Hi All
Can you disconnect the EGR on a HDI 90 (Siemens MY 2002)?
Plan to have a look and see if I can replace one of the gaskets in the pipework with a bit of tin so blocking the exhaust gas but leaving everything else working.
Anyone done it any other ways?
Cheers
Can you disconnect EGR on HDI 90?
Moderator: Moderators
- swiss
- 3.0 24v
- Posts: 1000
- Joined: Sat Jun 07, 2008 5:34 pm
- Location: IM IN UR FACEBOOK ADING TEH STRANGES
Re: Can you disconnect EGR on HDI 90?
I believe a 10p piece is a popular tool for blocking the EGR 

The man with no car
"Close the door on your way out, and don't forget your monkey."
"Close the door on your way out, and don't forget your monkey."
Re: Can you disconnect EGR on HDI 90?
Tell me how and where it goes!!
It definately can't be a dealer trick as nothing they do costs 10p!!!!
It definately can't be a dealer trick as nothing they do costs 10p!!!!
- Doggy
- Mod with a 2.2 HDi, De-Fapped!
- Posts: 10710
- Joined: Mon Oct 13, 2008 11:49 pm
- Location: Northants
Re: Can you disconnect EGR on HDI 90?
The EGR is vacuum operated, you can just disconnect & plug the vacuum pipe at the solenoid valve.
Assuming your EGR isn't leaking, that should take care of it.
I've never tried it personally, but can't see why it wouldn't work.
On cars with Bosch systems the ECU will report a fault if you disconnect the solenoid valve electrically, or if the solenoid supply is missing, but it can't tell if the actual valve is working or not AFAIK.
Don't know about Siemens, but if it's like their industrial stuff, order a new one with before 10:00 delivery & it'll still be obsolete before you get it.....
Assuming your EGR isn't leaking, that should take care of it.
I've never tried it personally, but can't see why it wouldn't work.
On cars with Bosch systems the ECU will report a fault if you disconnect the solenoid valve electrically, or if the solenoid supply is missing, but it can't tell if the actual valve is working or not AFAIK.
Don't know about Siemens, but if it's like their industrial stuff, order a new one with before 10:00 delivery & it'll still be obsolete before you get it.....
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
Re: Can you disconnect EGR on HDI 90?
All i can say is my HDi 90 is smoking big time and if i could stop it in some way, i would. Am i right in thinking that EGR blocking doesn't affect smoke output?
2000 D9 Coupé 2.0 SE EW10J4 Scarlet Red - 5 litres of oil gone in 500 miles!!! Time for a new coupe me thinks
Re: Can you disconnect EGR on HDI 90?
I think the best way to go would be to remove and clean the EGR.eoin27 wrote:All i can say is my HDi 90 is smoking big time and if i could stop it in some way, i would. Am i right in thinking that EGR blocking doesn't affect smoke output?
I was hoping for a "how to" in the Wiki but I think I forgot about asking for it

Re: Can you disconnect EGR on HDI 90?
I remember you were saying that before. But when people say EGR, i don't know if they are referring to the actual valve or the L pipe coming from the manifold. I took off the L pipe and cleaned most of the gunk. When it went back on - No difference.Still smokes like a motherf***ersupafrisk wrote:I think the best way to go would be to remove and clean the EGR.eoin27 wrote:All i can say is my HDi 90 is smoking big time and if i could stop it in some way, i would. Am i right in thinking that EGR blocking doesn't affect smoke output?
I was hoping for a "how to" in the Wiki but I think I forgot about asking for it
2000 D9 Coupé 2.0 SE EW10J4 Scarlet Red - 5 litres of oil gone in 500 miles!!! Time for a new coupe me thinks