Author Topic: vacuum (Read 2092 times)

ClodKing · « **on:** April 25, 2008, 12:20:51 PM »

How many vacuum lines are there on the M42??

I asked for part numbers on bimmer forums, and was told to come here.

I was on realoem.com, and I could only find two part #'s for a vacuum line, and found a good dozen or so for coolant lines...

I though I saw for sure atleast 3 vacuum lines... howcome I cannot find them on realoem.com??

Any help would be great.

tjts1 · « **Reply #1 on:** April 25, 2008, 12:37:13 PM »

Nobody knows for sure but its a lot. Some of them double as both vacuum and coolant hoses. Others don't.
http://www.m42club.com/forums/showthread.php?t=2742
The problem is bmw created a coolant circuit from the side of the head to a pipe underneath intake manifold to run hot coolant through 4 heat exchangers. 2 for the throttle body, 1 for the idle control valve and 1 for the crankcase ventilation. The last 2 involve both coolant and vac hoses some of which are cross overs.

Frankie · « **Reply #2 on:** April 25, 2008, 02:03:17 PM »

I ripped of the throtte body heater hose mess and only 2 vacuum lines remained.

PaulC · « **Reply #3 on:** April 26, 2008, 12:19:45 AM »

I call it Medusa's wig.