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15th May 2018, 07:18 | #1 |
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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 |
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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. |
15th May 2018, 08:04 | #3 |
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did you just scrape it out or use any chemical?
macafee2 |
15th May 2018, 08:14 | #4 | |
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Quote:
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.
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15th May 2018, 08:15 | #5 |
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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
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15th May 2018, 08:20 | #6 |
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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. |
15th May 2018, 08:24 | #7 | |
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Quote:
macafee2 |
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15th May 2018, 08:54 | #8 |
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Citrus cleaner and 2 hours in my heated ultrasonic cleaning bath did the trick
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15th May 2018, 10:39 | #9 |
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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.
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15th May 2018, 13:33 | #10 |
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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?
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