Liqui Moly Diesel Purge. The Best Injector Cleaner I've Ever Used

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The first video for the D5 163 and the same principle applies to other makes of diesel.
This method is unlikely to work on the D5 185 and later versions due to them using a different type of HP pump which requires fuel to be supplied at a higher pressure. As an Amazon Associate I earn from qualifying purchases. Using my Amazon links does not cost you any extra.

[@lionofjudah4574]

Magnificent review. Every word this guy say is true. If you have any doubts, do it ASAP. You will have no more doubts. This stuff should be mandatory annual maintenance.

[@imusiccollection]

looked at loads of LM vids and this was the simplest and most clearly explained, cheers!

[@midlifecrisis.2409]

Just done this on my 2001 V70 D5 project car,like you say a bit fiddly getting the hoses connected but went ok. It didn't look like it was doing much but at the end it had discoloured the paper in the inline filter on the return hose. I haven't had a chance to drive the car yet as it has taken a year to sort all the bodges from the previous owner! Cheers for making these videos.

[@sreviz]

Thank you Siroob. I did this purge today with your video successfully. Unfortunately my fuel pump fuse was not on the driver side fuse box. But instead it was on the bonnet fuse box. Even though when I removed the fuel pump fuse the engine was still running. So, what I did was connected the return line to the feed line, so the pumped fuel went back to the tank again -when the engine was started and running. Thanks again.

[@jezchazania1336]

Thanks SiRobb did my XC90 today. Didn't get as much crud in the filter as you but deffo runs better 👍cheers for your helpful tips.

[@m.ignaski2730]

Sirobb, I just discovered your channel not so long ago. You've inspired me to do some jobs on my car of exactly the same make and model. I also watched other vids about Diesel Purge and amount of filth coming out of the system is really surprising. I've done Diesel purge on my car using your method and I got even more surprised in a good way I think. There was no filth what so ever on my car! Nothing but super clean remains of liqui moly. How is it possible? My car has done 125k mliles.

[@Ascottie75]

Hero! another great video mate. I wish you lived closer to Essex. ;)

[@scopex2749]

Just bought another V70 D5. It is slow to start and acceleration is poor so I am going to do a purge when Im off shift. This stuff WORKS SUPERBLY! Pretty sure the injctors are dirty. Ive aso put Wynns Gold Fuel system cleaner in the tank. Used this before and it removes a lot of crud.

[@stevem6008]

Diesel Purge stopped nailing in my Mercedes 240D. The engine also idles smoother.

[@PARDS2]

ENJOY ALL YOUR VIDEOS--VERY HELPFUL!!!! IF YOU FIGURE OUT THE PRESSURE NEEDED AND HOW TO DELIVER IT, PLEASE DO A DIESEL PURGE ON A COMMON RAIL DIRECT INJECTION MOTOR MOTOR

[@PittwaterMowing]

Thanks for making this video. Its very informative

[@vov9261]

Great video. Just done it today on XC90 2004. 161k on the clock. Fuse 21 in engine bay. Half way through I stopped for half an hour and after started again. Liquid at the end was as clean as in a beginning. Filter was clean as well. It could be shell fuel.

[@honorkemp]

yes same with my car

[@herberthoppe68]

nice job. thank you for the video

[@scopex2749]

superb video Ive just bought a D5 V70 thats developed a misfire between 1500 and 2000 rpm and has gone into 'wimp mode' TWICE! Ive NEVER had a petrol manual Volvo EVER let me down on the motorway. Changed the fuel filter, new battery (as old one was causing a lot of fault codes) but STILL misfiring. I am a mamber of VPCUK 'Tee5alive'. Off to buy some liquid Moly! thanks

[@timmorodgers4271]

Did it work? I;m considering it for my V70 D5, Misfire and "pinking" under load between 1500 and 3000 rpm.

[@citrusfarmer]

Great video. thank you.

[@spoonforthought3534]

Great vid!

