XC90 oil leak at the front

[RoyMacDonald]

What part of the rad converts ozone to oxygen? I thought it might be that small thing you say is the power steering oil cooler. I'm suprised the power steering needs an oil cooler. What makes it get hot?

All the best.

Roy

[tem]

Originally Posted by RoyMacDonald

What part of the rad converts ozone to oxygen? I thought it might be that small thing you say is the power steering oil cooler. I'm suprised the power steering needs an oil cooler. What makes it get hot?

All the best.

Roy

The Power Steering Pump, heats the oil.

tem.

[RoyMacDonald]

Originally Posted by tem

The Power Steering Pump, heats the oil.

tem.

Must be some pump.

Anyone know what part of the rad coverts ozone to oxygen?

Roy

[tem]

Originally Posted by RoyMacDonald

Must be some pump.

Anyone know what part of the rad coverts ozone to oxygen?

Roy

As far as I can find out. The whole radiator plays a part, in reducing ozone.

"Volvo’s PremAir system coats the car radiator with chemicals that neutralise oxides of nitrogen and low-level ozone".

tem.

[RoyMacDonald]

Thanks Tem. I found this from what you said.......

For automotive
applications, the new system involves placing a catalytic
coating on the car's radiator or air conditioner condenser. As
air passes over the radiator or condenser, the catalyst converts
the ozone into oxygen.

The test results indicate that the coating does not
affect the corrosion properties of the radiator and that the rate
of the corrosion does not increase. Microscope analysis of the
structure indicated that the surface of the coating is porous
which does not create a concentration gradient for the
corrosion attacks. The difference in corrosion potential
between the coating and the aluminium alloy of the radiator is
very small, and the coating is slightly anodic. This
relationship protects the aluminium alloy from galvanic
corrosion.

Read the full report here......http://www.catalysts.basf.com/Main/d...b.pdf?d=982728

All the best.

Roy

[Clan]

Originally Posted by RoyMacDonald

Must be some pump.

Anyone know what part of the rad coverts ozone to oxygen?

Roy

Yes , it is the black coating of the radiator on the engine side ...

[gasman]

Originally Posted by gasman

it may be the intercooler

mine was the intercooler £300 fitted,its the the one in the centre.

[dave7761]

After finding that my water reservoir was building up with oil I decided to investigate everyone was telling me it was the head gasket including my local Volvo dealer. I pressure tested the head and found no problems. Then i reverted to Google where i found a video of the same problem but on a Renault Megan. This was the exact same problem. I looked for the oil cooler and again went on google! to no avail all the sites & forums say it is under the rad. I began to strip all the piping and other parts ready to drop the front end to remove the radiator. on dropping the sump guard I located the oil cooler!! attached to the sump by the oil drain plug. I then removed it and tested it and found it to be leaking, I flushed the system as best I could with dishwasher salt. I got a new oil cooler from ebay a fraction of the cost of Volvo OEM. All in all I spent 3 hours (if I had known location it would have been 1 hour) It cost £40 for the cooler then the cost of oil & filter.... Car is running like a dream again.

[Clan]

Originally Posted by dave7761

After finding that my water reservoir was building up with oil I decided to investigate everyone was telling me it was the head gasket including my local Volvo dealer. I pressure tested the head and found no problems. Then i reverted to Google where i found a video of the same problem but on a Renault Megan. This was the exact same problem. I looked for the oil cooler and again went on google! to no avail all the sites & forums say it is under the rad. I began to strip all the piping and other parts ready to drop the front end to remove the radiator. on dropping the sump guard I located the oil cooler!! attached to the sump by the oil drain plug. I then removed it and tested it and found it to be leaking, I flushed the system as best I could with dishwasher salt. I got a new oil cooler from ebay a fraction of the cost of Volvo OEM. All in all I spent 3 hours (if I had known location it would have been 1 hour) It cost £40 for the cooler then the cost of oil & filter.... Car is running like a dream again.

The hardest part of this job is the clean up , the oil soaks into every single rubber hose , and over a couple of years they will swell and eventually burst , one by one , I flushed one out with TFR 16 times and still it kept appearing .. A new set of hoses is likely to be £400 . don't forget the small ones , heater hoses, oil cooler hoses etc etc ...