4JX1 Engine-RPCV Removal, cleaning and refitting.

[@basketcasebuilds5712]

The piston cooler control valve is another spot you can loose oil when sitting over night. The rail is supposed to hold around 30 psi sitting static but mine was only holding 8 psi. Making a long crank time to build back pressure on the rail. Thanks for the video. Engine out job for that valve change😮

[@thejackaroo4WDcampingchannel]

The oil rail end cap seals can leak oil and you'd only notice when the pressure drops and it is hard to start.

[@basketcasebuilds5712]

@@thejackaroo4WDcampingchannel Yes there are many areas they can leak. I resealed my rail and made up a rough tool for getting the end caps off. I pressurised the oil rail system with air and that is how I found the piston cooler check valve was weak and leaking.

[@9999999997119]

Good job mate i might try this..just had injectors rebuilt due to diesel and oil mixing. Now its not starting. Ill try to remove rpcv will buy 21mm socket first

[@thejackaroo4WDcampingchannel]

Buy a special tool from Chris who runs the 4JX1 Decompile/ project FaceBook Channel, they work best.

[@thejackaroo4WDcampingchannel]

Badly running engine to non- starter

[@colkerrystravels]

looks easy enough I should be Capaul of doing it one handed as I must, thank you

[@thejackaroo4WDcampingchannel]

I just had a brief look at your channel, I take my hat off to you sir. Your comment got me wondering and I just love how you just get on with life. Nice job and thank you for your comment. If I can ever help you, please just ask.

[@cometa400]

I had to replace mine the part from a ford 7.3 powerstroke diesel fitted and ran fine no modifications needed, hard finding these from isuzu or aftermarket

[@thejackaroo4WDcampingchannel]

They aren't that difficult to find but it is good information knowing that the Power stroke version works okay. You can buy these from any Caterpillar dealer for around $700, Holden can also get them but you'll pay a premium, around $900 and they'll likely buy them from Caterpillar anyway. You should be able to buy them from Ramin Auto Spares in Dubai, not sure of cost. As they are a Caterpillar part anyway, I sourced one at a truck dealer in Dandenong and they had one in stock.

[@sergeyamazar7791]

давно смотрю ваш как приобрел себе исузу бигхорн у вас много полезной информации

[@thejackaroo4WDcampingchannel]

????

[@MiniLuv-1984]

Excellent. When can I bring mine over? Seriously, that was very instructive, thanks. Mine takes a little while to start up, so I figure its probably the RPCV too. Not sure how many 4JX1's are still roaming the streets still which probably means the potential subscribers is fairly small. I really do appreciate your efforts though. Not only do you need to know what to do, how to do it you also have to record it, so massive effort.

[@thejackaroo4WDcampingchannel]

Benjamin, you are more than welcome. The slow starting may not be the RPCV, though. If you think of how the HEUI system works, any number of places could be reducing the oil pressure. It can be anything from using the incorrect oil through to the pickups in the sump. One of the issues I had was that when it was cold, it wouldn't accelerate very well until it warmed up, so much so, I hesitated when pulling out of junctions. That turned out to be a partially blocked CAT.

[@thejackaroo4WDcampingchannel]

I have another video coming out shortly regarding adjusting the alternator belts if I can ever get it to upload.

[@thejackaroo4WDcampingchannel]

Benjamin, sorry to hit you with replies, there are quite a few still on the road, just join the Facebook groups and you'll see. facebook.com/groups/264658247280734

[@MiniLuv-1984]

@@thejackaroo4WDcampingchannel Thanks. That's heartening. I got mine about a year ago and haven't really taken it away yet...stuff gets in the way. I do notice the odd Jack here and there, but they are a pretty rare breed from my observations. Still its a nice vehicle, well kitted out except for cruise control and thats not something that I care about much. I hear they are very good off road, so looking forward to the Christmas "trial run" and actually putting it in low 4.

