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Water pump -- ez? 98 S70

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

mar601
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Water pump -- ez? 98 S70

Post by mar601 » Sat Jan 04, 2020 8:25 am

I'm having the timing belt replaced and the water pump is only 63 bucks (156K on car). When they do the belt, does it add much to labor cost to replace the water pump while they're in there? Anything else I would be smart to replace while they're doing the belt job? (I did get the new tensioner as well). THANKS much for this forum.

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amblerman
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Re: Water pump -- ez? 98 S70

Post by amblerman » Sat Jan 04, 2020 10:51 am

It will not add much labor cost to the job. However the consensus on this board is that the brand of the water pump is extremely important with most people recommending an Aisin brand pump (Aisin makes the actual volvo part as well. )

Your mechanic might be able to get an Aisin pump for $63 but probably not as he/she probably adds a few $ onto their cost of the pump.
Therefore you're probably getting a $50-55 water pump plus extra $ for your mechanic ordering/handling parts.
$50 probably it isn't an aisin pump.

The other costs for that job will be labor + coolant as removing the water pump dumps all the coolant.


You can see all the potential parts that COULD be easily replaced when doing this job here: (Note Up To Engine Serial Number -1266127 (See Sticker on Timing Cover) )
https://www.fcpeuro.com/products/volvo- ... 252wp-oega

You mentioned a new tensioner.. If your engine serial number is up to 1266127, the tensioner is really two pieces: the hydraulic tensioner and the pulley arm that the tensioner applies pressure to and actually rides on belt.

In picture below:
green arrow = water pump
red arrow = idler pulley
yellow arrow = hydraulic tensioner (ie what applies tension)
purple arrow = the pulley that applies tension to the belt.
belt with teeth = timing belt
belt without teeth = serpentine belt (drives alternator, AC, power steering)
98timing.png
You do NOT have to replace the serpentine belt as part of a timing belt job. It was just in the picture.

If your serial number is after 1266127 then you have a different tensioner as shown in next picture:
timing2.png
red arrow = mechanical tensioner
purple arrow = idler pulley

If I had your car and I was doing the timing belt job at 156K and 21 years, I'd replace all the parts I mentioned except the serpentine belt and not worry for another about it for another 100K. (or remaining life of car).

Some folks on this board may recommend leaving your water pump alone if it's original, not leaking, have had proper coolant changes, are using proper coolant and your cooling system is in proper condition. But at 156K and 21 years old I'd be tempted to change it personally..

If you want to see the whole job and parts: (Note this is on an engine with hydraulic tensioner)


Note: In this video, he makes mention of a Hepu branded water pump. That is/was a brand people also recommended. I have no experience with that brand. It is cheaper than the Aisin. If you get an Aisin pump, you can see an area on the pump where they ground off the Volvo name. I do not think Hepu is an OEM supplier to Volvo for water pumps.

(edited to highlight difference between hydraulic vs mechanical tensioner
-A
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Last edited by amblerman on Mon Jan 06, 2020 7:36 pm, edited 1 time in total.

mar601
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Re: Water pump -- ez? 98 S70

Post by mar601 » Sat Jan 04, 2020 11:40 am

Wow -- many thanks for that. Yes FCP has that pump and I'll make sure I replace all you've shown. Really appreciate that !

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Re: Water pump -- ez? 98 S70

Post by jreed » Sat Jan 04, 2020 12:19 pm

For what it's worth, I waited until 180K/19 years to replace the water pump, and it looked pretty good after all those miles and years -- no leaks or wear marks. Removing the gasket residue was difficult. I used an Aisin pump for the replacement, new Volvo bolts, and I used a small amount of Permatex water pump gasket RTV to help seal it up. My plan is to replace the water pump at every other timing belt change.
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

cn90
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Re: Water pump -- ez? 98 S70

Post by cn90 » Mon Jan 06, 2020 6:32 pm

At 150K-160K, i'd do the whole thing:

- Aisin WP. I believe the Aisin WP comes with the green gasket.
I clean the mating surfaces really well with steel wool.
I use a bit of grease on the gasket just to help it stick.

- TB kit is about $120. Use only Volvo or Conti brand.
The TB kit includes:
* TB itself
* Idler Pulley
* Tensioner Pulley
* Hydraulic vs Mech Tensioner...Someone told me 1998 is a split year when it comes to Hydraulic vs Mech Tensioner issue.

Info in forum...

Labor is about 3h.
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+

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amblerman
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Re: Water pump -- ez? 98 S70

Post by amblerman » Mon Jan 06, 2020 7:29 pm

Oh Geez, you're right.. the Hydraulic vs mech tensioner did happen around 98. I always assumed it was 99 and on got the mechanical.


According to FCP's page, the hydraulic is good "Up To Engine Serial Number -1266127 (See Sticker on Timing Cover) "
Mechanical was after that engine number

OP, check your engine number and/or look on your current engine to see if you have the hydraulic (probably visible through passenger side wheel well) or mechanical (have to take off plastic engine side cover.

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