IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

Volvo 850, x70 oil cooler line block off testing in progress...

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

User avatar
rspi
Posts: 7278
Joined: Sat Nov 05, 2011 10:40 am
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Has thanked: 22 times
Been thanked: 49 times
United States of America
rspi

Volvo 850, x70 oil cooler line block off testing in progress...

Post by rspi » Wed Apr 15, 2020 9:45 am

Hi guys, a year or so ago I was purchasing a seal for my daughter's oil thermostat from a trusted Volvo mechanic shop and the owner instructed me to block it off. I was shocked and immediately asked my mechanic in FL what he thought about it and he said that's one of the first things he does after getting a P80a vehicle (N engine). They claim that the oil cooler is more of an oil heater, not very effective as a cooler.

So, over the past year I have blocked off many of them with the NA plate. No issues that I know of yet. I have decided to test my daily driver in two ways:
1. Test the temp while driving.
2. Have an oil analysis done after 5,000 miles before and after the block off.

Today I will be installing an oil temp gauge with the sensor in the oil drain plug. I'm going to run this for 2500 miles with the oil cooler installed. Then I'm going to block off the oil cooler and run it another 5,000 miles checking the temperature highs, etc.

After each oil change I will be sending the oil to be sampled at Blackstone Labs. The lab results will tell if there is an issue with oil deterioration.

The newer RN oil pan has a better system that is believed to be more effective.
These users thanked the author rspi for the post:
erikv11
'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

Richard99
Posts: 95
Joined: Tue May 22, 2018 2:45 pm
Year and Model: 2000 V70XC
Location: San Francisco
Has thanked: 18 times
Been thanked: 6 times
United States of America
Richard99

Re: Volvo 850, x70 oil cooler line block off testing in progress...

Post by Richard99 » Wed Apr 15, 2020 11:43 am

Very interesting. I wonder if there is a better aftermarket cooler that could be installed...
Eric

1998 Volvo V70
2000 Volvo V70XC

User avatar
erikv11
Posts: 9667
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 94 times
Been thanked: 276 times
United States of America
erikv11

Re: Volvo 850, x70 oil cooler line block off testing in progress...

Post by erikv11 » Wed Apr 15, 2020 12:02 pm

Richard99 wrote: ↑
Wed Apr 15, 2020 11:43 am
Very interesting. I wonder if there is a better aftermarket cooler that could be installed...
The newer oil pan (99+) with the biscuit oil cooler on the side of the pan is the easiest plug-and-play substitute. People have been doing that for years.
'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, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

User avatar
abscate
MVS Moderator
Posts: 21059
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 316 times
Been thanked: 979 times
Trinidad & Tobago
abscate

Re: Volvo 850, x70 oil cooler line block off testing in progress...

Post by abscate » Wed Apr 15, 2020 1:02 pm

That reminds me to get rid of my crappy hose clamps on my biscuit oil cooler during CovidMaintenance
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
rspi
Posts: 7278
Joined: Sat Nov 05, 2011 10:40 am
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Has thanked: 22 times
Been thanked: 49 times
United States of America
rspi

Re: Volvo 850, x70 oil cooler line block off testing in progress...

Post by rspi » Wed Apr 15, 2020 8:25 pm

Richard99 wrote: ↑
Wed Apr 15, 2020 11:43 am
Very interesting. I wonder if there is a better aftermarket cooler that could be installed...
I'm sure it can be done, stand alone, like people do for the transmission.
'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

Richard99
Posts: 95
Joined: Tue May 22, 2018 2:45 pm
Year and Model: 2000 V70XC
Location: San Francisco
Has thanked: 18 times
Been thanked: 6 times
United States of America
Richard99

Re: Volvo 850, x70 oil cooler line block off testing in progress...

Post by Richard99 » Thu Apr 16, 2020 12:22 am

rspi wrote: ↑
Wed Apr 15, 2020 8:25 pm
Richard99 wrote: ↑
Wed Apr 15, 2020 11:43 am
Very interesting. I wonder if there is a better aftermarket cooler that could be installed...
I'm sure it can be done, stand alone, like people do for the transmission.
Sounds like a good idea, as long as it doesn't restrict flow too much.
Eric

1998 Volvo V70
2000 Volvo V70XC

User avatar
rspi
Posts: 7278
Joined: Sat Nov 05, 2011 10:40 am
Year and Model: 850 T-5R Wagon
Location: Albuquerque, NM
Has thanked: 22 times
Been thanked: 49 times
United States of America
rspi

Re: Volvo 850, x70 oil cooler line block off testing in progress...

Post by rspi » Sat Apr 18, 2020 10:27 am

'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

JimBee
Posts: 1755
Joined: Tue Dec 09, 2008 9:23 pm
Year and Model: 93 and 2 96 850's
Location: Minneapolis
Has thanked: 13 times
Been thanked: 25 times
United States of America
JimBee

Re: Volvo 850, x70 oil cooler line block off testing in progress...

Post by JimBee » Sat Apr 18, 2020 9:06 pm

Thanks, rspi for doing this analysis. I look forward to what your results!

User avatar
abscate
MVS Moderator
Posts: 21059
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 316 times
Been thanked: 979 times
Trinidad & Tobago
abscate

Re: Volvo 850, x70 oil cooler line block off testing in progress...

Post by abscate » Sun Apr 19, 2020 4:56 am

Both my parts 1998 NA and my 1999 NA have no oil thermostat nor cooler of either kind.

Only my 1999 turbo has one

I think my 2005 NA has a biscuit oil cooler.
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
bmdubya1198
Posts: 3946
Joined: Tue Dec 30, 2014 10:45 am
Year and Model: 2K V70R M56
Location: Charlotte, NC
Has thanked: 43 times
Been thanked: 154 times
United States of America
bmdubya1198

Re: Volvo 850, x70 oil cooler line block off testing in progress...

Post by bmdubya1198 » Sun Apr 19, 2020 8:47 am

Not only is the oil to water oil cooler a better design, the lines aren't as much of a pain to install. And they don't leak as often! I'm interested to see the results of running without one. Due to the design of the -'98 oil cooler, I couldn't imagine that it does too much.
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
2006 BMW 330i
1999 BMW 528i
Sold-
2000 S70 GLT Mystic Silver/Taupe 253k
1993 944 Base Beige/Beige 221k
1998 V70 GLT Black/Beige 199k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k

Post Reply
  • Similar Topics
    Replies
    Views
    Last post