VW Golf mk4 TDI ALH gets new vacuum lines and N75 valve install

[@oldworldchris4187]

Nice repair, I'm working on the same thing with my TDI.

[@Corysdiyauto]

Thanks!

[@dmcdow]

Great video, Cory! If you find a source for the plastic clip under the vacuum pump, please post the part no. All three of mine are gone. I really look forward to watching your videos.

[@vwvwso4176]

Awesome video! Thank you!

[@Corysdiyauto]

Thank you!

[@kristiansvilcans6850]

I will do this also, but I will get blue silicon ones👍🏻

[@sretenzivkovic6964]

Bad 75 valve can be fixed with blast of teflon spray in all lines, before had limp mode and strange noise on turn off engine.

[@bronniesboy]

Did this fix the problem

[@SoloPetru]

Amazing, thanks for the video!

[@Corysdiyauto]

You're welcome!

[@supportua4608]

Thank you work

[@skin-kneesue2868]

Thanks for the video, I'm having great difficulty getting the vacuum hose on a connector behind the fuel lines along the firewall. Any suggestions how to get back there? Thanks

[@Corysdiyauto]

Look for a simple way to maneuver around things. You might have to remove a few hoses to access it. Just have patience!

[@unwarranted6898]

Your check valve is in a different spot compared to the factory diagram. Why is that?

[@gianlueffe6844]

Great Video! Today I replaced all of them with just the 3mm hose and now the car is not going as it should.. Would you mind to write down or suggest/make a video of how hoses goe, but all of them, and which ones are the 3mm and the 5mm ones.. PLEASE

[@Corysdiyauto]

Thanks! I highly recommend replacing one hose at a time so that you don't get confused. The smaller fittings will only work with 3mm hoses and the larger fittings will only work with the 5mm hoses. I will eventually try to make a video showing the differences.

[@gianlueffe6844]

Would be great mate I stay tuned! By the way, today replaced all of them expect one and it's the one from the turbo that goes to the n75

[@Corysdiyauto]

@@gianlueffe6844 - Make sure you replace them all. Mine were in bad shape, especially the one going from the turbo to the N75. Thanks for watching bud!

[@andseraf8544]

Look into changing the vacuum pump seal ..

[@Corysdiyauto]

and seraf - I actually have a video on this: kzbin.info/www/bejne/e5PSi4GEm9h7iq8

[@mountaincaaatsm603]

Why did you decide to replace the valve? Maybe I missed explanation in the beginning.

[@Corysdiyauto]

I just decided to do it while I was in there. It's not necessary, but since it was about 20 years old, it was only a matter of time before I needed to replace it anyway.

[@vampir335]

you need to replace the seals on that vacuum pump.

[@Corysdiyauto]

Yes, I know. Here's a video on that if you're interested: kzbin.info/www/bejne/e5PSi4GEm9h7iq8

[@TIIRONC5H]

I dont have it in my tdi golf that ball u connect vakum line at midlle engine

[@Corysdiyauto]

Do you have the same engine (ALH)?

[@TIIRONC5H]

@@Corysdiyauto i.9 tdi injector pump like yours idk

[@Corysdiyauto]

What year?

[@TIIRONC5H]

@@Corysdiyauto 1998

[@Corysdiyauto]

@adolg4049 - You have an AHU engine and not the ALH like mine. That's why yours looks different.

[@zalanocsko154]

hi, what diameter pipe do you need?

[@Corysdiyauto]

You'll need 3mm and 5mm. I have it listed in the description too.

[@leshileshi1959]

Ce mode de livraison s'applique-t-il à 1.9tdi 150cv ARL ?

[@Corysdiyauto]

I'm not sure because I am not familiar with that engine setup. It may be similar?

[@leshileshi1959]

@@Corysdiyauto Thank you

[@vwvwso4176]

Could you help me find where a line goes if I showed you a picture? I only need 1 line to connect

[@Corysdiyauto]

Which line? Is it a 3mm or 5mm?

[@vwvwso4176]

@@Corysdiyauto there is no hose but if you go search "vacuum line hookup 1.9" on the tdi club forum my post will show up. I don't know what else to do or how to solve this problem haha

[@vwvwso4176]

It's the 2nd picture on the post.

