<VV> Re. Re: Here we go again (Total Seal)

[Duane, Jim (US SSA)]

FWIW, I did notice an appreciable difference in vacuum, but the stock
rings in my engine were gonzo!  I noticed the smoke stopped bellowing
out the oil cap, though!
	I also played with the crankcase vacuum line, removing it (and
the restrictor) to determine if the reduction of vacuum had an effect. I
need to get a plug for the oil line before I try my "oil-less" hot idle
test.  Could the pulses in the intake cause the turbo inlet seal to see
varying vacuum and that in effect causes the oil leak?  Is this
complaint just from turbo owners? Is Crawford offering Craig and me his
turbo to run the hot idle test?
	Come to think of it, we have a member in our local with a spare
turbo...AHA!  A lot safer to try another turbo than to run mine dry!
;>)

JED

A SMOKIN' '66 180 Corsa CVT
Colonial Corvairs
CORSA
    

-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of Bob Gilbert
Sent: Monday, March 05, 2007 12:03 PM
To: cwiland at zzz.com
Cc: virtualvairs at corvair.org
Subject: Re: <VV> Re. Re: Here we go again (Total Seal)

Howdy Folks, 

To a note, I used Total Seal rings in 650 Yamaha back in the mid 70s. I 
had installed a pcv valve to replace the road draft tube. After the 
engine rebuild, because I wanted to not that it was worn out, the valve 
clicked, I guess because of increased vacuum. Better seal, more
vacuum???

Bob
cwiland at zzz.com wrote:

> Crawford said:
>
> "I recommend that the fellow with the leaking turbo carbon seal 
> replace the
> seal where he has seen that he has oil in his intake. It doesn't make 
> sense
> that the increased engine vacuum is causing the problem and I would
> certainly not change the engine's piston rings because the turbo is 
> leaking
> oil!  Also, you may be permitting gasoline to wash into your turbo 
> bearing
> by continuing to run the turbo with a bad carbon seal."
> -----------------------------------------------------
>  I have rebuilt my turbo with new seals and according to the shop  
> manual. I suppose I could have screwed that up but everything was set

> up to specs in the manual. I have read of increased vacuum causing  
> this problem in Hugh McInness" book about turbochargers, so it does  
> make sense to me. Remember, the problem shows up at extended idle  
> periods where the vacuum is highest.
>  I also don't think much gasoline could get past the seal since it is

> on the intake vacuum side of the seal.
>
> Craig
>
>
>
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