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Oil pressure issue / motor rebuild
MrDavo:
A brief update, I decided I needed to know if I needed another bottom end before I went to Stafford tomorrow morning.
I donned my mask, safety specs ( soon gave up with these as they kept misting up, and I was hardly sloshing the paint stripper around), and on the advice of Ed I wore double gloves. Once I'd scraped the bulk of the paint off I could almost wipe it off with the Loctite gasket remover, I noticed when I was scraping away the base gasket that it was shifting the silver paint, I don't know what's in it.
I got the paint out of all the main journals, and all the gearbox bearing housings while I was at it.
Ed has flown off to Korea, his job's like that, so I couldn't borrow the bore gauge again. However when I spoke to him last night, he suggested I just put the crank & shells back in, lube everything & torque it up, if our theory was correct it would work, if not the cases are scrap.
I was nervous as I tightened the bolts, having been here before, but I kept checking as I tightened each bolt. I finally got the last one up to 18ft lbs, and guess what? It still turns!!!
Jobs a good 'un, as we say up here, and I know the rods shells are right, so hopefully no more dramas, though I'm not in a tearing hurry.
Who would have thought that an uneccesary layer of paint could wreck a fresh engine? I reckon they realized there was a problem too late, and made it turn over.
AshimotoK0:
Nice result in the end Dave .. are you Plastigaging again or just 'going with it' ?
Don't think you would have found any K1 cases at Stafford. I did see the same bottom end I saw a week or so back at Newark but it's a very late engine with weird numbering
MrDavo:
I decided today not to bother with Stafford show, seen most of it before and nothing I need to buy right now, and spent the day in the garage instead :)
I did a plastiguage check, 1.5 thou imperial, within spec.
I built the bottom end upside down, into the top case, it was much easier to align the gearbox bearings with the half rings etc, got the crank in the chains, rods on and the cases together, checked I had 5 gears too. Then after I torqued the crank bolts up for the hundredth time I checked Hondaman's book for the torque setting for the small bolts. Only then did I notice his warning that it's easy to put the large final drive gear on the layshaft the wrong way round, which wears it and the gear next door out. Earlier it had been rolling across the garage floor, and I realized the was a 50/50 chance of this :(
I decided to split the cases again before the sealant went off. I'm still not sure which way round the gear is, but I'd rather redo it than get it wrong. Hopefully the drawing in the parts book may help, but I'm done for today.
MrDavo:
Another update, this is where I'd got to on Monday evening.
There will now be a delay while I scrape off the remains of the base gasket from the barrels, as it was very well stuck on, which is why I couldn't get the barrels off. I'm about to nip to B&Q to buy a couple of large hose clamps to use as ring compressors - you polish the burrs off the inside, as per Hondaman's book. Edit - got ones that were smooth inside, no serrations, £2.54 the pair!
I'm minded to fit the plug to the end of the oil gallery, and fill it through the oil pressure light switch hole, so the mains have some oil. Whether it will slowly drip out, I'm not sure. I'll pick up the oil pump body later, they've got the central seal out and pressed the new one in.
Trigger:
The centre seal will come out easy with a bit of heat ;)
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