[@Corysdiyauto]

Ok, so that's the anti shudder valve solenoid (ASV). The hose is 3mm and connects to the ASV over on the EGR valve. It's a short hose. I hope that this helps.

[@vwvwso4176]

Thank you so much 🙏

[@abduraghmansage6563]

Thanks guys very helpful appreciated

[@RinosaurPravi]

does any of these vacuum lines are connected to braking system or smth? Because yesterday one of it popped off and my brake is kinda hard now, I ordered new so I can change them

[@Corysdiyauto]

There's a large line that runs from the vacuum pump to the brake booster. Is this the line that you are referring to?

[@RinosaurPravi]

@@Corysdiyauto idk really, yestrrday i took a part air filter and maf sensor and i saw that 2 pipes were disconnected, i connected them, and today while i was driving i noticed that my brake is kinda hard and its breaking slower

[@Corysdiyauto]

Make sure that the hoses that you connected are in the right location.

[@RinosaurPravi]

@@Corysdiyauto ok thanks

[@Bircan1]

Moin If I go full throttle without paying attention to speed 120/130.140 the vehicle shuts off the gas, it gets better when I turn the ignition off and on again and the same problem occurs when I step on the gas pedal. What could it be, there is no problem with my turbo

[@Corysdiyauto]

Is your check engine light on?

[@Bircan1]

@@Corysdiyauto no

[@Bircan1]

@@Corysdiyauto at low revs it pulls well, but after 3000 revs the gas stops

[@Corysdiyauto]

@@Bircan1 - Check all of your vacuum lines, especially the one going to be turbo. The vanes might be sticking.

[@Bircan1]

@@Corysdiyauto Ich habe einfach alle geändert und es funktioniert immer noch nicht

[@petruadrianpatrascu6239]

Hello, how many meters are necessary for all?

[@Corysdiyauto]

You will need about 3 meters of the 3mm hose and about 2 meters of the 5mm hose.

[@petruadrianpatrascu6239]

@@Corysdiyauto thanks a lot. 🍻

[@zackscott6260]

If I do this will this help with my p1556 code

[@Corysdiyauto]

Zack Scott - Yes, it could. The N75 could be bad or your VNT could be stuck/sticking.

[@vampir335]

@@Corysdiyauto VNT?

[@Corysdiyauto]

@@vampir335 It stands for "Variable Nozzle Turbine" and this vane mechanism can jam from carbon build-up. This is why it's important to accelerate hard once in awhile to clear some of the carbon out and allow the turbo vanes to move more freely. I hope this helps you.

[@kc03300]

did yiu change the line to the ecu. did you haveto remove it from the drip pan under the winshield

[@Corysdiyauto]

There's not a line in the ECU on the mk4's. I think you are referring to the mk3's. They had the little vacuum line in the ECU.

[@ziedjbali1242]

Thank for the vid.. but im wondering if the size is 3mm and 5mm.. Think they should be 2mm, 3.5mm Can you confirm.please where did you get those size

[@Corysdiyauto]

The sizes are 3mm and 5mm. www.idparts.com/3mm-idvacuum-hose-n203531-p-620.html

[@isabelnievas4886]

Geometry variable?

[@Corysdiyauto]

Isabel Nievas - What do you mean by that?

[@nateflorea9009]

@@Corysdiyauto VNT or not, and the answer is probably yes

[@Corysdiyauto]

@@nateflorea9009 - Gotcha, and yes it is a VNT (Variable Nozzle Turbo).

[@Puka-zw8sx]

I asked for lines at the car parts shop and the guy gave me 4mm...

[@Corysdiyauto]

Puka 6000 - Didn't they have 3mm or 5mm?

[@Puka-zw8sx]

@@Corysdiyauto I went to another shop and bought 3mm and 5mm but after i checked all the lines from the car i found that 1 that conected to some valve broke along with the plastic from the valve, and i am trying to replace that now

[@Corysdiyauto]

Puka 6000 - The plastic gets brittle with age unfortunately. I was a little worried when I replaced my vacuum lines, but I luckily didn't break anything.

[@Puka-zw8sx]

@@Corysdiyauto It was broken before i bought the car i think, but still your video helped me a lot thank you!