[V8] Spectral analysis V8 ABH and PT blocks

[Jason Wilkerson]

Bastian,
  Ingo is right about what I said.  I would change what you said a little and say that the vent system does not 'push' the oil into the intake, but rather the intake is allowed to 'suck' it in through these hoses.  I had once thought about re-routing some hoses to try to reduce the oil consumption - but it isn't that bad for me.  Whoever mentioned a catch can and drain to tank probably has the right idea - although you may be able to use a check valve or something, but I haven't looked at the system that carefully.  I have a PT and it uses oil, probably to the tune of 1qt in 1000miles.  It has great compression, I haven't replaced the valve seals, but I did on my last PT and it didn't help one bit.  I also think that IF this problem gets worse with time or milage it could be due to sludge buildup in some passages, creating more vacuum or velocity in these restricted hoses - but that is just an off the wall theory.  I just think it is normal for these
 motors to use oil and I don't worry about it too much.  

--- On Fri, 12/11/09, Bastian Preindl <bastian at preindl.net> wrote:

> From: Bastian Preindl <bastian at preindl.net>
> Subject: Re: [V8] Spectral analysis V8 ABH and PT blocks
> To: ingo.rautenberg at gmail.com
> Cc: v8-bounces at audifans.com, "Jason Wilkerson" <wilke_jb at yahoo.com>, "V8List Fans" <v8 at audifans.com>
> Date: Friday, December 11, 2009, 9:08 AM
> Hi Ingo,
> 
> is your explanation that the ventilation system pushes oil
> into the engine air intake tract? Wouldn't that imply that
> the whole intake tract is full of oil and that those engines
> should have taken oil already when shipped?
> 
> There was a guy once on Ebay selling "oil consumption
> reduction sets" for ABH blocks - it was a modified
> ventilation hose or something like that, but people said
> it's pure humbug.
> 
> Have there occured any changes on the ventilation design
> explaining why later blocks take less oil and/or why PT
> blocks are not affected?
> 
> Thanks
> 
> Bastian
> 
> Ingo Rautenberg schrieb:
> > Bastian,
> > 
> > Jason was referring to the Positive Crankcase
> Ventilation system as routed on our cars. One of these days
> I'll have to put together a catch can system of some sort
> with auto-return...
> > 
> > Ingo Rautenberg
> > 
> >   
> 
>