Ported 3B Head Rebuild Photos.

[K Simmonds]

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As I'm sat at home ill and a little bored here's a load of pictures, which I know you all like, of a 3B head. Full strip and rebuild in an attempt at being in order but they may not be 100%. I can a will do a full write up of what's involved this evening as I'm doing this on my phone which is best irritating. Will also as give some tips on how I go about this job. Though if you have any questions or your own tips do fire away...


The head came off my Nothelle conversion done by Brian Rickets in 1993, that's 30 years ago so new stem seals were in order as well as a good clean, decoke and valve relap. I got all the vavles so the combustion chambers all held meths for an hour or so while I had a well earned cup of tea.

However, I was pushed for time and the job was more important than photos. And after getting 40 collets back in place using a couple of picks and grease I really needed a quick break! One can't use a magnet for getting the little ******s back in unlike removing them as it sticks to every other steel component. It quite a fiddly task!

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[K Simmonds]

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There's quite a few more but can only upload five at a time as a rule. Anyway, here's the next batch...

I had to do a quick repair to valve spring compressors as a mate had somehow managed to snap one of the arms as well as bend it. This is why I do not lend my tools to anyone, this really was the the last straw!

It wasted an hour of my time straightening it out, griding off rivets, welding up the damage and it making look at least reasonably well repaired with a more grinding and find some suitable M6 nuts and bolts.

[K Simmonds]

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There's quite a few more but can only upload five at a time as a rule. Anyway, here's the next batch...

I had to do a quick repair to valve spring compressors as a mate had somehow managed to snap one of the arms as well as bend it. This is why I do not lend my tools to anyone, this really was the the last straw!

It wasted an hour of my time straightening it out, griding off rivets, welding up the damage and it making look at least reasonably well repaired with a more grinding and find some suitable M6 nuts and bolts.

Tapatalk does not make this easy at all for laptop users! I'm having to do this using my phone as well as a laptop and I'm still making a mess of it. Here's some more before I have a cuppa.

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[K Simmonds]

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More...

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[K Simmonds]

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And back together again after two long days. As I've got space here's a random pic of some retro Black and Decker garden tools that I've been slowly servicing and cleaning whilst ill. The hedge trimmer is done, about to start on the chainsaw. It's 1500W and for tackling thicker bushes, saves getting my petrol one going. They're both of 1983 vintage, back when Britan still made such things, I tell you what they're better constructed than a modern Bosch or even a Makita. Bloody China...

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[Tractor Dave]

Looking good Kit. Nice porting on the head. What make/model is your valve spring compressor? I need a new one.

[K Simmonds]

The port work was all done by Brian Rickets and is excellent, it must have taken him ages in 1993 with the tools available then, it would still be a big job today! It took me two full days to strip it down, clean and decoke it, touch up the knife edges on a couple of the exhuast ports with sand paper, change the stem seals which was a bitch of a job. I have the correct tool for removing then but they took some shifting the little sods. Installing the new ones took no time at all, I push them on with care using either an 8mm or 9mm socket.

To be honest I can't recall the make and model of my spring compressor, I went on eBay and got the best one I could find for a reasonable amount of money (under £50 delivered), the manufacter Laser has just popped into my head am 90% sure that's the make at least. It's not super easy to use, they never are, but is better than most the modern ones I've had to stuggle with... My one does at least have leavers at both ends and can access deeply recessed valves. I wanted to purchase an old British tool but could't find anything at the time I needed it, might have a look on eBay now as I'm sat in the warm.

[K Simmonds]

Have just found the exact model I have, it's cheaper now, check out eBay No 143824942225

It's a pretty good tool, though I'd still like a vintage one, I always try and buy old British tools as I don't like supporting China.

How my mate broke it it beyond me, sometimes the collets and upper spring plates seize in place but a sharp tap with a little hammer whilst under a bit of pressure will alway free them off. I use a gun smiths brass hammer when working on delicate parts.

[LHD_Kid]

Nice... you have the big oiling hole tappets there too...

looks like a good job