[Shotimes] Oil blow-by?

[Paul Nimz]

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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