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EGR dismantle, clean, and motor test, with pics !!

122K views 72 replies 44 participants last post by  ours2012 
#1 ·
Hi all, posting my pics following an EGR overhaul on my 2006 plate Scenic Grand 1.9 DCi. Engine is the F9Q version 80 E I think?

**Please note I changed my glow plugs at the same time if this does not apply ignore some of the sections!**

Ok first things 1st before you even start make sure you have an ex torx socket if like my engine you have the external torx bolts on the EGR pipe, mine was an 8mm socket

The rest just involves your run of the mill spanner and socket set and a torx screwdriver set

I bought some carb cleaner in advance, take your pick there are many to choose from, i also had a little stiff brush (old toothbrush will do)

Disconnect battery

Remove the cover off car to expose the shroud covering your glow plugs etc (sorry if some of the terminology is not exact, i'm not a mechanic:d)

There are several things that I removed in order to make life easier and get better access, choose whatever suits you best.

Undo the plastic screws covering windscreen shroud
10mm plastc nuts and 2 x torx screws at each end
Remove the rubber strip and rubber stops at each end.

Auto part Motor vehicle Automobile repair shop Tire Automotive tire


Auto part Automotive exterior Bumper Vehicle Car


Automotive exterior Bumper Auto part Grille Hood


Auto part Automotive exterior Bumper Vehicle Engine


Vehicle door Auto part Tire Automotive exterior Automotive tire


Next remove the 1st piece of plastic shroud covering the windscreen wipers

Vehicle Car Auto part Automotive exterior Bumper

Auto part Vehicle Car Automotive exterior Bumper


Ok now pop of the three covers that hide the nuts securing the windcreen wipers, unscrew and remove, i didn't need a puller for mine they came off with ease.

I also removed the plastic covers in the corners


Vehicle door Automotive exterior Vehicle Car Automotive window part

Motor vehicle Auto part Automotive exterior Vehicle Windshield


Auto part Automotive exterior Vehicle Automobile repair shop Hood

Vehicle Auto part Automotive exterior Car Windshield

Vehicle door Automotive exterior Bumper Windshield Automotive design


Remove wipers

Next its time to start removing the firewall panels

note the position of the bolts, it comes aprt in two sections, smaller panel to the right (for access to air filer box) and larger panel to the left, jiggle it a bit to get it out or remove the pipes to manifold and remove shroud over glow plugs whichever makes life easier

Auto part Automobile repair shop Vehicle Automotive fuel system Engine

Automotive exterior Auto part Bumper Windshield Vehicle door

Auto part Engine Automotive engine part Hood Automotive exterior

Auto part

Auto part Vehicle Engine Automotive exterior Car


Undo the two nuts holding this part of the manifold
Auto part Engine Vehicle Automotive engine part Car

Auto part Engine Vehicle Automotive engine part Car

unclip the the pipe next to it
Auto part Engine Fuel line Automotive fuel system Automotive engine part


Once done you can fold the flexible pipe out of the way to remove the shroud over the glow plugs
Auto part Engine Motor vehicle Vehicle Automotive engine part

Auto part Engine Vehicle Fuel line Automotive fuel system


Allowing access if you need to examine or change them

Next I removed the two ex torx bolts from the EGR pipe
Auto part Engine Vehicle Fuel line Automotive fuel system


Then remove the 3 bolts holding the EGR in place, last one at rear near bottom, I used a 13mm spanner

Auto part Fuel line Engine Carburetor Automotive engine part

Auto part Vehicle Automotive tire Car


Once I did this I could wiggle the EGR out
This is what I saw

Auto part Automotive exhaust

Auto part

Auto part




Pretty carbed up!

So I cleaned it

Soil Wood Litter

Auto part Automotive engine part

Auto part Bicycle part

Auto part Bicycle part Bearing Automotive engine timing part Transmission part


OK not content with that, I wanted to check the motor, I took the cover off (more torx screws) checked the cogs (no broken teeth) and then placed two spade connectors on the motor to test it on the battery, it span fine so I knew it worked:d

Auto part Bicycle part

Auto part

Auto part Bicycle part

Auto part Automotive engine part

Auto part Vehicle Car Engine Technology


I moved the cog by hand and the valve moved freely

Put it all back together and reassembled.

The valves cost in excess of £200.00 so for me it was worth checking and cleaning. Mine had stuck, it was burning loads of fuel, now closed:d

Hope this helps someone along the way
 

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#59 ·
Hi all, posting my pics following an EGR overhaul on my 2006 plate Scenic Grand 1.9 DCi. Engine is the F9Q version 80 E I think?