[@MiniLuv-1984]

@@thejackaroo4WDcampingchannel Watching it right now!

[@ThomasStone-g7t]

What are the symptoms of that nreding doing

[@thesiuslee189]

Very good video

[@thejackaroo4WDcampingchannel]

Thanks

[@pkgoldopalhunting]

where can you buy the new RPCV from and whats it called , my vehicle winds over a long time to start and wont idel when warm cuts out , have throttle to the floor when starting and it finally starts and barley picks up reves very slow as throttel still to floor , o and hve you got contact to chris to get the socket tool for the job as well sorry about all the questions

[@thejackaroo4WDcampingchannel]

RPCV is the Rail Pressure Control Valve and you can buy from Holden (expensive) or from a Caterpillar Dealer (less expensive). Do Not buy from eBay, you'll waste your money. Otherwise, try Ramin Auto in Dubai, email Ibrahim here: [e-mail]

[@gustavostarke4494]

Hello, I have an Isuzu 4jx1 that after several attempts starts but the accelerator does not respond and smokes until after a few minutes it normalizes and starts running perfectly... I can drive for hours without any problem but if I stop the engine it takes two or three seconds to start and if I leave it stopped for two hours it almost won't start. Where should I start the diagnosis? Please I need some guidance at least. Thank you

[@thejackaroo4WDcampingchannel]

First thing is what oil are you using?

[@gustavostarke4494]

@@thejackaroo4WDcampingchannel I'm using 15/40 I asked for api 5/30 and they told me that when the motors are worn out, put this other 15/40. Surely that's wrong...

[@JamesWilson-ef9dq]

Hi, which way round does the pin go? Small point facing the front of the car? Also which way round does the big slide go big hole to the front of the vehicle?

[@thejackaroo4WDcampingchannel]

If you go to the FB group, there's a drawing in the files area. However, I think I can post it in the 'Community' area on here for you. You may need to click on it to get it to show full size. facebook.com/groups/264658247280734

[@irineodeleon6758]

Sir i’m from the philippines i owned an isuzu trooper with 4jx1 engine . I want to have a special socket wrench which you used on removing the RPCV . Please help me , how much i should pay to have this . Thank You & will wait for your reply

[@thejackaroo4WDcampingchannel]

I don't make them but I know who sells them. You'll need to join a Facebook Group called '4JX1 - decompile / learning project' and contact a person called Chris Szkwarek, who is the admin of the group. He sells them, I'll let him know you are enquiring. They cosy around $60 AUS plus postage.

[@henkkiezebrink4023]

Use a spanner 29mm

[@АлександрКарпинский-о8ш]

Супер!!!!❤

[@mikamrema119]

Hello there I have a problem with starting the engine of 4jxi

[@thejackaroo4WDcampingchannel]

I would need more to go on if you are asking for help. Try my email address on the about page.

[@garynew9637]

Cut the white wire, still no start. Tech 2 time or is there something else to look at?

[@thejackaroo4WDcampingchannel]

The white wire trick is to fool the ECU into going into limp home mode. If that does not make it start, my next check would be to remove the RCPV and clean it out.

[@colkerrystravels]

hey I've done the job, my problem is I've messed up my vacuum lines. "HELP"

[@thejackaroo4WDcampingchannel]

No worries contact me via the channel email and I'll send you some info to help [e-mail]

[@mladenmata]

what the wrench is size to remove. thank you to help all of us with this video

[@thejackaroo4WDcampingchannel]

I'm not sure of the size but you need an extra long socket that can fit over the end of the RPCV. Best to get one from Chris on the 4JX1 Compile/ Decompile Project FB Group

[@henkkiezebrink4023]

Use a ring spanner 29 mm

[@thejackaroo4WDcampingchannel]

Yes, you can, but the issue is if you bend the cylinder whilst removing it@@henkkiezebrink4023

[@nizamatdinjarykbassov5711]

Собираюсь исполнить по вашей рекомендации.Двигатель не заводится на холодную.На горячем заводится.

