IPD - Volvo Parts SpecialistsVolvo PartsVolvo Salvage: Used Volvo Parts and Over 50 Years ExperienceSouthern Vo Vo sells genuine used Volvo parts

Please use this Amazon link ... and help keep MVS on the Web. Thank you!Amazon.com

Advertise here via Google

Login

Not part of the forums? Register. It's free.

Need help? See our Help Page.

How does the oil cooler system work?

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

How does the oil cooler system work?

Postby ecbsykes » 21 Jun 2011, 15:47

I've had this question burning in my mind for a long time, and a recent thread has pushed me to figure it out. Can someone explain the entire system for me (and rest of the forum)?

What I know is this:

-There is the unit that is attached the the oil pan, and the two small hoses that go to it have coolant in them.
-Inside the oil pan are some tubes (not main pickup) that go somewhere containing what? coolant?
-Oil is pumped through two hoses to the radiator to be cooled, these contain oil, not coolant. Is this related to the oil cooler unit (with coolant) on the back of the pan?

Thanks!
Ed Sykes
2000 V70XC 2.4L Emerald Green 212,000 miles
User avatar
ecbsykes
Senior Forum Member
Senior Forum Member
 
Posts: 1363
Joined: 08 Mar 2009, 21:43
Model and Year: 2000 V70XC

Re: How does the oil cooler system work?

Postby mrscullini » 21 Jun 2011, 16:25

it appears the unit is a small heat exchanger. from what i can tell, oil is pumped through ports that are on the mating surface with the oil pan. see this link,

http://www.partsgeek.com/catalog/2001/v ... ooler.html

i'm hoping this is my problem. sure seems a lot easier to replace this than a head gasket. also, this seems like a more servicable design than the oil cooler integrated into the rad.
mrscullini
Forum Member
Forum Member
 
Posts: 225
Joined: 14 Nov 2006, 04:26
Location: Truckee, CA USA
Model and Year: 00 V70XC, 05 XC70

Re: How does the oil cooler system work?

Postby jimmy57 » 21 Jun 2011, 16:58

it is a parallel plate cooler. It is configured as though you took a radiator and sealed the finned area where air normally passes and pushed oil through the radiator. Of course, now the radiator coolant absorbs heat instead of giving up heat. The oil from oil pump passes through filter and then goes through oil cooler before returning to go to crank, cams, turbo.
The coolers integrated in tank of radiator work this way too with a little modification. Those have the oil going through a mini radiator that sits in the hot end of radiator. Auto trans cooler gets the cold end.
User avatar
jimmy57
Senior Forum Member
Senior Forum Member
 
Posts: 4593
Joined: 12 Nov 2010, 16:25
Location: Ponder Texas
Model and Year: 2004 V70R GT, et al

Re: How does the oil cooler system work?

Postby jblackburn » 21 Jun 2011, 17:04

Do these also have some sort of oil thermostat to control when oil does/doesn't go through the cooler like the 1998-earlier models do?
'98 S70 T5 218K miles
2012 Chevy Cruze LT 6MT


A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!
User avatar
jblackburn
MVS Moderator
MVS Moderator
 
Posts: 13631
Joined: 08 Jun 2008, 21:54
Location: Alexandria, VA
Model and Year: 1998 S70 T5

Re: How does the oil cooler system work?

Postby fields 100 » 01 Nov 2011, 01:28

jimmy57 wrote:it is a parallel plate cooler. It is configured as though you took a radiator and sealed the finned area where air normally passes and pushed oil through the radiator. Of course, now the radiator coolant absorbs heat instead of giving up heat. The oil from oil pump passes through filter and then goes through oil cooler before returning to go to crank, cams, turbo.
The coolers integrated in tank of radiator work this way too with a little modification. Those have the oil going through a mini radiator that sits in the hot end of radiator. Auto trans cooler gets the cold end.

So, if this is closed, no fins exchanger, the oil, in the beginning of the engine operation, is being warmed up (not cooled) by the coolant which heats up much faster than the engine oil. The thermostat, I believe, is just a plunger and a spring, that allows the oil circulate through the heat exchanger while it is cold and thick, and then, when the oil loses some viscosity during warm up, the plunger closes and there is no more circulation through that heat exchanger in the radiator. I think it makes sense as it keeps condensation from the intercooler down to the minimum during short urban trips in the cool weather.Just my theory.Any opinions?
User avatar
fields 100
Forum Member
Forum Member
 
Posts: 150
Joined: 19 Mar 2011, 12:33
Location: illinois
Model and Year: s 60 T-5


Return to Volvo 850, S70, V70, C70 & V70-XC Forum (1992-2000)

Who is online

Users browsing this forum: avdlee, Bing [Bot], dariovolvo, Google Adsense [Bot], kalleanka123, rspi, tryingbe and 102 guests