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Engine diagram 96 vw passat vr6
PCV valves aren't common on European cars, instead they regulate vacuum flow by connecting a small diameter hose to a very small hole in the intake manifold or throttle body.
The other end of the hose is typically connected to the top of the engine at the oil mist and flame trap which is usually inside one of the cam covers. The main engine crankcase breather hose typically also connects there and sometimes is connected to the air cleaner side of the air intake and sometimes directly to the air filter housing.
The small hole generally needs checking during maintenance as they frequently become blocked. The hole is something like 5/64 inch but mostly it is beneficial to enlarge it just a little, say to 3/32.
Sorry can't advise you about the diaphragm valve...
on Dec 16, 2017
I have a 1996 VW Passat Estate 1.9TD the battery
A fully charged battery should read approx 12.6 volts. When you check the voltage of a running vehicle, it should read approx 14.5 volts or so. If it doesn't, you are not going to charge. You are most likely driving around with a junk alternator, and if it has a bad regulator, it will discharge your battery. Most auto shops will test alternators for free!
on Oct 02, 2015
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