PCV valve

Davros

Regular Member
French Zeds
Joined
Dec 19, 2023
Points
13
Location
Midi-Pyrénées
Model of Z
3.0i Z3 Roadster
I got my 2000, Z3, 3.0i a couple of months back from a private sale in Calais with only scant details of previous maintenance. The overall appearance is pristine; it looks well cared for, and a VIN check was clean. But for peace of mind I’m starting a schedule of tasks as a baseline for a regular works programme. I’ve changed the engine oil and filter and over the next few weeks I’ll be replacing the valve cover gaskets (minor seepage) and spark plugs, gearbox and differential oils, Vanos oil feed pipe and fuel filter, and a check on liquids and supply hoses before I travel to the UK in May for a 2500 mile round trip.

I’m also pondering whether to replace the PVC valve and ancillary connection hoses which, according to the BMW maintenance chart I’ve seen, should be replaced after 100,000 miles. The engine isn’t showing any signs of a valve malfunction, but this is my first BMW so I’d be grateful for any guidance about this and a ‘how to’ description would be very helpful too. Thanks in anticipation.
 

AntStark

Zorg Guru (III)
Supporter
British Zeds
Joined
May 15, 2021
Points
136
Location
Hampshire
Model of Z
2002 3.0 Sport
There are 2 ways of doing it, with or without taking the inlet manifold off. The former makes it easier to get to the PCV but is much more involved. If you do it with the intake manifold in place there are plenty of vids on You Tube. As you need to take a few things off it’s a good opportunity to replace other rubber parts at the same time. I am going to have a crack at mine.. also a 3.0. This is for a 5 series but exactly the same except I don’t think you need to move the dipstick. The pipes do get brittle with age.

View: https://youtu.be/vfqPbrl9-os?si=fom_fBbyeX3xK2i0
 

Davros

Regular Member
French Zeds
Joined
Dec 19, 2023
Points
13
Location
Midi-Pyrénées
Model of Z
3.0i Z3 Roadster
Thanks for the video link; won't this be fun; I mean could BMW have designed a more awkward set-up or what!! As they say hereabouts - Bon Chance mon ami. I see from the other thumbnail video link that some of the after market tube/hose connections are a different shape to the BMW OEM parts - which is a bit of a worry. Given that we are way beyond the typical OEM stocks threshold period (I0 years?) I wonder if BMW still stock these items, so part of the fun might be finding replacements that are fit for purpose. Have you sourced a supplier for the replacement parts yet; and if so I'd be grateful for the link.

This is certainly a job that needs doing as soon as.... But meanwhile I'm lucky to have a local garage mechanic who owns a 2004 Z4, so step 1 will be getting him to run a function test on the system.
 

AntStark

Zorg Guru (III)
Supporter
British Zeds
Joined
May 15, 2021
Points
136
Location
Hampshire
Model of Z
2002 3.0 Sport
Febi do a good replacement kit. You can either buy individual parts or the whole kit
This is the whole kit (Febi part# 46303) I matched each of the hoses to the part numbers for my 3.0 on RealOEM so it "should" fit.
Best price I have seen is on ebay at about £90, but that was a UK supplier. You shouldn't have an issue getting it in France though.
You are right about it being a PITA to get to.. but slow and steady and you can inspect the disa and the other hoses along the way.

Given the M54 engine was used in so many cars i don't think you'd have an issue finding genuine BMW parts... just the $$$ :eek:
I should/could do a smoke test on mine but actually this is more about preventative maintenance on a part that is known to give up after 100k miles
 

Davros

Regular Member
French Zeds
Joined
Dec 19, 2023
Points
13
Location
Midi-Pyrénées
Model of Z
3.0i Z3 Roadster
Brilliant. Many thanks for the link and observations. Yes, the BMW mark up is hefty, eh. The local dealership couldn't supply the Vanos oil pipe and their price for a fuel filter was 100€ incl. compared to a MAHLE, OEM, from bmwpartsonline (UK) @ £47 +p&p. With you on the preventative maintenance; and it's good to have an 'in-house' selection of recommended BMW spares suppliers..
 

E-numbers

Newbie
Joined
Mar 31, 2024
Points
3
Have had trouble with this on a couple of cars- N52 and Alpina 3.3, seems like a maintenance “when” rather than an “if”.
 
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