**Please note I changed my glow plugs at the same time if this does not apply ignore some of the sections!**

Ok first things 1st before you even start make sure you have an ex torx socket if like my engine you have the external torx bolts on the EGR pipe, mine was an 8mm socket

The rest just involves your run of the mill spanner and socket set and a torx screwdriver set

I bought some carb cleaner in advance, take your pick there are many to choose from, i also had a little stiff brush (old toothbrush will do)

Disconnect battery

Remove the cover off car to expose the shroud covering your glow plugs etc (sorry if some of the terminology is not exact, i'm not a mechanic:d)

There are several things that I removed in order to make life easier and get better access, choose whatever suits you best.

Undo the plastic screws covering windscreen shroud
10mm plastc nuts and 2 x torx screws at each end
Remove the rubber strip and rubber stops at each end.

View attachment 12821

View attachment 12822

View attachment 12823

View attachment 12824

View attachment 12825

Next remove the 1st piece of plastic shroud covering the windscreen wipers

View attachment 12828
View attachment 12829

Ok now pop of the three covers that hide the nuts securing the windcreen wipers, unscrew and remove, i didn't need a puller for mine they came off with ease.

I also removed the plastic covers in the corners


View attachment 12834
View attachment 12833

View attachment 12830
View attachment 12831
View attachment 12832

Remove wipers

Next its time to start removing the firewall panels

note the position of the bolts, it comes aprt in two sections, smaller panel to the right (for access to air filer box) and larger panel to the left, jiggle it a bit to get it out or remove the pipes to manifold and remove shroud over glow plugs whichever makes life easier

View attachment 12835
View attachment 12836
View attachment 12837
View attachment 12838
View attachment 12839

Undo the two nuts holding this part of the manifold
View attachment 12840
View attachment 12840
unclip the the pipe next to it
View attachment 12842

Once done you can fold the flexible pipe out of the way to remove the shroud over the glow plugs
View attachment 12843
View attachment 12844

Allowing access if you need to examine or change them

Next I removed the two ex torx bolts from the EGR pipe
View attachment 12844

Then remove the 3 bolts holding the EGR in place, last one at rear near bottom, I used a 13mm spanner

View attachment 12845
View attachment 12846

Once I did this I could wiggle the EGR out
This is what I saw

View attachment 12847
View attachment 12848
View attachment 12849



Pretty carbed up!

So I cleaned it

View attachment 12850
View attachment 12851
View attachment 12853
View attachment 12852

OK not content with that, I wanted to check the motor, I took the cover off (more torx screws) checked the cogs (no broken teeth) and then placed two spade connectors on the motor to test it on the battery, it span fine so I knew it worked:d

View attachment 12854
View attachment 12855
View attachment 12856
View attachment 12857
View attachment 12858

I moved the cog by hand and the valve moved freely

Put it all back together and reassembled.

The valves cost in excess of £200.00 so for me it was worth checking and cleaning. Mine had stuck, it was burning loads of fuel, now closed:d

Hope this helps someone along the way

Thanks for that it was a big help. it was a little different for my 1.5 dci but pointed me in the right direction. HOWEVER having cleaned the unit I have some better throttle response but still dead spots occassionally and check emissions still coming up on dash. Should i have removed the body as well and cleaned deeper? any suggestions?
 
#60 ·
Thanks for the excellent pictures Christew. I've just cleaned mine out and what a difference. I had previously done an EGR on my old scenic, but this one was different and your description / pics did the trick. I have a Haynes book of lies that covers the old EGR so this one was new to me. Runs and accelerates a lot smoother now.

I also took pics (which look very like yours). I used oven cleaner to do most of the baked on muck.

Once again for the great description.

Al
 
#62 ·
Hello ,
can somebody please help me identify some components on F9Q-870N 1.9dCI engine?
A=i think is EGR valve (which btw i want to clean it,the whole valve needs to be removed in order to clean the dirt inside?)
C=i think is the bypass valve for the EGR
F=oil decanter (needs to be cleaned from time to time?)
G=i think is high pressure diesel pump
H=exhaust pipe?
J=temperature sensor for exhaust gases?
I don't know what are D and E

Thanks
 

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#69 ·
Blanked my egr off today with a cheap plate off eBay, followed a guide ( not sure if I can post the link?) which involved cutting the pin that goes though the center so when the blank plate is in place the motor can still turn and thing it's working even though the opening is blocked off. No dash lights at all so far.

Sent from my LG-H815 using Tapatalk
 
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