[@thejackaroo4WDcampingchannel]

I had to translate your comment, please consider using English if you can. If you are having problems with cold starting and not when it is hot, I suggest you post on the '4JX1 Compile Research Project' Channel on Facebook. You'll get some positive help there. Here's a link: facebook.com/groups/264658247280734

[@danielzwager7790]

G'day is the rpcv valve the same as a Pcv valve? Mine is suddenly belching thick blue smoke when cold. There is oily fluid in the outlet of the intercooler and it runs like a dog under 1500rpm. It's fine when it's warm. Its got fresh 5w30 oil. This all started when I had a bloke pull the rocker cover off to time the ignition mark on the flywheel following a clutch replacement. Any clues please? Thank you from Dan.

[@thejackaroo4WDcampingchannel]

Thanks for the question Dan, I would think that yes, if you are driving any model of Trooper with a 4JX1 engine, the RPCV is likely the PCV as well. I think it is just a case of people calling it different things. If it were me and the car ran okay before the bloke got in there to time the ignition after a clutch replacement, then I would be looking at that. A lot depends on who it was and what their experience is. The ideal thing is to use a Tech 2 to connect and look at what both the RPCV and the ORPS are doing. The FB Group '4JX1 decompile/learning project' has a list of people and their locations and mobile numbers, that have a Tech 2 if you don't have one. facebook.com/groups/264658247280734 The 4JX1 is a HEUI injection engine and relies a lot on the RPCV, ORPS and the ECU to control how the car runs. I would also look at the injectors with the Tech 2 and run the tests to see if that identifies an issue. Because they can cause a car to run rough at lower RPM and clear up when the engine is running at higher rpm. Regarding belching blue smoke, the oil in the intercooler pipe may well be your issue. It could be coming from the EGR return or the turbo itself. The best way to check is to remove the air inlet pipe to the turbo and see if there is oil there. If there is, then it's likely the EGR and I would fit a decent catch can. If there is no oil there and there is oil in the intercooler then likely the turbo is causing it. I'll be posting a turbo exchange video tonight or tomorrow. I'm uncertain if you know but EGR stand for Exhaust Gas Recirculation and basically, it returns any pressure created by combustion gases bypassing the piston and pressuring the oil sump. We used to vent it to the atmosphere but now it gets recirculated and can cause major issues in car engines that have direct injection like the Jackaroo. EGR fundamentally re-directs these gases so they get burnt in the combustion chamber, a great idea in principle but over the long term they can cause major issues. The 4JX1 engines are getting long in the tooth now and if you have high kilometres, then your piston rings may be worn and combustion gases are getting past the piston, this is called blow by. Those oil filled gases are likely recirculating and burning in the combustion chamber. What is your oil level doing, it isn't increasing on its own is it? I know this is a long-winded response but at least it may help.

[@thejackaroo4WDcampingchannel]

Another word of warning, be very careful buying parts off online auction sites, there are a lot of garbage parts out there that just don't work.

[@danielzwager7790]

@@thejackaroo4WDcampingchannel thankyou for your kind reply. Much appreciated. Just to confirm the bloke who put the gearbox in pulled the rocker cover off to time the injection timing, to confirm TDC when reinstalling the flywheel. I have since put an EGR blank in, cleaned the map port, changed the oil to 5w30 full synthetic. Replaced the air and fuel filter. If I can't find anyone with a tech 2 over here would you be interested in a cash job to look at it? Cheers Dan.

[@thejackaroo4WDcampingchannel]

@@danielzwager7790 Problem I have is that I work Monday to Friday so it only leaves the weekend, where are you based?

[@АнтонПермяков-ц7р]

Самый геморный мотор Исузу.

[@thejackaroo4WDcampingchannel]

I really don't see the point in responding as YT has been banned in Russia.

[@АнтонПермяков-ц7р]

@@thejackaroo4WDcampingchannel да мне пох..й что ты думаешь.