OIL COOLER OIL FLOW

chrisbowler · Post by **chrisbowler** » Mon Aug 04, 2014 9:18 pm

Hope someone can help - I have a Discovery 2 4.6 V8 in an off road racer. We have a remote oil filter and the oil flow to it is great. However the oil flow to the oil cooler seems to be the same on both pipes. I would expect the flow to come out of 1 but not out of both. As a result, the oil cooler is acting as a blockage. Anyone seen this before and how can I rectify it.

chris bowler

unstable load · Post by **unstable load** » Tue Aug 05, 2014 5:35 am

Are you saying that oil flows from BOTH pipes to the cooler?
Is the cooler plumbed in series from the filter? In other words, does oil flow from the engine to the filter - to the cooler - back to the engine?

chrisbowler · Post by **chrisbowler** » Tue Aug 05, 2014 8:28 am

The car does have a remote oil filter but the late front covers have two ports for the oil cooler pipes and yes we have oil flowing under pressure from both pipes. There is no circuit when connected to the cooler. I was wondering if there is a problem with the relief valve. Ultimately I could blank off the cooler ports and plumb the cooler in line after the filter and back into the engine.

SuperV8 · Post by **SuperV8** » Tue Aug 05, 2014 11:43 am

The outlet (lower) fitting from the front cover should have an an extended section to divert the oil flow into the pipe.

You can see for example ESR4415
http://www.rimmerbros.co.uk/Item--i-GRID800013

What is your pipe like?

Tom.

chrisbowler · Post by **chrisbowler** » Tue Aug 05, 2014 9:33 pm

We have removed the cooler pipes and replaced them with hydraulic hoses. The problem was there when I used the factory pipes - it kept blowing off the quick release couplings.

stevieturbo · Post by **stevieturbo** » Wed Aug 06, 2014 5:52 pm

Draw a schematic of what you have now.

DEVONMAN · Post by **DEVONMAN** » Thu Aug 07, 2014 10:36 pm

If the front cover is a 4.6 type (ie no dizzy)There is a spring loaded valve which allows oil to bypass the oil cooler circuit when the oil is cold and thick and doesn't really need to get cooled. As the oil warms and thins the valve stays closed and oil passes through the cooler. This valve may be stuck partially open and allowing oil to bypass the cooler circuit and both ports will then see similar pressure.

However, if the cover is an interim serp dizzy type then as Superv8 said, the oil is forced around the cooler circuit by a special end extension on one of the oil cooler pipes.

Regards Denis

chrisbowler · Post by **chrisbowler** » Fri Aug 22, 2014 7:25 pm

Thanks Denis

Does this mean that the oil will flow the correct way one the oil gets warm or have I got a problem all the time. In the mean time, IU have piped the oil through the filter, then to a cooler and back to the remote filter mount and back into the engine.

DEVONMAN · Post by **DEVONMAN** » Fri Aug 22, 2014 10:54 pm

The cover (non dizzy type cover) has two pressure control valves held in place with circlips. The one nearest the filter controls the flow through the oil cooler and as stated before will open when the oil is cold and thick and reduce flow through the cooler. The second valve nearest the left side of the engine,(looking from the drivers seat) controls overall oil pressure and opens when the oil pressure reaches the value set by Rover ( approx. 50lb/in2)and returns the oil to the pump inlet.
If you are concerned about your set up then remove the valves and clean them and make sure they are not sticking.

Just to add, If you have the same oil flow from both oil cooler ports then it's possible that someone has removed the valve which is located near the oil filter. (This I found to be the case on an ebay item I bought)

Regards
Denis

Dixie6789 · Post by **Dixie6789** » Thu Sep 18, 2014 8:58 pm

I just blocked mine off with 2 x plugs and used a thermostatic sandwich plate in between the oil filter.

Mark

Forgot to say its a interim cover plate.

DEVONMAN · Post by **DEVONMAN** » Thu Sep 18, 2014 9:53 pm

Dixie6789 wrote:I just blocked mine off with 2 x plugs and used a thermostatic sandwich plate in between the oil filter.

Mark

Forgot to say its a interim cover plate.

That works with an interim cover.

If you do that on a non dizzy type cover you should remove the internal spring loaded valve held in by a circlip on the right side of the cover. (looking from the drivers seat)

Dixie6789 · Post by **Dixie6789** » Thu Sep 18, 2014 10:22 pm

Isn't that the pressure relief valve for the oil pump?

When I looked at it, the holes for the cooler seems to just flow, no restriction.

In fact I couldn't see how the system worked. Someone on here said just blank them off.

DEVONMAN · Post by **DEVONMAN** » Thu Sep 18, 2014 10:55 pm

The interim cover with dizzy which you have is a totally different design to a gems Non dizzy cover.
You can block off the two oil cooler points on an interim cover, TVR do it and put a oil pressure sensor in the lower one.
There is only one spring loaded valve in an interim cover and yes that is the pressure relief valve.
If you want oil to flow to an oil cooler on an interim cover you need to fit the specially shaped OE pipe which blocks oil from flowing straight to the filter.

Dixie6789 · Post by **Dixie6789** » Fri Sep 19, 2014 7:45 am

As you look at the cover, the oil relief valve is on te left and one of the oil cooler ports. There is another underneath and to the right.

Is it ok that I have blocked the right one off, and put a plug with a oil temp sender in the other.

The cooler is piped using a sandwich plate.

Thanks Mark

DEVONMAN · Post by **DEVONMAN** » Fri Sep 19, 2014 7:00 pm

Dixie6789 wrote:As you look at the cover, the oil relief valve is on te left and one of the oil cooler ports. There is another underneath and to the right.

Is it ok that I have blocked the right one off, and put a plug with a oil temp sender in the other.

The cooler is piped using a sandwich plate.

Thanks Mark

Yes it is ok what you have done provided the cover is an interim type cover with facility for a distributor.

|Regards Denis