[Shotimes] Oil blow-by?

[Leigh Smith]

Why?

> I plug my PCV input hoses.......
>
> Paul Nimz
> '97 TR
> '93 EG mtx
>
>
> ----- Original Message ----- 
> From: "Leigh Smith" <leighsm@comcast.net>
> To: "Mark Mucher" <mmucher@bellsouth.net>; "'Shotimes@Autox. Team. Net'"
> <shotimes@autox.team.net>
> Sent: Wednesday, June 16, 2004 5:59 PM
> Subject: Re: [Shotimes] Oil blow-by?
>
>
> > I'd certainly check all the things everyone mentioned, but it is also
> > possible the rings are just getting tired by now. You didn't mention
> > mileage, but I'll assume it's 100k or more by now.
> > Old solid lifter "musclecar" engines had a serious problem with blow-by,
> > even when brand new and properly blue-printed, because the pistons were
> > forged and installed so "loose". They would literally puff smoke from
the
> > valve cover fill cap if you opened it and disconnected the PCV. The SHO
is
> > built MUCH tighter, but with those miles your rings are still well worn.
> To
> > check, pull the PCV hose, and vent hose, and open the oil fill cap, and
> see
> > how much smoke or puffing you get. None would be ideal. Put the PCV hose
> > back on. Make sure the hose itself pulls a vacuum. Then hold your hand
> over
> > the cap opening and check to see if the system can pull a vacuum thru
the
> > crankcase while the engine is running.
> > Blue smoke that only appears at full throttle means the same thing.
> > A more sophisticated test would include a leak-down tester.
> > Race cars run vacuum hoses from the header collectors to get big vacuum
> > readings inside the crankcase, even at full throttle.
> > I remeber tests where that alone was worth 20HP.
> > Lee
> > ----- Original Message ----- 
> > From: "Mark Mucher" <mmucher@bellsouth.net>
> > To: "'Shotimes@Autox. Team. Net'" <shotimes@autox.team.net>
> > Sent: Wednesday, June 16, 2004 8:58 AM
> > Subject: [Shotimes] Oil blow-by?
> >
> >
> > > I posted this on TechSHO but didn't get any bites...
> > >
> > >
> > > My "new" '90 has some damp oil spots on the top of the engine
> > >
> > > One area is to the left of the filler cap and another is towards the
> front
> > > of the throttle body on the intake joint.
> > >
> > > It kinda looks like the crankcase is not venting properly.
> > >
> > > Any ideas?
> > >
> > > (pix available)
> > >
> > > Thanks,
> > >
> > > Mark
> > >
> > > ---
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