How to clean EGR and inlet manifold

macafee2 · 15th May 2018, 07:18

What should I use to clean the EGR valve and inlet manifold of a diesel?

anyone used AR6400-D if their fuel?

I was thinking of what I can use direct onto EGR valve and manifold

thank you

macafee2

spongeh · 15th May 2018, 07:39

I'n not sure a fuel additive will be powerful enough to removed baked on carbon deposits.

If it's blocked then get it removed and cleaned out. To give you an idea of what it's like in there and why a simple additive or spray will not penetrate this stuff, this is what mine looked like at 113,000 miles.

macafee2 · 15th May 2018, 08:04

did you just scrape it out or use any chemical?

macafee2

HarryM1BYT · 15th May 2018, 08:14

Quote:

Originally Posted by macafee2

What should I use to clean the EGR valve and inlet manifold of a diesel?

anyone used AR6400-D if their fuel?

I was thinking of what I can use direct onto EGR valve and manifold

thank you

macafee2

Assuming 'if their fuel' meant 'in their fuel'. The fuel doesn't go anywhere near the EGR, only pressurised air and the products of combustion, so it would never clean it.

If you meant removing the the EGR and soaking it in that - maybe. The carbon is burnt on, will likely be quite thick too, so a scrapper is needed to get the thick off first, then maybe an old toothbrush with some solvent. It is a really messy job.

paul d · 15th May 2018, 08:15

When I clean my EGR I use a small screwdriver first then a hardish piece of plastic. Give it a good squirt of WD40, bit more scraping & then a cloth to finish.

If you do it regularly it's a lot easier, doesn't take as long either. Surprising how quick the crud builds up.

The inlet manifold, I've found oven cleaner to work reasonably well, left to soak, well washed out then left to dry. The wife's hairdryer helps speed the drying up though. But don't tell her

Regards

Paul

spongeh · 15th May 2018, 08:20

Quote:

Originally Posted by macafee2

did you just scrape it out or use any chemical?

macafee2

I used the back of a butter knife to cut/chip/scrap the majority of the baked on stuff and then some Gunk to clear the rest of it.

Be aware that if it's got as bad as mine had there is a chance that your MAP sensor will be blocked and the whole manifold will need removing the clean it.

macafee2 · 15th May 2018, 08:24

Quote:

Originally Posted by HarryM1BYT

Assuming 'if their fuel' meant 'in their fuel'. The fuel doesn't go anywhere near the EGR, only pressurised air and the products of combustion, so it would never clean it.

If you meant removing the the EGR and soaking it in that - maybe. The carbon is burnt on, will likely be quite thick too, so a scrapper is needed to get the thick off first, then maybe an old toothbrush with some solvent. It is a really messy job.

I was wondering if used in the fuel the build up of crud was prevented

macafee2

klarzy · 15th May 2018, 08:54

Citrus cleaner and 2 hours in my heated ultrasonic cleaning bath did the trick

Arctic · 15th May 2018, 10:39

As above really I have been cleaning these out since 2010 when I first got my diesel Tourer it was one of the first jobs I did, and it is best then to add it to your annual service, I have seen so many owners add EGR bypass only to just replace the EGR.

The blockage as already been done and therefore the manifold will be in the same condition, as will the MAP sensor.

1

2

3

They all need to be removed and cleaned, manifold you can clean with engine degreaser or oven cleaner, then jet wash it out, making sure you have removed the MAP sensor.

EGR can be scraped out with an old hack saw blade, use the back of the blade not the teeth to get the excess off, then spray with carb cleaner, do not spray into the diaphragm hole, this is the little nozzle on the EGR, make sure the EGR is as clean as it can be.

4

Clean the MAP sensor with a rag with some carb cleaner sprayed on to it, wipe the nozzle hole clean again do not spray into the hole or poke anything into it.

5

6

As above it is wise to add this job to your annual service when you changed your air filter, oil filter PCV filter etc.

I have spares so it is just a case of swapping then out clean manifold & EGR, Map sensor will also help with your emissions when it come to your MOT.

7

If you are thinking of doing a bypass after all the cleaning then purchase an original EGR and gut it bypass that, in my opinion to save the MOT tester picking up on it.

8

9

Arctic.

rustymotor · 15th May 2018, 13:33

Best plan is bin it and bypass it, after all would you put a pipe up your bum and feed it in to your mouth to re circulate?

