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.
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Volvo 850, x70 oil cooler line block off testing in progress...
- rspi
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Volvo 850, x70 oil cooler line block off testing in progress...
'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
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Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
'98 S70 GLT, Lil' Red 25/32 mpg
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Re: Volvo 850, x70 oil cooler line block off testing in progress...
Very interesting. I wonder if there is a better aftermarket cooler that could be installed...
Eric
1998 Volvo V70 - rear-ended and totaled
2000 Volvo V70XC
2007 Volvo V50 T5 AWD M66
1998 Volvo V70 - rear-ended and totaled
2000 Volvo V70XC
2007 Volvo V50 T5 AWD M66
- erikv11
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Re: Volvo 850, x70 oil cooler line block off testing in progress...
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, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6
130k
gone: '96 NA 850 210k, '98 NA V70 182k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6

gone: '96 NA 850 210k, '98 NA V70 182k
- abscate
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Re: Volvo 850, x70 oil cooler line block off testing in progress...
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
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
- rspi
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Re: Volvo 850, x70 oil cooler line block off testing in progress...
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
'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
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Re: Volvo 850, x70 oil cooler line block off testing in progress...
Sounds like a good idea, as long as it doesn't restrict flow too much.
Eric
1998 Volvo V70 - rear-ended and totaled
2000 Volvo V70XC
2007 Volvo V50 T5 AWD M66
1998 Volvo V70 - rear-ended and totaled
2000 Volvo V70XC
2007 Volvo V50 T5 AWD M66
- rspi
- Posts: 7288
- Joined: Sat Nov 05, 2011 10:40 am
- Year and Model: 850 T-5R Wagon
- Location: Albuquerque, NM
- Has thanked: 24 times
- Been thanked: 51 times
Re: Volvo 850, x70 oil cooler line block off testing in progress...
'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
'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
- abscate
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Re: Volvo 850, x70 oil cooler line block off testing in progress...
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.
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
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
- bmdubya1198
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Re: Volvo 850, x70 oil cooler line block off testing in progress...
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.
00 V70R Venetian Red/Charcoal M56 Swapped 200k
03 S60 2.4T Silver/Black 118k
07 XC90 V8 AWD Sport Titanium Grey/Black 174k
92 245 Base White/Beige 249k
98 V70 GLT Black/Beige 205k
99 BMW 528i
84 BMW 318i
01 Mountaineer 5.0
Sold-
00 S70 GLT Mystic Silver/Taupe 253k
91 944 Turbo Dark Green/Beige 175k
93 944 Base Beige/Beige 221k
98 S90- Silver/Gray 207k
95 850 GLT Tropic Green... crushed
01 S60 2.4T Black/Black 230k
88 744 Turbo M46 Beige Metallic/Beige 188k
03 S60 2.4T Silver/Black 118k
07 XC90 V8 AWD Sport Titanium Grey/Black 174k
92 245 Base White/Beige 249k
98 V70 GLT Black/Beige 205k
99 BMW 528i
84 BMW 318i
01 Mountaineer 5.0
Sold-
00 S70 GLT Mystic Silver/Taupe 253k
91 944 Turbo Dark Green/Beige 175k
93 944 Base Beige/Beige 221k
98 S90- Silver/Gray 207k
95 850 GLT Tropic Green... crushed
01 S60 2.4T Black/Black 230k
88 744 Turbo M46 Beige Metallic/Beige 188k
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