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djoptix last won the day on August 31

djoptix had the most liked content!

About djoptix

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    Part time gynaecologist and full time Ainsley Harriott fan

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  1. I've always wanted a 1*2 but this thread is doing a good job of changing my mind. Give me a Renault 4 engine any day 🤣
  2. That car reminds me of something, if only I could work out what... Oh yes!
  3. This was the head when it came off: ...and this is how it sits now. I've taken off the old gasket, done a moderate amount of scraping with a Stanley blade and gone round all the chambers and valves with the Dremel. As you can see, the waterways are definitely gunged up, so I'm going to need to get busy with the pressure washer once I have some time for it. This makes me a little concerned that this was the state the engine was in before it stopped running, but hey ho - no point worrying about it now! This was the waterpump inlet when the pump came off - so
  4. Definitely aluminimum - magnet doesn't stick and, if I'm not careful, I can shave bits off it with the Stanley blade ?
  5. The head is alloy so I am terrified of fucking it up I already tried a poly abrasive disc on the surface of the head and immediately decided it would be a Very Bad Idea.
  6. I don't know yet. I haven't got as far as compressing the springs to take a look (I haven't got a proper valve spring compressor but I think I can improvise with a G clamp). Just cleaning all the corrosion off that one chamber has killed the brass wire brush on my dremel, so I've ordered a multipack before attempting any more and also a window scraper (which takes Stanley blades) to scrape off the old HG.
  7. More hot Dremel action, cleaning up the head. Surely this can't be the optimum shape for the head chamber. The valves are shrouded way back in the head, and look at all that protruding metal. The bottom edge would be like a shelf in the combustion chamber. If I shaped the chambers (grind back to where it meets the top of the liner) could I get a genuine performance upgrade? Maybe take it past the 30bhp barrier?! Maybe not. It's always going to be a low powered engine built for longevity and not speed...
  8. Probably. Sorry The thing is, we expect @bramz7 or @NorthernMonkey etc to be constantly buying and selling cars. Yours are much more interesting because we get the full detail of you agonising over it beforehand, then blow-by-blow of buying and collecting, many many posts about how good it is, then two days of silence, and then it's for sale. I'm mainly thinking of that 306 convertible... Don't go changing though we love you juuuust the waaaaay you aaaaaare...
  9. I did start with engine oil. The result seems better with wd40 but I agree with you about wd40 not being any good for this sort of thing and so I can't really understand why it should be. I'll try engine oil and slower speed on piston #1 as a comparison.
  10. Thanks @Mr Pastry, those were exactly my thoughts. Not much of an update but switching to 550rpm and using wd40 as lubricant has given an improved result. I think 2100rpm was throwing the hones against the wall too hard. It still looks worse than it feels to the touch, and it's much less smooth than #3 (the cylinder that was mostly un-corroded) - but it's better than #4, the surface roughness has gone, and hopefully the new rings will be happy.
  11. When you put it like that, you're right. 2100rpm is way too fast!
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