Plugs away!!
I agree that seeing them in this condition was quite, eh...um... unexpected. While horribly eroded, they're not black, or wet or covered in deposits. It's amazing it ran as well as it did. He ran around a bit yesterday and put nearly 40 miles on it with no issues. He's headed out to his gf's this weekend. That's a 150mile roundtrip. I'll likely pull the plugs and redo the comp test when he gets back.
Saudade is a competent DIY and general auto service mechanic so I am sure he knows things to look for .From the pictures the. Boots boot springs and spark plugs were all just well worm out. If he had an oscilloscope prior to do the ignition service could have verified this and if there was a weak cylinder. But IMHO it was all the parts perhaps even the coils that are in need of replacement and any ignition problems.
Naturally I am going by the few pictures but the thousands of spark plugs I have changed over time
Naturally I am going by the few pictures but the thousands of spark plugs I have changed over time

But to your point, I am a DIY'er. While I have some decent hand tools (metric, imperial, and even a few Whitworth) and some "specialized" auto tools (brakes, AC) I am still limited in what I can do. The tools I have, I have amassed over many years and in many cases, bought when a particular job called for it. Even so, as cars get more sophisticated and computerized, so too does the diagnostic equipment. I can diagnose just about any issue on my 1988 Jeep Cherokee with just a multimeter and repair just about anything with basic hand tools (OK maybe not quite anything). My point here is that, at some point, the issue will exceed my ability to correct it or just cost far more than it's worth. At that time, we'll have to decide to send it to a Pro, or give it up. This has happened with a few prior vehicles.
Yeah, both of my sons do not share the same penchant for things mechanical as I do. They do help out when I work on their cars and I'm getting them to the point where they do the routine stuff it and I help. The end game is to simply get them to do it without me.
I reached my ability when they took out the engine and put in a motor (electric). At that point I decided to give up. However they are a bonus for dealer service dept's. Whitworth tools? OMG the only things I have that use them is 2 British Motor Cycles that live statically in the garage. How many miles has this car done?
I have a complete set of Whitworth tools needed them or more wanted them back when I was into British cars manufacture from 1959 - to December of 1979 British cars..
Last edited by Callisto; May 16, 2026 at 08:03 PM.
I have a big set of BSF taps and dies that I have never used. Work had a cleanup and threw them out. One day I will need them. It's the main thread type on the Matchless. Don't know about the Bantam BSA. Did a job on a Mitsubishi and needed a 10mm tap at the time. Customer proudly puffed his chest out stating he had a large tap collection.Whitworth says it all.
The few I have are from when I worked a summer as a mechanic at a Norton, Ducati, Motoguzzi dealership back in the 70's (in College). We also got lot's of Triumphs, BSAs, even a few Vincents and an Ariel. Don't have much, just a few for those "in between" sizes where neither SAE nor Metric fit just right.
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Jul 22, 2018 01:41 AM