[@clivewilson5897]

Spot on again

[@m.ignaski2730]

Sirobb, Is there a way and need to clean intake manifold out of that black goo? Thanks for your vids? Pleasure to watch

[@AK-sv4kb]

Nice video. Could you tell me what's the difference between liqui moly diesel purge and another product called liqui moly diesel additive which we add to fuel tank . Both claim to do the same thing . Also there is a liqui moly injector cleaner ! Why so many products to do the same thing. Is there a difference between these ? Please explain

[@kirwanjohn101]

Tried to do this on an opel corsa 1.3l diesel but it would not work. I believe that the fuel needs to be pumped into the injectors using an external pump running at 4 bar. Ended up having to empty the diesel fuel filter and then refill using the diesel purge and then run the engine. Not as good but did the job in the end.

[@igormazepa420]

Great video, thanks.. I have the same diesel d5244t 163hp, could you write me catalog number of filters and liquid, thanks a lot

[@Carsandnature]

On the d5 xc90 is there anything stopping me removing the air pipe and putting the feed straight onto the pump or is it best to have a length of pipe with fuel in before the purge feed pipe

[@chriswilliams2652]

Cheers from across the pond.What if the HPIP is mechanical? Mine is chain driven by the timing chain (mercedes om648). I think LM makes a similar product by the same name that goes directly into the fuel, at least it says" add to fuel"on the can. Perhaps that might be my answer. I also watched a video where you fill your new fuel filter with the product and run it. That was a video done by liquimoly as an optional method to the one you demonstrate. Thanks again from the colonies

[@reggieascott]

Great review; can you recommend a method for purging the later D5 185 model? Can I just pour the product directly into the fuel tank?

[@claytoncordell6112]

Can this method be used on bmw 320d e93, thanks

[@honorkemp]

tried diesel purge liquid moly with this filter on my 2010 tdi vw passate 147000 miles did not get any black residue only a more golden colour to the jar of moly

[@1968krug]

If I’m not mistaken, I simply poured a bottle of the LiquiMoly Deisel purge into the fuel tank. The result was excellent. Rough idling and sluggish performance is sorted.

[@sirobb]

That's not how Diesel Purge is designed to be used but if you got a positive result, well done.

[@Thunaraz]

It is, you can do it both ways

[@vaskodimoski5690]

This stuff can also dislodged things from fuel lines which get stuck in side small injector holes and do more damage the stuff in jar is from fuel rails not injectors

[@MontyDogK9]

Hi Sirobb In the video you say about not letting air going in the fuel pump when you reconnect the fuel line, but what happens when you connect the fuel pipe to the new fuel pipe which then goes to the jar of diesel purge, as that pipe and filter is full of air? Thank you.

[@sirobb]

Yes, there's obviously going to be moments that air is present when changing fuel connections. Air can also be drawn in when changing the fuel filter during a service or if you run out of fuel on the road. However, you don't want bad connections to allow a steady stream of small air bubbles running through the pump for an extended time. The odd second here and there isn't a problem. Make sure you prime the Diesel Purge feed hose and filter as much as you can before starting the engine to minimise the air present.

[@maciejnawrocki4922]

Great video. Clear explanations and no uncessary talking. Im planing to perform air intake cleaning, injector cleaning and engine flush. Any recomended sequence? Was thinking, air intake first followed by injectors and engine flush to clean all inside.

[@m.ignaski2730]

Hi Maciej. Let us know how you got on with intake cleaning. Perhaps take some pics or short video maybe... Good luck mate!

[@arcadeuk]

This doesn't work on the Euro5 engines as they require the fuel to be supplied at pressure from the tank (as you say in the description) So I drained the last of the fuel tank, when I had the fuel filter out for a change and put 100% diesel purge in the tank. I had quite a misfire before, it runs like a new engine on 100% diesel purge. I am just hoping that this continues when I put some more regular diesel in. I will probably treat it to some of the fancy stuff on my next fill

[@AdammP]

What's the best way to bleed the air from the purge feed pipe when plumbing it up to the high pressure pump for the first time, as it will surely have some air ? Great video thank you

[@sirobb]

lelelel cya BRO If you want no air whatsoever, you attach a vacuum pump to the return line to draw the Diesel Purge through before starting the engine.

