Paul arrived at my place yesterday about 4:30pm with my long lost MC18 SP engine from OkShon.
Paul was keen to start stripping the engine down straight away, but I had an unexpected visit from my Father and had to set up the BBQ as I had to do dinner for Paul and I, as well as Wob and Kathryn. Later Dave also joined us for a night of eating and drinking.
So, this morning I got up at 6:30am and went into the laundry (temporary shed) and started to pull the engine apart.
Paul joined me at about 7:15 and we soon had the engine pulled apart. Well, except for the flywheel as I stripped the thead on the flywheel puller trying to get it off. D'oh!
The barrels/heads and pistons looked to be in very good condition.
We took the engine into Wobs and pulled the flywheel off and split the crankcase halves and pulled out the crankshaft.
Then we pressed the crankshaft apart.
The crankshaft and conrods appear to be in excellent condition !! This is EXCELLENT news!
All that was wrong with the engine was the RH Main Bearing was worn out.
The Lower RH barrel had some very minor scoring in a few places around the cylinder but this is not really a problem.
Also, as the crankcase halves seperated, the centre main bearing seal broke apart. It had been crimped at the join of the crankcase halves on assembly.
There was a fair bit of black RTV silicon "goop" around the RH main bearing seal. Clearly the engine had previously been pulled apart. In fact it has probably been used as a race engine as the sump plug has been replaced by an Allen head cap screw and the dip stick "handle" had 2 holes drilled in it for lock wires, no doubt.
A curious point is that the Upper LH cylinder and crankcase seemed quite dry and poorly lubricated. I am unsure why this would be the case.
Wob has ordered a pair of big end bearings, and when they arrive he will press the crank back together with new bearings and seals, and align the crank.
In the meantime I will bead blast the crankcases and possibly polish up the insides of the crankcases a bit.
After 16.5 months and NZD$1100.00 I am actually pretty happy with my engine purchase from OkShon Japan. :-).
Finally a good NSR crank!! Hurrah ;-)
ReplyDeleteYour lucky, my items are still not sendt from Okshon. They do not respond to emails at all !
ReplyDeleteNice to see that you finally are doing engine work after 16.5 months, thumbs up.
No luck was required. A phone call from the Hong Kong CyberCrime division was all that was required to get OkShon very pro-active about shipping my engine.
ReplyDeleteHi what set up did u use to press apart the crank?
ReplyDelete