<VV> serious problem with my turbo engine

[corvairduval at cox.net]

Shall I assume that 10 as a compression reading is bar (atmospheres)?

If so, then you have 5 cylinders at 147 psi, and one at 31 psi. Yes, there
is a problem. Once you removed the valve cover and saw the long spring, I
think you are in the right place.

A fallen valve seat that is still in one piece usually results in a short
spring, as the valve is not seating against the seat/head in the usual
position. A long spring means the valve is seated further than the usual
seat area, or the keepers have fallen off the valve, letting the spring
free. A valve seating further in the head than usual probably means the
seat fell out and broke into small pieces. These pieces will travel into
all three cylinders on that side (in rare cases they will go through the
exhause crossover into the other head) and into the turbo!

Remove the rocker from the long spring. If the keepers have not fallen off
the valve, then remove the head. 

Write back with what you find.

Frank DuVal


Original Message:
-----------------
From: Ulli Dittmar info at california-camping.de
Date: Mon, 23 Jul 2012 20:09:32 +0200
To: info at california-camping.de, virtualvairs at corvair.org
Subject: Re: <VV> serious problem with my turbo engine


and the biggest problem is that the German MotorVision TV wants to make a
complete show with the Corsa - the set will be mid of September, air play
is October 01. - the shows name is "Classic Rides" and is all about Corvair
as one of the first turbo cars,. A friend from North Germany is coming down
to Muich with his 64 Spyder and mine would be the one for the LM series.
If i can not get the problem solved they will skip and promote Porsche as
one of the first Turbo cars - what a shame.

Regards
Ulli the Ba-Vair-ian

---------------------------

61 Monza 900 Sedan
65 Monza 110 Coupe
66 Corsa Convertible
86 Porsche 356 Speedster Kit Car
91 Porsche 964, C4
90 Porsche 964, C4
62 VW Split Window Bus
65 VW Split Window Bus

Am 23.07.2012 um 19:54 schrieb Ulli Dittmar:

> Hi folks,
> 
> it started about 2 month ago. the engine was running worse and worser.
> I went to a friend and we tested the compression. All cylinders show a
reading of 10 except no. 5 (the right side, last cylinder view from back)
only gives us a 2.1 reading.
> I took off the head cover today and the inlet valve spring is more than
lose, I can turn it around by hand and can even push it (compress it) by
hand.
> Since it is the first time I am working on a Vair engine I am really not
sure what to do - please help - I am confused.
> What can cause this problem and can it be a fallen/loose seat. The spring
also is much longer than all the others.
> 
> Any help is appreciated
> 
> Regards
> Ulli the Ba-Vair-ian

--------------------------------------------------------------------
mail2web.com - Microsoft® Exchange solutions from a leading provider -
http://link.mail2web.com/Business/Exchange