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4LW tappet sound


jenevers

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Using a long screwdriver, as a stethoscope, to listen to the tappets through the rocker covers on my 4LW (like the submarine engineer in "Das Boot"),I get noticeably different sounds. Cylinders 1 & 2 sound quite "breathy" whereas 3 & 4 sound more "clicky". I haven't checked the clearances for a year but just wondered if other LW owners get similar differences.

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Sounds like you just need to adjust them yes you can hear the difference.  The middle cylinder of my 3LW needed a small amount of adjustment the end of last year and is much smooother now after I check and adjusted the tappets.

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On 02/04/2017 at 18:35, PeterG said:

Sounds like you just need to adjust them yes you can hear the difference.  The middle cylinder of my 3LW needed a small amount of adjustment the end of last year and is much smooother now after I check and adjusted the tappets.

Well I've adjusted the tappets and they still sound like they did before.

so....... has anyone else noticed a difference in sound between cylinders?

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39 minutes ago, Sir Nibble said:

Most of what you hear is reverberating around the castings. You might have the same sound with different acoustics.

Hmm. Wouldn't have thought so cos using a screwdriver as a stethoscope, means I'm listening to a very localized spot.

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1 hour ago, jenevers said:

Hmm. Wouldn't have thought so cos using a screwdriver as a stethoscope, means I'm listening to a very localized spot.

Precisely. With all the airspace around a 2 cylinder head and then the pushrod tunnel before reaching a common crankcase with chain and breather at one end the design builds in difference.

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48 minutes ago, Sir Nibble said:

Precisely. With all the airspace around a 2 cylinder head and then the pushrod tunnel before reaching a common crankcase with chain and breather at one end the design builds in difference.

Good point.

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I used to worry about odd noises from my Gard. In the end came to same conclusion. I'd like to know a bit more about what the stop lever does however. IF you stop engine by shoving it backwards but/ and before engine fully stops you push lever forward again does this affect anything?

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