[@adriankiraly5172]

Best thing since sliced bread!

[@Eminem2011Fan]

@SiRobb will this setup work on my 2008 v70 2.4 diesel

[@pphilpot]

Great video. Thanks. What size is the external diameter of the Volvo fuel lines? I'd need to buy some replacement spring clips (or jubilee clips?) before I pull it to pieces. Also I note that you didn't clip the joints - did you use 8mm connectors?

[@sirobb]

Thanks. 👍 You need 12 or 13 mm I.D. clips (sorry I forget) to secure the lines afterwards. I used 8mm straight connectors and didn't feel the need for additional security of the join due to the quality of the hose. It gave a really snug seal but if you use thinner hose or poly piping (not recommended) you may be better to clip the join.

[@scimitar123]

Do you prime the intake pipe and filter before the HP pump? Presumably some air will inevitably get into it?

[@sirobb]

scimitar123 Not priming will introduce air for a couple of seconds but you can prime first to eliminate any air.

[@stephen6713]

hey buddy, can you comment on whether this is OK on a Volvo C30 D3 2.0 2011 registration? Was considering just adding to the fuel tank when its low of diesel.... any help appreciated and thanks for the video!!

[@sirobb]

Stephen Pemberton You wouldn't really get any benefit pouring this in the tank so would need to do it in a similar way to this video. You would need to prime the hose coming out of the jar of Purge so the hose is full then attach it to the engine's fuel filter feed. You would also need to pull the return hose coming from the injectors and attach it to a hose going back into the jar of Purge. Reconnect everything when you're done.

[@suzeegti6319]

Is the filer you use specifically for diesel cars? Reason I ask is because diesel filters have to stop much smaller particles getting to the injectors.

[@sirobb]

The filter wasn't special. This is quite an old video now and there have been no problems since.

[@p_pea]

Hi there I used this on my D5 S60 2002, the same method as you have in the video, and it has improved how the engine runs. It does now take longer to start when cold though, any suggestions as to why that may be? Thanks

[@bilawalmalik230]

Hey! I know its been 3 years, but I faced a similar situation with my 2012 Hilux Invincible - I added an injector cleaner of a company whose name I dont remember. The next day my cars cold and warm starts had increased a lot. But then I added Liqui Moly's Super Diesel Additive & Diesel Common Rail Additive at the same time in a half tank of diesel and changed the diesel filter. Now the car starts up instantly.

[@markokosir5407]

I have a question. Could this be done when you are changing your fuel filter. You take the old one out pour old diesel out of it, then pour liqui moly diesel purge into the old filter as you would with a normal fuel filter change, to ensure that is starts immediately after the change of filter. But with this method you are still using the old filter in case you wold top it up a few times so you get around 500 ml to 1liter into the system, since I don't know how much liquid goes into one fuel filter. Then you just take your new fuel filter and pour diesel purge in it and finish the job. If more than 500 ml actually goes into the fuel filter you could just do the last step and throw away the old filter immediately and just install the new filter with diesel purge in it.

[@oliverbendt3104]

You could do that but it's not going to catch any of the dirt from the rails or injectors that the moly has moved as it would just circle around and end up back in there again. You would need to put a temporary filter onto the return pipe to catch the crap as it comes back out

[@piotrnowax]

great video instead of using it into closed system can i just pour 5l into fuel tank when close to empty ?

[@sirobb]

Piotrek Nowak I wouldn't recommend using it that way.

[@sylvesterskyes9558]

What's the worst that can happen ? I'm itching to try it on my 320d 2012 BMW....

[@GlossaME]

Did you try it?

[@sgaws]

you could use the inline filter on the return line.

[@sirobb]

I suppose you could if you have no other option but why would you want to?

[@sgaws]

@@sirobb l see that having the filter on the intake is better. I did a purge today on my Kia Pregio diesel van. Now running a bit smoother but still has a knocking sound.

