Amazon Black Friday deals
IPD sale XeMODeX - Experts in Volvo Electronics

Get email notification of topic replies. Log in or register (free). Amazon Link Buy anything with this and it helps MVS!

Does the coolant lubricate the water pump?

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

Post Reply
Richard99
Posts: 130
Joined: Tue May 22, 2018 2:45 pm
Year and Model: 2000 V70XC
Location: San Francisco
Has thanked: 24 times
Been thanked: 12 times

Does the coolant lubricate the water pump?

Post by Richard99 »

Curious if the coolant lubricates the water pump on these cars? I had an incident where I was low on coolant, so I fixed the issue, refilled the coolant, and there was a horrible screeching sound for about 20 seconds that gradually went away.

Eric
Eric

1998 Volvo V70
2000 Volvo V70XC
User avatar
erikv11
Posts: 10040
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 124 times
Been thanked: 348 times

Re: Does the coolant lubricate the water pump?

Post by erikv11 »

No. The bearing around the water pump shaft is sealed, if coolant comes in contact with the bearing it will actually ruin it by stripping out the grease.

The coolant can help to cool the bearing I suppose, but not to lubricate it.

I don't know how to explain the screeching.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k
jimmy57
Posts: 6670
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 4 times
Been thanked: 275 times

Re: Does the coolant lubricate the water pump?

Post by jimmy57 »

Spilled coolant will make the belt squeal
User avatar
MoVolvos
Posts: 2703
Joined: Sun Jan 15, 2012 6:47 pm
Year and Model: 03S80T6~08C30T5
Location: NC
Has thanked: 43 times
Been thanked: 98 times

Re: Does the coolant lubricate the water pump?

Post by MoVolvos »

jimmy57 wrote: Mon Oct 19, 2020 10:37 pm Spilled coolant will make the belt squeal
I thought by adding moisture to a worn dry or loose belt provided friction so it's one of the methods to test / eliminate a squeaking belt. It could also be a coincidence but he could spray some 303 to soak the belt for a day and it should not come back, unless; the idler bearing is starting to go, belt is loose, worn or both or worse case the water pump is starting to go.

https://www.amazon.com/30340CSR-Protect ... r=8-2&th=1

*
Blessings,

BKM

1998 S70 T5 - Donated
2003 S80 T6
2003 GS300
2003 Odyssey
2008 C30 T5
2019 Atlas SE 4 Motion
User avatar
Eddystone
Posts: 389
Joined: Mon Jan 20, 2014 4:30 pm
Year and Model: 1967 Ford GT40 Mk IV
Location: Philadelphia Metro Area
Has thanked: 33 times
Been thanked: 28 times

Re: Does the coolant lubricate the water pump?

Post by Eddystone »

Richard99 wrote: Mon Oct 19, 2020 7:47 pm Curious if the coolant lubricates the water pump on these cars? I had an incident where I was low on coolant, so I fixed the issue, refilled the coolant, and there was a horrible screeching sound for about 20 seconds that gradually went away.

Eric
I just installed an Aisin (?) (volvo) water pump. In the box was a prominently printed note warning you NOT to rotate the impeller without coolant in there to lubricate things. So, the bearing itself is sealed, but the tolerances are so close (at least on the OEM pump) that the impeller will score the casting. Note says that if you score the casting, the pump could make a high pitched noise forever after. Just reporting what was in the box.
1998 V70 Non-Turbo/Auto
1993 945 Turbo/Auto
1999 S70 T5 Turbo/Auto
All U.S. market models.
All on the road and running.
PM me if you are near Philadelphia.
;-)
User avatar
erikv11
Posts: 10040
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 124 times
Been thanked: 348 times

Re: Does the coolant lubricate the water pump?

Post by erikv11 »

Good info Eddystone thanks!
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k
User avatar
misha
Posts: 4537
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 63 times
Been thanked: 166 times

Re: Does the coolant lubricate the water pump?

Post by misha »

Eddystone wrote: Tue Oct 20, 2020 3:30 pm ...I just installed an Aisin (?) (volvo) water pump. In the box was a prominently printed note warning you NOT to rotate the impeller without coolant in there to lubricate things. So, the bearing itself is sealed, but the tolerances are so close (at least on the OEM pump) that the impeller will score the casting. Note says that if you score the casting, the pump could make a high pitched noise forever after. Just reporting what was in the box.
That note is also present in SKF water pump box.
'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
abscate
MVS Moderator
Posts: 23189
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 411 times
Been thanked: 1267 times

Re: Does the coolant lubricate the water pump?

Post by abscate »

Vida solution for squealing water pump is “remove sus scrofa”

Outside Don Beyer Volvo in VA
Attachments
0543C10A-7638-448A-847D-8F4B095433A8.png
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
User avatar
Sveedy
Posts: 340
Joined: Mon Nov 11, 2019 4:52 pm
Year and Model: 96 850 Turbo
Location: N. Arizona
Has thanked: 42 times
Been thanked: 45 times

Re: Does the coolant lubricate the water pump?

Post by Sveedy »

Many years ago I worked for a general engineering contractor who had 55gal drums of water soluble oil that they used in their heavy equipment. We used a little bit in our personal vehicles as well. Seems like it would make sense on a couple if levels; maybe less corrosion.
Try to learn life's bad lessons vicariously through others.
Post Reply
  • Similar Topics
    Replies
    Views
    Last post