Scrap

One Man's Junk is Another Man's Treasure.

Last weekend I managed to come by a box of parts that I hope can be used for the engine rebuild.

The camshaft and lifters are not in mint condition bout should be usable. At least in a much better condition than the ones I've got.

Small step

Made some progress with the valves. Unfortunately I have a house and a garden and it's spring time and ...

Anyway, managed to mill the holes in the valve stems and cut them to the appropriate lengt. Since I do not have any valve grinding machine I will have to make a jig to grind the end of the valve stems. Hopefully this weekend (as long as the weather is rainy I can't do any outdoor painting).

End mills

Finally got the end mills I ordered all the way from China. Sold as Solid Carbide HRC60 and as such they should have no problem milling stainless steel stems, or...

Valves

According to an old James Catalogue, the valve dimensions are as follows.

According to my measurements the valves are somewhat longer.

Anyway I'm not patient enough to wait and see if any JAP valves will pup up so I scanned through some valve makers catalogues and found out that Manley GEN II exhaust valves are pretty close.

Found a set of eight valves for sale on eBay. These were custom made and the valve head was close enough to fit without modifications.

Valve head = 1.6" & Valve stem 7mm

Of course they will have to be shortened and modified with slotted stem ends.

The main concern is if they are too heavy compared to the original ones.

In case they can't be used I'll buy some used NASCAR titanium valves and try to modify them instead ...

Fault 02 & 01

If I thought yesterdays find was a major fault, then todays find was humongous.

Both valves are crap. The one I managed to get loose, in the picture. The stem is completely worn out, the same of cause, goes for the valve guides.

The missing piece from the cam follower appeared today. Probably broken off when the valve seized or when someone tried to turn the crankshaft and the valve was stuck.

If anyone have an extra cam follower ( Parts no 6170/F ) feel free to contact me.


The one positive thing that I found out today was that the piston seems OK. No scratches and all three piston rings are loose.

The marks below the rings are caused by oil.