Help I gotta question

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Swampey

New Member
Posts
193
Location
Farnham- Surrey
For the first time today I had the bonnet open to do some tinkering about.

Panic :eek:


I Wanted to cleanup MAP & MAF sensors to see if this would help with a small hump issue, well after an hour all done, and dam she still starts up,m thats a first for me, normally when I tinker, Ive been known to screw things up.... Let you all know if any improvement when Ive taken the truck out this afternoon for a blast...

Some thing I did notice and I want your assistance over is, that I have noticed a small brass screw inserted to the EGR vacum hose... any ideas why cos there are no blankings been fitted, rest of the EGR seems to be in place

Plus there dryed oil on the front of the engine where the intercooler is, is this a sign of a fubar gasket
 
Swampey said:
For the first time today I had the bonnet open to do some tinkering about.

Panic :eek:


I Wanted to cleanup MAP & MAF sensors to see if this would help with a small hump issue, well after an hour all done, and dam she still starts up,m thats a first for me, normally when I tinker, Ive been known to screw things up.... Let you all know if any improvement when Ive taken the truck out this afternoon for a blast...

Some thing I did notice and I want your assistance over is, that I have noticed a small brass screw inserted to the EGR vacum hose... any ideas why cos there are no blankings been fitted, rest of the EGR seems to be in place

Plus there dryed oil on the front of the engine where the intercooler is, is this a sign of a fubar gasket
Click to expand...

1. The EGR valve may have been blanked between the exhaust manifold and the pipe which goes to the EGR valve - it's just a thin plate.

2. If the oil is on the front of the engine, facing the fan it is almost certainly the camshaft front oil seal that has gone (very common). They cost about £6+vat and take about 2 mins to fit.

Did mine about 6 months ago and no more leak since then.

It may also be leaking from the rocker cover gasket. Buy and fit new one.
 
Thanks Biglad but she had most definately not been blanked in any way shape or form.. cos everything is still attached and is connected

But whats the point in putting a screw in the vacum hose ????

As for this afternoons blast, hummmmm it was well worth cleaning both of them sensors and she is pulling like it should do now...

Still need to make improvements and a remap is required, cos I noticed a flat spot when using the kick down at 70... over all happy chappy so far:D
 
Swampey said:
Thanks Biglad but she had most definately not been blanked in any way shape or form.. cos everything is still attached and is connected

But whats the point in putting a screw in the vacum hose ????

As for this afternoons blast, hummmmm it was well worth cleaning both of them sensors and she is pulling like it should do now...

Still need to make improvements and a remap is required, cos I noticed a flat spot when using the kick down at 70... over all happy chappy so far:D
Click to expand...


If you are using kick-down at 70mph, I would suggest that your expectations of performance are a little optomistic.
 
thebiglad said:
If you are using kick-down at 70mph, I would suggest that your expectations of performance are a little optomistic.
Click to expand...
dropping a cog at that speed aint gonna be much help in a 2.5 ton dezul brick, but the td5 are quick for a dezul.
 
No problem, it's the simplest way to eliminate the EGR without blanking, the vacuum pipe is obturated to not lose vacum and besides it will not open the valve. In this case the choke rod is bogged down because the vacuum doesnt activate it so the engine ie getting just pure air(in case if it's not bloccked open). Dont panic just leave it like that or when tou have time blank your EGR properly.
 
Guys guys shes working alot better than before

The blast / test run was so that I could see some improvement and know that I have got some form of power available when over taking on motorways..

Dont quite like the idea of pulling onto the outside lane on a motorway and the engine just spluttering and vehicle not moving...... My diso aint no sports car, I know that for sure
Im just confused about this screw in a vacum hose ??????????
 
In this case I'm sure that the valve is closed, as I said leave it like this until you decide to use the usual blanking method. You can unscrew it and put back the pipe on the EGR valve but I'm sure you'll feel a comedown when the valve will open activated by vacuum and the engine will get exhaust gas insttead of clean oxygen. Just be sure that the screw clogs perfectly the pipe as to not lose vacuum....................that's my oppinion, my car is in the same status now and works great.
 
Last edited:
Swampey said:
Guys guys shes working alot better than before

The blast / test run was so that I could see some improvement and know that I have got some form of power available when over taking on motorways..

Dont quite like the idea of pulling onto the outside lane on a motorway and the engine just spluttering and vehicle not moving...... My diso aint no sports car, I know that for sure
Im just confused about this screw in a vacum hose ??????????
Click to expand...


The issue about using kickdown at 70mph is twofold:

1. You drop a gear - 4th to 3rd, but much more importantly

2. You will also drop out of "Torque Converter lockup" which also means you lose a percentage of any power you are generating by 'hoofing' it.

You will get best response at 70 by pressing the pedal just enough to give max drive but without kicking down the box.
 
Swampey said:
For the first time today I had the bonnet open to do some tinkering about.

Panic :eek:


I Wanted to cleanup MAP & MAF sensors to see if this would help with a small hump issue, well after an hour all done, and dam she still starts up,m thats a first for me, normally when I tinker, Ive been known to screw things up.... Let you all know if any improvement when Ive taken the truck out this afternoon for a blast...

