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Re: [T3] Oil Pressure Relief Valve Spring Length


On 16 Oct 2001, at 11:38, shackedup wrote:

> OK the car is a 63 single carb with early (.008" valve setting) heads
> and god knows what for a case.  I do have enough oil in the car so I
> removed the oil pressure relief valve to clean it up.  I have read
> that the unladen length of the spring in there should be between 62
> and 64 mm but when I measured it it was 73mm!!  The piston I removed
> was the old pre-s type.  I cleaned up the spring, piston, nut and the
> hole they came from and reassembled using a 62mm spring from my other
> single carb engine.
> 
> Now the light comes on more often!

The parts list shows that the same spring was used up thru 69. 
The Bentley says that spring should require 5-9 lbs to compress it 
to 43mm length. It's hard to actually do this, but it's really the only 
way to be sure. I didn't find a free length listed.

Over the years there have been a lot of "HD" springs marketed out 
there which pretended to fix problems, both real and perceived. I 
have not seen them do anything, but I have some. It really IS hard 
to pick out the right springs.

-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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