560 Gas thermostatic valve spring

Posted by Chris NW Ind on February 04, 2009 at 16:52:01 from (4.159.233.147):

Just picked up a new spring this morning at $32! I have the 2 owner's manuals and the IT manual, but neither is clear on the installation of this spring. Here are my observations:

With no spring, engine running or not, the counterweight is pointed forward and I believe the valve butterfly is more or less vertical. I can rotate the valve shaft counterclockwise till the counterweight is vertical and I believe the butterfly is closed. When I hold the shaft counterclockwise with the engine running, I feel a significant amount of force tending to rotate it clockwise when I accelerate the motor. This is what leads me to believe the butterfly is closed and the pressure of the exhaust is trying to force it open.

So, my question is, how exactly is the spring installed/preloaded? If I were put it back on the way I removed it, nothing would ever happen. The valve would stay open and the spring tightening clockwise would only keep it open.

I have an engine service manual for the C263 coming, but I’m wondering what you know. I couldn’t find anything in the archives.

Thanks, Chris B.

Replies:

• Re: 560 Gas thermostatic valve spring Chris NW Ind 18:06:13 02/04/09 (0)
• Re: 560 Gas thermostatic valve spring pete 23 17:53:22 02/04/09 (0)
• Re: 560 Gas thermostatic valve spring Janicholson 17:37:22 02/04/09 (0)

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