oil in coolant

Bits · Nov 23rd, 2020, 11:21

I have a 2006 D5 xc90. The coolant has oil in it where do I find the oil cooler please?

Tannaton · Nov 23rd, 2020, 12:03

The oil cooler is bolted to the rear of the sump but they normally don't give trouble.

Are you sure it's engine or rather than gearbox oil - there is a gearbox oil heat exchanger within the radiator and that's more likely to be your culprit.

Fika · Nov 23rd, 2020, 13:00

If the latter is the case, what could that.mean for the transmission? I always thought the cooling system had high pressure when hot..

john.wigley · Nov 23rd, 2020, 13:14

If 'Tannaton' is right and it is a similar system to the 7 series automatic cars, 'Fika', you need to act quickly. I had the same problem with my 745 when the oil cooler failed internally and allowed cross contamination of the fluids. It meant a new rad along with several flushes of the cooling system and transmission. I was lucky; I caught mine early and there was no lasting damage - let's hope yours is the same.

Regards, John.

Clan · Nov 23rd, 2020, 13:16

Quote:

Originally Posted by Fika

If the latter is the case, what could that.mean for the transmission? I always thought the cooling system had high pressure when hot..

It has and it is higher pressure than the oil return to the gearbox which goes through the cooler .. I have come across a couple of engine oil cooler leaks over the years is the oil in the coolant black or browny red?

Bits · Nov 23rd, 2020, 19:43

Browny red

https://www.volvoforums.org.uk/attac...1&d=1606160804

If it's the transmission oil - the gearbox is fooked anyway.

Bits · Nov 24th, 2020, 18:14

So engine or gearbox oil please?

john.wigley · Nov 24th, 2020, 18:32

If it is browny-red, it is most likely to be ATF, which starts life bright red, 'Bits'. J.

Mike A · Nov 24th, 2020, 19:28

You maybe lucky ...sirrob on u tube came across this believe he did flushing of systems and succeeded check it out but do not drive anymore ....good luck

paddy74 · Nov 24th, 2020, 20:28

^^ to make that a little clearer:

The YT channel is from "SiRobb", you can find it here, and he is "Cheshired5" as a user here on this forum.

Nov 23rd, 2020, 11:21	#1
Bits Junior Member Last Online: Dec 4th, 2023 08:50 Join Date: Jan 2020 Location: Alsager, S-o-T. ST7 2DB	oil in coolant I have a 2006 D5 xc90. The coolant has oil in it where do I find the oil cooler please?

Nov 23rd, 2020, 12:03	#2
Tannaton Bungling Amateur Last Online: Yesterday 20:51 Join Date: Aug 2014 Location: Beverley, East Yorks	The oil cooler is bolted to the rear of the sump but they normally don't give trouble. Are you sure it's engine or rather than gearbox oil - there is a gearbox oil heat exchanger within the radiator and that's more likely to be your culprit. __________________ 2011 XC90 D5 Executive 2003 C70 T5 GT 2012 Ford Ranger XL SC 1977 Triumph Spitfire 1500 1976 Massey Ferguson 135

Nov 23rd, 2020, 13:14	#4
john.wigley VOC Member since 1986 Last Online: Today 19:29 Join Date: Jan 2007 Location: Leicestershire	If 'Tannaton' is right and it is a similar system to the 7 series automatic cars, 'Fika', you need to act quickly. I had the same problem with my 745 when the oil cooler failed internally and allowed cross contamination of the fluids. It meant a new rad along with several flushes of the cooling system and transmission. I was lucky; I caught mine early and there was no lasting damage - let's hope yours is the same. Regards, John. __________________ Time flies like an arrow, fruit flies like a banana .....

Nov 24th, 2020, 18:32	#8
john.wigley VOC Member since 1986 Last Online: Today 19:29 Join Date: Jan 2007 Location: Leicestershire	If it is browny-red, it is most likely to be ATF, which starts life bright red, 'Bits'. J. __________________ Time flies like an arrow, fruit flies like a banana .....

Nov 24th, 2020, 20:28	#10
paddy74 Senior Member Last Online: Mar 29th, 2021 13:49 Join Date: May 2019 Location: Near Munich	^^ to make that a little clearer: The YT channel is from "SiRobb", you can find it here, and he is "Cheshired5" as a user here on this forum. __________________ Volvo XC90 D5 AWD Summum MY05 Harley-Davidson Ultra Classic Electra Glide MY91 FLHTCU

Nov 23rd, 2020, 13:00	#3
Fika Junior Member Last Online: Today 14:53 Join Date: Dec 2019 Location: City of the Metropolitan Elite	If the latter is the case, what could that.mean for the transmission? I always thought the cooling system had high pressure when hot..

Nov 24th, 2020, 18:14	#7
Bits Junior Member Last Online: Dec 4th, 2023 08:50 Join Date: Jan 2020 Location: Alsager, S-o-T. ST7 2DB	So engine or gearbox oil please?

Nov 24th, 2020, 19:28	#9
Mike A Member Last Online: Today 20:01 Join Date: Apr 2006 Location: Wakefield	You maybe lucky ...sirrob on u tube came across this believe he did flushing of systems and succeeded check it out but do not drive anymore ....good luck

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