[@elshadajdooel4367]

How to conect this on mercedes 220 cdi

[@sirobb]

elshadaj dooel Same as any car. One pipe feeding the high pressure pump and one pipe collecting from the injector return.

[@davidbenjamin9509]

Q.? The inline filter goes in-between the feed hose in the direction to the fuel pump which then goes to the fuel injectors then back through the return which just sits in the liqui moly diesel purge.....?

[@sirobb]

Yes

[@JohnDoe-ql5mi]

Very nice. I do the Liqui Moly Diesel Purge on my Nissan Patrol every 6 to 8 weeks (see my videos). The engine runs very nice.

[@Adnan2492]

I got Volvo D5 I did connect every thing right but couldn't start the car. I connect the fuel lines back and it start 1st time ...

[@sirobb]

Which D5 do you have?

[@Adnan2492]

2009 s80 5 cylinder 2.4L D5 I got 265k km on it and wanted to do the diesel purge but I doesn't start at all

[@sirobb]

Please read the video description.

[@gheorghinacov6008]

@@Adnan2492 The reason Euro 4 version of the D5 engine cannot start without the in tank pump is because its high pressure pump doesn’t have a low pressure mechanical pump as the HP on the Euro 3 version. You can see that on the Euro 4 the pump is made of 3 main parts whereas on the Euro 4 only 2. Can you confirm that, Sirobb?

[@mmuhiuddin]

Dear Sirobb, you mentioned the D5 185 (which I happen to have) in your description. Do you think it is worth a go on that or is it likely to harm it or be a total waste of time and resources? If so, do you know an alternative for that model?

[@sirobb]

You can try but ultimately, if it's not going to start, there's no point straining the battery and starter for no benefit. You can buy 5 litre tubs like mine for about £40 so you could run your fuel down to minimum and pour the 5 litres in the tank. If you do this, you would be better to have a new fuel filter fitted afterwards as the Purge will disturb sediment in your tank and could block your old filter.

[@mmuhiuddin]

+sirobb Thanks for your reply. What if I run down the tank to almost empty, then use a vacuum pump to remove whatever remaining Diesel I can from the tank, and then put the diesel purge into the tank, how does that sound? what else would I have to do at the front end to catch the used purge, etc?

[@sirobb]

+mmuhiuddin Rather than messing with vacuum pumps, you could just disconnect the tank to fuel filter hose and turn on the ignition. The in tank pump will then pump the diesel out for you into a clean container to re-use after you've done the Purge. You don't have to catch the returned Purge fluid as it's automatically returned to the main fuel tank for recycling through the system over and over until it's all used up.

[@mmuhiuddin]

+sirobb Okay, that sounds good. I was just thinking that pumping it out will help avoid running the last bits of fuel, which I have heard is not healthy for the car, through the car's pump, but rather take it straight out of the tank. I'm not sure id this will have any relevance to the sediment you mentioned in your first reply though. In any case, what's the minimum amount of purge you recommend I put into the tank after emptying it, and how do avoid any risk of it running dry? Also, after the whole procedure, I should pump out any remaining purge in the tank and put some diesel in, let it run for a couple of minutes and then change the fuel filter? Thanks again!

[@sirobb]

+mmuhiuddin Doing it this way, I would imagine you'll need at least 5 litres of Purge and how you deal with it afterwards is your choice so I won't recommend a particular procedure but leaving whatever Purge is left in there and filling the tank with regular diesel shouldn't be a problem. Have one maybe two new fuel filters available too. I have never done a Purge from further back than the engine bay though so you will know as much as me. As I've mentioned, there are potential issues with using Diesel Purge in the tank so everything you choose to do is at your own risk.

[@elshadajdooel4367]

Can l use for mercedes 220 cdi 2002?

[@sirobb]

elshadaj dooel You can use it on any diesel.

[@elshadajdooel4367]

Is this can solve leaking injectors?

[@sirobb]

elshadaj dooel I haven't fixed a leaking injector using Diesel Purge.

[@robertsimpson7113]

Why not run a filter on the return line also to help to keep contamination from your supply container (glass jar)??