15th May 2018, 07:18	#1
macafee2 This is my second home Rover 75 Saloon & Tourer Join Date: Sep 2012 Location: Lincoln Posts: 14,928 Thanks: 1,630 Thanked 3,032 Times in 2,181 Posts	How to clean EGR and inlet manifold What should I use to clean the EGR valve and inlet manifold of a diesel? anyone used AR6400-D if their fuel? I was thinking of what I can use direct onto EGR valve and manifold thank you macafee2

15th May 2018, 07:39	#2
spongeh Loves to post MG ZT-T+ 180 Sport Auto Join Date: May 2016 Location: Wyrley Posts: 290 Thanks: 34 Thanked 117 Times in 72 Posts	I'n not sure a fuel additive will be powerful enough to removed baked on carbon deposits. If it's blocked then get it removed and cleaned out. To give you an idea of what it's like in there and why a simple additive or spray will not penetrate this stuff, this is what mine looked like at 113,000 miles. __________________ https://badges.fuelly.com/images/sma...uk/1095349.png http://badges.fuelly.com/images/smallsig-uk/106569.png

15th May 2018, 08:15	#5
paul d Posted a thing or two Rover 75 Saloon & Saab 93 'vert Join Date: Mar 2013 Location: coventry Posts: 1,378 Thanks: 199 Thanked 204 Times in 162 Posts	When I clean my EGR I use a small screwdriver first then a hardish piece of plastic. Give it a good squirt of WD40, bit more scraping & then a cloth to finish. If you do it regularly it's a lot easier, doesn't take as long either. Surprising how quick the crud builds up. The inlet manifold, I've found oven cleaner to work reasonably well, left to soak, well washed out then left to dry. The wife's hairdryer helps speed the drying up though. But don't tell her Regards Paul __________________ The Colour WAS CELESTIAL...! Meanwhile Back At The Ranch...!!!

15th May 2018, 08:54	#8
klarzy This is my second home none but not gone Join Date: Mar 2013 Location: March, Cambs Posts: 16,437 Thanks: 894 Thanked 4,247 Times in 3,025 Posts	Citrus cleaner and 2 hours in my heated ultrasonic cleaning bath did the trick __________________ [SIGPIC][/SIGPIC]….All praise Bananaswan….

15th May 2018, 10:39	#9
Arctic Give to Learn Freelander 2 Join Date: Aug 2010 Location: West Midlands Posts: 18,715 Thanks: 1,155 Thanked 6,407 Times in 3,874 Posts	As above really I have been cleaning these out since 2010 when I first got my diesel Tourer it was one of the first jobs I did, and it is best then to add it to your annual service, I have seen so many owners add EGR bypass only to just replace the EGR. The blockage as already been done and therefore the manifold will be in the same condition, as will the MAP sensor. 1 2 3 They all need to be removed and cleaned, manifold you can clean with engine degreaser or oven cleaner, then jet wash it out, making sure you have removed the MAP sensor. EGR can be scraped out with an old hack saw blade, use the back of the blade not the teeth to get the excess off, then spray with carb cleaner, do not spray into the diaphragm hole, this is the little nozzle on the EGR, make sure the EGR is as clean as it can be. 4 Clean the MAP sensor with a rag with some carb cleaner sprayed on to it, wipe the nozzle hole clean again do not spray into the hole or poke anything into it. 5 6 As above it is wise to add this job to your annual service when you changed your air filter, oil filter PCV filter etc. I have spares so it is just a case of swapping then out clean manifold & EGR, Map sensor will also help with your emissions when it come to your MOT. 7 If you are thinking of doing a bypass after all the cleaning then purchase an original EGR and gut it bypass that, in my opinion to save the MOT tester picking up on it. 8 9 Arctic. __________________ Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise "

15th May 2018, 08:04	#3
macafee2 This is my second home Rover 75 Saloon & Tourer Join Date: Sep 2012 Location: Lincoln Posts: 14,928 Thanks: 1,630 Thanked 3,032 Times in 2,181 Posts	did you just scrape it out or use any chemical? macafee2

15th May 2018, 13:33	#10
rustymotor Posted a thing or two Rover 75 Tourer Join Date: May 2017 Location: Hull Posts: 1,848 Thanks: 216 Thanked 432 Times in 340 Posts	Best plan is bin it and bypass it, after all would you put a pipe up your bum and feed it in to your mouth to re circulate?