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Murray
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Have a look at this hole !

Post by Murray »

for the sparkplugs on my 2.5 L :D
In my neverending quest to better understand the minds of Italian automotive engineers I just need to know - what purpose do the grooves in the spark plug tube serve ? I have two different types of cam covers,one has the grooves one doesn't ?
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1989-75 Twinspark very sadly sold-remarkable sedan !
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MR2 Zig
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Post by MR2 Zig »

They might be for locating the part in a jig during the manufacturing process, maybe :idea:
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MD
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Post by MD »

What about simply to let the trapped air out when pushing in/on the long insulation connector. :?:
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Murray
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Post by Murray »

Don't think that's it MD.The diameter of the plug insulator/resistor is quite a bit smaller than the tube plus there's a pressure relief hole in the rubber plug that fills the opening in the cam cover.
1986-GTV6
1989-75 Twinspark very sadly sold-remarkable sedan !
2014 Audi Q5 3.0l TDI - torque MONSTER
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