[@sirobb]

Robert Simpson .....what would be the point of that?

[@robertsimpson7113]

Double filtraton!!! Like I asked initially...TOO KEEP CONTAMINATION FROM YOUR SUPPLY CONTAINER.

[@sirobb]

Robert Simpson A single filter works fine so I see no additional benefit in adding another. Why are you wanting double filtration? Why stop there? Why not have triple, quadruple, quintuple filtration?

[@robertsimpson7113]

Now your just being foolish.......

[@sirobb]

Robert Simpson I'm just following your logic on additional filtration. I've never seen anyone use more than one filter so it seems that I and the rest of the world are happy with one filter but you are not. Perhaps you could make a video explaining your theory and show us why we're mistaken.

[@khassan1595]

Would this method work on a 2006 BMW 335d

[@sirobb]

It's for any diesel.

[@khassan1595]

@@sirobb Thanks. Was only asking as I'd seen comments on another video saying it might not work with bmw

[@Richard_L_Y]

Should use a paper filter for the feed. Two filters good though.

[@sirobb]

The filter I used was fine for the job.

[@Richard_L_Y]

@@sirobb Try it with paper / cardboard and you'll see what it takes out by the change in colour...

[@Matty72UK]

Hi Simon, I'm going to do this. Two questions if I may. The little white hose to hose connectors, are they easily available? What sort of size/specs are they? The dirty Diesel purge at the end. Is it really advisable to put it back in the tank if that dirty in your opinion? Thanks mate

[@sirobb]

Matt B As mentioned in the first part, my hoses are 8mm internal diameter but you need to check your own car if it's a different model. 8mm is most common but 6 and 10mm are used also. Thr hose connectors are available off the shelf in Halfords or from whoever you buy the hose from. The state of the purge liquid at the end can vary dramatically but if you filter it, there's no reason why it can't go in the tank.

[@Matty72UK]

SiRobb Thanks. I've ordered the connectors. I have a S60 d5 2002 with a dodgy Dim! Just being thick for a minute. Does one take the fuel pump fuse out just once at the beginning and put back in at the end? Or is it just for initial depressurisstion and put back in when running the Diesel purge? Otherwise how is it pumped into the rail? Maybe I missed that bit! Also, I didn't quite see, is the return feed immersed in the diesels purge in the jar or, because of partial pressures of liquid into liquid, out of the DP and allowing gravity to let it flow out into the air and collect in the jar. Thanks. M

[@sirobb]

Matt B You disconnect the in tank fuel pump fuse for the duration of the purge. Whether you suspend the return or immerse it is up to you. So long as there is a constant flow, it doesn't matter.

[@Matty72UK]

Thanks. You're a star. O the in tank pump, gotcha! Looking forward to any improvements! Have 122k on the clock not sure if the injectors have ever been purged! Guess proof is in the pudding.

[@Matty72UK]

@Paul Panther long time ago but I definitely think using the diesel purge worked wonders!

[@georgechristoforou991]

Is it possible to run your tank out of diesel and add it to your empty tank and purge it.

[@sirobb]

George Christoforou It's possible but I wouldn't want a detergent in my fuel tank which is why I only do it like in the video.

[@kandakumar4376]

Can I add it into fuel tank only

[@sirobb]

See the pinned comment.

[@kandakumar4376]

@@sirobb thanks

[@cernos32]

Where do you stay mate?

[@sirobb]

Stay?

[@cernos32]

@@sirobb i mean where do you live, what town, so maybe i will be your client, i kinda sacred to work on my Volvo by myself , i mean engine

[@sirobb]

I'm in Cheshire.

[@cernos32]

Ohh, i am from west lothian scotland

[@Filipcarmin]

Made in Germany

[@swifttalyordongre8196]

Y u r showing material if u dont want to show demonstration,give only commentary

[@sirobb]

?

[@Birdfeeder795]

Did you watch the whole video? It’s a DIY video showing what you need, how to do it and end result. Stop reading just the headlines and watch the whole thing. Jesus.