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[I_want_an_Omega]

I posted another thread about a noise on cold start.

Although not entirely separate from that - what are the pros/cons in blanking off the EGR on a 3.0?

Is there a "how to" - had a quick look, but cant see anything obvious.

Thanks

[doz]

Oh Lordy this will run and run and run. Best get ya popcorn ready!!!!!! There's a lot of people who are for blocking it off and those who aren't. The only thing I can say is I've done it on several different motors, both diesel and petrol and never had any issues. The arguments seem to revolve around heat. For those against blocking they say the Cylinder temp is reduced as there's not a big a bang as some of the volume is taken up by spent gases. The For blocking crowd say that can't be right as your taking hot gases and throwing them back into the cylinder so raising the temp anyway. On it's own you won't see any performance increase by blocking however I have noticed engines running smoother when cruising. This is the only time the valve is open when you are at a constant throttle/speed. So apart from keeping the inlet manifold clean there is no noticeable benefit from blocking off. I tend to leave mine running until I have any issue which means I need to disconnect it and then I block it. That's just me others will clean and keep them in tip top condition.   

[Elite_L0ver]

Oh Lordy this will run and run and run. Best get ya popcorn ready!!!!!! There's a lot of people who are for blocking it off and those who aren't. The only thing I can say is I've done it on several different motors, both diesel and petrol and never had any issues. The arguments seem to revolve around heat. For those against blocking they say the Cylinder temp is reduced as there's not a big a bang as some of the volume is taken up by spent gases. The For blocking crowd say that can't be right as your taking hot gases and throwing them back into the cylinder so raising the temp anyway. On it's own you won't see any performance increase by blocking however I have noticed engines running smoother when cruising. This is the only time the valve is open when you are at a constant throttle/speed. So apart from keeping the inlet manifold clean there is no noticeable benefit from blocking off. I tend to leave mine running until I have any issue which means I need to disconnect it and then I block it. That's just me others will clean and keep them in tip top condition.

useful as ever doz i am thinking of blocking mine so am intrested in this

[doz]

Haven't you got a cambelt due on yours soon? Would make a idea opportunity

[Elite_L0ver]

Haven't you got a cambelt due on yours soon? Would make a idea opportunity

yeah but mines only on the side and easy acessable just take the 2 torx bolts out and block there true what you like for sat

[Kevin Wood]

EGR does reduce combustion temperatures due to the spent gases in the intake charge. The increase in Intake temperature is insignificant once the charge ignites in the cylinder.

However, this is done mainly for emissions and (to a much lesser extent) fuel consumption reasons rather than to protect the engine.

There should be no performance gain from blanking if the system is working properly as the EGR is closed at wide open throttle.

Blanking it off is a useful diagnostic step if you suspect the EGR valve causing a poor idle, but if it 'ain't broke don't fix it. IMHO

[I_want_an_Omega]

EGR does reduce combustion temperatures due to the spent gases in the intake charge. The increase in Intake temperature is insignificant once the charge ignites in the cylinder.

However, this is done mainly for emissions and (to a much lesser extent) fuel consumption reasons rather than to protect the engine.

There should be no performance gain from blanking if the system is working properly as the EGR is closed at wide open throttle.

Blanking it off is a useful diagnostic step if you suspect the EGR valve causing a poor idle, but if it 'ain't broke don't fix it. IMHO

Ok, so could it be causing my ticking noise from cold - and could blanking i solve the problem?

[Elite_L0ver]

EGR does reduce combustion temperatures due to the spent gases in the intake charge. The increase in Intake temperature is insignificant once the charge ignites in the cylinder.

However, this is done mainly for emissions and (to a much lesser extent) fuel consumption reasons rather than to protect the engine.

There should be no performance gain from blanking if the system is working properly as the EGR is closed at wide open throttle.

Blanking it off is a useful diagnostic step if you suspect the EGR valve causing a poor idle, but if it 'ain't broke don't fix it. IMHO

Ok, so could it be causing my ticking noise from cold - and could blanking i solve the problem?

Maybe there's only one way to find out............ Fight lol no try it It will work for some may help you may not 

[The Red Baron]

EGR does reduce combustion temperatures due to the spent gases in the intake charge. The increase in Intake temperature is insignificant once the charge ignites in the cylinder.

However, this is done mainly for emissions and (to a much lesser extent) fuel consumption reasons rather than to protect the engine.

There should be no performance gain from blanking if the system is working properly as the EGR is closed at wide open throttle.

Blanking it off is a useful diagnostic step if you suspect the EGR valve causing a poor idle, but if it 'ain't broke don't fix it. IMHO

Ok, so could it be causing my ticking noise from cold - and could blanking i solve the problem?

sounds more like a leaky ex manifold gasket to me. tbh.

[SteveAvfc.]

EGR does reduce combustion temperatures due to the spent gases in the intake charge. The increase in Intake temperature is insignificant once the charge ignites in the cylinder.

However, this is done mainly for emissions and (to a much lesser extent) fuel consumption reasons rather than to protect the engine.

There should be no performance gain from blanking if the system is working properly as the EGR is closed at wide open throttle.

Blanking it off is a useful diagnostic step if you suspect the EGR valve causing a poor idle, but if it 'ain't broke don't fix it. IMHO

Ok, so could it be causing my ticking noise from cold - and could blanking i solve the problem?

sounds more like a leaky ex manifold gasket to me. tbh.

Maybe cracked manifold or missing stud as i suffered.

[Kevin Wood]

EGR does reduce combustion temperatures due to the spent gases in the intake charge. The increase in Intake temperature is insignificant once the charge ignites in the cylinder.

However, this is done mainly for emissions and (to a much lesser extent) fuel consumption reasons rather than to protect the engine.

There should be no performance gain from blanking if the system is working properly as the EGR is closed at wide open throttle.

Blanking it off is a useful diagnostic step if you suspect the EGR valve causing a poor idle, but if it 'ain't broke don't fix it. IMHO

Ok, so could it be causing my ticking noise from cold - and could blanking i solve the problem?

sounds more like a leaky ex manifold gasket to me. tbh.

Maybe cracked manifold or missing stud as i suffered.

Yep, or hydraulic tappets taking a while to quieten down.

Could be a leak in the EGR pipe, I suppose, but blocking the valve off won't help. Sometimes you'll see a little soot around the crack if it's leaking.

[I_want_an_Omega]

Ok, went and had a poke about with the EGR just now. Lifted it off to find that it was already blanked off  . Must have been done by a previous owner. All was nice and tight.

I've taken the blanking out and will try it for a bit and see how she feels.

On the subject of these exhaust manifolds - do they actually crack, or is it a gasket problem? Sounds like a bit of a design problem really doesn't it? Is it affected by how you use the car at all? I ask as virtually as soon we start it up from cold we are out onto an open A road to go in any direction - hence from cold to 60mph usually happens within a minute or so.