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Timing belt - missing tensioner?

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
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1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
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KHolden
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Joined: Wed Mar 11, 2015 4:49 pm
Year and Model: 1998 V70 GLT
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Timing belt - missing tensioner?

Post by KHolden »

So I'm at 160k on my 1998 V70 GLT and decided its a good time to replace the timing belt and water pump. Got the kit, cracked it open, went to remove the hydrolic tensioner and much to my surprise there wasn't one. Was there a change made to the tensioner system or have I been driving around with my timing belt flapping in the wind for the last 7 years?



Sorry for the potato quality image.
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misha
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Re: Timing belt - missing tensioner?

Post by misha »

Yes....i think that '98 got mechanical tensioner.
Proper picture would be nice too.
If water pump is original and not leaking...leave it alone.

Also...if you got a Hepu for a replacement....i wouldn't bother to install it.
Last edited by misha on Wed May 06, 2020 4:21 pm, edited 1 time in total.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
KHolden
Posts: 16
Joined: Wed Mar 11, 2015 4:49 pm
Year and Model: 1998 V70 GLT
Location: Denver
Has thanked: 3 times

Re: Timing belt - missing tensioner?

Post by KHolden »

Ok, learned somethin new - all the vids I've watched had the hydraulic tensioner. And yea, potato quality was because all I was intending to show was the giant gap where I had expected to find the hydraulic tensioner.

Thanks... I'm off now to become a youtube expert on mechanical tensioners! (What could possibly go wrong?)
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misha
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Re: Timing belt - missing tensioner?

Post by misha »

I never messed with mechanical tensioner because i don't want to ruin something bacause of improper tension.

Hydraulic ones are so simple....no adjusting needed.

Just came across this...might be helpfull:
https://www.underhoodservice.com/volvo- ... tensioner/
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
KHolden
Posts: 16
Joined: Wed Mar 11, 2015 4:49 pm
Year and Model: 1998 V70 GLT
Location: Denver
Has thanked: 3 times

Re: Timing belt - missing tensioner?

Post by KHolden »

You're filling me with confidence...

Here's a proper shot from above of the "mechanical" tensioner.

Richard99
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Re: Timing belt - missing tensioner?

Post by Richard99 »

I actually prefer the mechanical tensioner. It is much quicker to use an adjust, and it has the added advantage that you don't need to completely remove it to make the adjustments. It is very easy. There are several YouTube videos demonstrating how to set the tension.
Eric

1998 Volvo V70
2000 Volvo V70XC
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misha
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Year and Model: '97 850 2.5 20v
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Re: Timing belt - missing tensioner?

Post by misha »

Yes....mechanical one.
Tensioner change from hydraulic to mechanical was somewhere in '98 from specific engine serial number and was continued to use afterwards in later models.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
KHolden
Posts: 16
Joined: Wed Mar 11, 2015 4:49 pm
Year and Model: 1998 V70 GLT
Location: Denver
Has thanked: 3 times

Re: Timing belt - missing tensioner?

Post by KHolden »

misha wrote: Wed May 06, 2020 4:01 pm If water pump is original and not leaking...leave it alone.
I've been occassionally hearing a "groan" noise from the passenger side when the car is in motion but not yet warmed up. I was concerned the water pump might be failing...

Water pump is Aisin btw. Timing belt is OEM.
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misha
Posts: 4540
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
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Re: Timing belt - missing tensioner?

Post by misha »

Richard99 wrote: Wed May 06, 2020 4:23 pm I actually prefer the mechanical tensioner. It is much quicker to use an adjust, and it has the added advantage that you don't need to completely remove it to make the adjustments. It is very easy. There are several YouTube videos demonstrating how to set the tension.
Lots of reports of failed mechanical tensioner(INA which is oem) before service schedule,while hydraulic ones never fails.

There is one report that plastic spacer felt of hydraulic tensioner causing the belt to jump.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
User avatar
misha
Posts: 4540
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 64 times
Been thanked: 167 times

Re: Timing belt - missing tensioner?

Post by misha »

KHolden wrote: Wed May 06, 2020 4:29 pm
I've been occassionally hearing a "groan" noise from the passenger side when the car is in motion but not yet warmed up. I was concerned the water pump might be failing...

Water pump is Aisin btw. Timing belt is OEM.
Before it fails...it starts to leak from the weep hole.
Since you got Aisin pump....go ahead.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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