Oily film in coolant overflow reservoir - 2.7 D3.

**Peter F** · 6th July 2020, 06:56 PM

I have a MY 08 Disco 3 with 2.7 (280k) which has been most reliable over the past 6 yrs of ownership, with the only problems being HPFP and air compressor in the last 12 months. Both of which I replaced myself( and yes I needed an extra elbow on each arm whilst doing the HPFP).
My situation is that I have only just noticed some dark discolouration on the overflow reservoir walls and a slight oily film on top of the coolant.
My greatest fear is a head gasket problem but at the moment there is no bubbling coming up thru the reservoir and oil level is steady and temps are fine even after a recent trip over 1200ks over the last week.
My question is "has anybody had a similar issue and are there any suggestions as to what may be the problem"? Is there any way of confirming my suspicions without first stripping down the engine?

Hope someone can give me an idea or two.

Regards, Pete

**rick130** · 6th July 2020, 08:04 PM

Oil cooler?

460cixy has just replaced the cooler in his after having that issue.

**justinc** · 6th July 2020, 10:25 PM

Oil cooler, do it NOW ! You don't want to be replacing the whole set of cooling system hoses

**460cixy** · 31st July 2020, 05:54 AM

Yup cooler for sure can be done in the driveway in a couple of hours. If it gets serious all the hoses will be rooted

**shanegtr** · 10th December 2020, 01:08 AM

Quick question for those who have done an oil cooler on the 2.7 - whats the trick removing the PCV seperator? I cant see how I can lift it high enough to clear before it hits the top of the firewall

**460cixy** · 10th December 2020, 07:23 AM

Originally Posted by shanegtr

Quick question for those who have done an oil cooler on the 2.7 - whats the trick removing the PCV seperator? I cant see how I can lift it high enough to clear before it hits the top of the firewall

It's one of those things you need to hold your mouth just right hop on one leg while you jiggle pull and push and swear at it and out of nowhere will just pop out and leaving wondering how the f$?! Did I manage that sorry but it's the hardest part of the job

**River** · 10th December 2020, 07:33 AM

As all before have said oil cooler, mines at 260km and has just started to show
Question are people replacing with genuine Landrover or after market?

**shanegtr** · 10th December 2020, 11:12 AM

Originally Posted by 460cixy

It's one of those things you need to hold your mouth just right hop on one leg while you jiggle pull and push and swear at it and out of nowhere will just pop out and leaving wondering how the f$?! Did I manage that sorry but it's the hardest part of the job

Is it required to remove the high pressure fuel line or can that stay in place?

**DiscoJeffster** · 10th December 2020, 11:59 AM

Originally Posted by shanegtr

Is it required to remove the high pressure fuel line or can that stay in place?

I didn’t have to on the 3L. It’s a hell of a job to get it out though. Twist, turn, pull etc (again on a 3L - not sure on 2.7L)

On the 3L you have to cut the snout of the intake plenum to get it out as well. You have to shorten it by nearly an inch - retaining enough that the intake Y piece o-rings still have a location to seal.

And then there’s the mixing of the oil and coolant to contend with as you remove it. It’s a joyful job I wish to never do again

Oily film in coolant overflow reservoir - 2.7 D3.

**PerthDisco** · 10th December 2020, 01:06 PM

Originally Posted by shanegtr

Quick question for those who have done an oil cooler on the 2.7 - whats the trick removing the PCV seperator? I cant see how I can lift it high enough to clear before it hits the top of the firewall

Yes, how the PCV is connected and what it’s connected to is the mystery element for me in this job. Is it removed simply to allow access to lift the oil cooler out? Does this ever need replacing like on the VWs is a regular fail item that leads to RMS failure.

I think the Nissen oil cooler is OEM

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