[Shotimes] Oil blow-by?

[Carl Prochilo]

I guess I'm in the camp that doesn't understand this.  Would you please
elaborate why you do this?
-- 
Cheers,
Carl Prochilo
92 Ultra Red Crimson

On Thu, June 17, 2004 1:33 am, Paul Nimz said:
> 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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