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Old 11-09-2010, 04:41 PM
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Zacharias Zacharias is offline
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Join Date: Apr 2010
Location: West Quebec
Posts: 4,025
More on the vaccum bits

Quote:
Originally Posted by franklynb View Post
At the other end of failure
-- too little leakage -- it shifts like a soggy dog -- all over the place, with a lot of flare "mud".
Typically this happens when the VCV is filled with oil, sucked
from the IP around its seal. Stops leaking and starts acting like a shock absorber. <>

The switchover valve only controls the EGR setup, and has NOTHING to do
with the transmssion on 722.11? cars, approx 1978-1980 normally aspirated
616 and 617s. It can be confused with bowden cables because they share a bracket on later models.
Thanks for all the info. Two questions:

1. Is there any way to clean out the VCV? I did notice oil sitting inside the top vacuum line connection. I was hoping it was residue from my recent oil change. Perhaps not.

2. When you refer to the switchover valve, that is a new term to me. You don't mean the white, 3-port vacuum switch on top of the valve cover, do you? If so I don't understand what you are saying... on my '80, the vacuum supply from the main line runs to that, with an offshoot line then supplying vaccum to the VCV....

Cheers
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