[Shotimes] Oil blow-by?

[Mark Mucher]

Me too!

Also, I don't know that I have blow-by - I'm just trying to explain the oily
spots on the motor.

(No smoke on hard acceleration, BTW.)

Thanks,

Mark

P.S. Paul - I got some Auto-RX but haven't put it in yet, 'cuz it's full...
 

-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Carl Prochilo
Sent: Thursday, June 17, 2004 9:09 AM
To: Paul Nimz
Cc: shotimes@autox.team.net
Subject: Re: [Shotimes] Oil blow-by?

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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