titanium Grey/Black 180k
92 245 White/Beige 249k
98 V70 GLT Black/Beige 205k
00 S70 GLT Mystic Silver/Taupe 254k
99 BMW 528i
84 BMW 318i
04 Saab 9-5 Aero
01 Mountaineer 5.0- to tow all these cars
Sold-
91 944 Turbo
93 944
98 S90
95 850 GLT
01 S60 2.4T
88 744 Turbo M46

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Post by abscate »

You could use a torque wrench to measure the spring tension and quantify the result
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