Take the Porsche M96 engine in my new porsche carrera. It has six spark plug tubes (later the design was thankfully changed to not have this feature!).
These tubes are sealed and held in place by a captured o-ring on each end. You can buy many combinations of the tube and o-rings from various sources. As somebody with an engineering background I saw the asking price for these o-rings and immediately recognized that the Porsche brand was again inflating prices.
Large spark plug tube Oring
When the parts catalog is examined it gives the following spec: 27.94x5.33
a quick consultation with a google search results in AS568 as a specification for o-ring sizes, and -320 as the size meeting those dimensions.
Now to amazon to discover that rather than pay $7 for one oring i can, in fact, get 10 o-rings for less than $7!
Or further goggling and you can discover that over at oringwarehouse.com, where they have a $5 minimum I have to buy 25 of these beauties!
incredible.
Small o-ring
parts catalog spec: 25.07 X 2.62this spec = AS568-120Similar to the above o-ring, this one costs about 10 cents. even in soft high temp silicon.:)
1 comment:
This is great information, anybody looking for these items in UK or Europe can search for BS320 and BS120. these are the British standard for these o-rings, i had to order a total of 40 o rings but still only £14, anybody need a set contact me, chrsan@telenet.be,
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