Some thing I did notice and I want your assistance over is, that I have noticed a small brass screw inserted to the EGR vacum hose... any ideas why cos there are no blankings been fitted, rest of the EGR seems to be in place

Plus there dryed oil on the front of the engine where the intercooler is, is this a sign of a fubar gasket
Click to expand...
Go buy an EGR bypass kit from here Alive Tuning - Land Rover Performance Tuning - Defender, Discovery, Freelander, Range Rover, TDi, TD4, TD5, TD6, TDV6, and TDV8 or similar, and if yer as bad as you say at tinkering like me, it'll take just over an hour and then you'll really notice the difference :D :D
 
Thinking about it, if the screw is in the vacum hose theres no real point in having the EGR Valve and all that pipe work in situe..after all, valve might might be open. but not really giving a wide neck for the intake of air and this is maybe why she still kicks out some black smoke, thus meaning that the EGR Valve must be chokerd with oil and gunk or is there some thing else happening

PS what should the colour of nearly new engine oil be.........serviced about 1000 miles ago
 
Last edited:
Valve and inlet manifold will most certainly be caked in black ****e, as for the colour of 'new' oil after 1000 miles, probably black as well, as it ain't new any more :)
 
Swampey said:
Thinking about it, if the screw is in the vacum hose theres no real point in having the EGR Valve and all that pipe work in situe..after all, valve might might be open. but not really giving a wide neck for the intake of air and this is maybe why she still kicks out some black smoke, thus meaning that the EGR Valve must be chokerd with oil and gunk or is there some thing else happening

PS what should the colour of nearly new engine oil be.........serviced about 1000 miles ago
Click to expand...

For the color of oil you already have a good answer..........besides............

don't think to much about the EGR. it is only for ecological reasons not to improve the operation of the engine...(contrariwise).........the colour of the smoke you've seen has nothing to do with it.........check out RAVE about EGR.......if you don't have it here is the essence

Engine design has evolved in order to minimise the emission of harmful by-products. Emission control systems fitted
to Land Rover vehicles are designed to maintain the emission levels within the legal limits pertaining for the specified
market.
Despite the utilisation of specialised emission control equipment, it is still necessary to ensure that the engine is
correctly maintained and is in good mechanical order, so that it operates at its optimum condition.
In addition to emissions improvements through engine design and the application of electronic engine management
systems, special emission control systems are used to limit the pollutant levels developed under certain conditions.
Two main types of additional emission control system are utilised with the Td5 engine to reduce the levels of harmful
emissions released into the atmosphere. These are as follows:
1 Crankcase emission control – also known as blow-by gas emissions from the engine crankcase.
2 Exhaust gas recirculation – to reduce NO2 emissions.

The exhaust gas recirculation (EGR) valve permits a controlled amount of exhaust gas to combine with the fresh air
entering the engine. The exhaust gas reduces the combustion temperature by delaying the fuel burning rate, which
assists in reducing the quantity of oxides of nitrogen.
On EU3 models, an EGR cooler is employed to further reduce the combustion temperature. By passing the exhaust
gas through a bundle of pipes flooded by coolant, the density of the exhaust gas going into the engine is increased.
This process further reduces the amount of oxygen, which in turn, further reduces the amount of NO2 in the exhaust.
Recirculating too much exhaust gas can result in higher emissions of soot, HC and CO due to insufficient air. The
recirculated exhaust gas must be limited so that there is sufficient oxygen available for combustion of the injected fuel
in the combustion chamber, to do this the Engine Control Module (ECM) is used to control the precise quantity of
exhaust gas to be recirculated in accordance with the prevailing operating conditions. Influencing factors include:
l the mass of air flow detected by the mass air flow sensor.
+ENGINE MANAGEMENT SYSTEM - Td5, DESCRIPTION AND OPERATION, Description.
l the ambient air pressure, determined by the ambient air pressure sensor which is used to initiate adjustments
to reduce the amount of smoke produced at high altitudes.
+ENGINE MANAGEMENT SYSTEM - Td5, DESCRIPTION AND OPERATION, Description.
Other factors which are taken into consideration by the engine management system for determining the optimum
operating condition include:
l Manifold inlet air temperature
l Coolant temperature
l Engine speed
l Fuel delivered

The EGR valve is a cast and machined assembly which locates on the front end of the inlet manifold assembly. The
machined faces of the EGR assembly and the inlet manifold are attached together using four screws passing through
the four corners of a flange in the EGR assembly to tappings in the front face of the inlet manifold. A gasket is used
to seal the interface between the EGR valve and the front face of the inlet manifold. The gasket should be changed
every time the EGR valve assembly is removed from the air intake manifold.
The intake side of the EGR valve allows the passage of fresh intercooled air through to the inlet manifold via a rubber
hose which is attached to the front face of the EGR valve assembly by a metal band clamp. The bottom port of the
EGR valve is connected to the EGR pipe using a metal band clamp.
A vacuum port on top of the EGR valve connects to the EGR modulator through a blue, small-bore suction hose. When
a vacuum is applied to the EGR valve suction port it causes a spindle with sealing disc (EGR valve) to be raised,
thereby opening the port at the EGR pipe to allow the recirculated exhaust gas to pass through into the inlet manifold.
When the vacuum is removed from the suction port the EGR valve returns to its rest position under the influence of a
spring to tightly close the exhaust gas port. Thus controlled opening of the EGR valve determines the mass of
recirculated exhaust gas allowed to flow through to the inlet manifold.


There is a little difference between EU3 models and PRE EU3(EU2) models but don't bother about this EGR s**t, get rid of it
 
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