Measuring Engine Parts | Triumph Spitfire Restoration - Part 97 

I think you're doing fine, Steve. Like I said the other day, 2024 HF is at least as good as 197X Triumph. Looks like you've got a good motor there.

First!! When checking for flatness go front to back like you did but also side to side on both the block and head. As for the valve seats I would have them all done and a valve grind job. If you are going to put a new can in get new lifters and have the valve springs check. They do get soft over time. Glad to see that the measurements are good not just a honing needed. You may as well get new parts instead of reusing parts if possible. How did the rocker shaft work out? Cheers!

i've neve seen the feeler gauge measurement with the piston in the bore. interesting. if the cylinder is worn too much you can possibly get piston slap when cold. i think with all new rings you should be good to go. gap the rings to the tightest book measurement and bobs your uncle.

I don’t recommend a new camshaft keeper. The one I bought is too thick to go in the slot on the cam shaft… So I reused my old one which is in roughly the same shape as yours. As with everything I don’t expect there’s multiple manufacturers so chances are they’re all rubbish.

Use the right measuring tools. Try calibrating those crappy calipers with quality gauge blocks. It will surprise you how bad they are...

That's no way to check a bore, 0.010 is meaningless unless you're looking for something grossly worn out. Piston's thrust surfaces are what contact the bore, not the ring lands that are undercut for carbon clearance. The piston is oval shaped, so measure/check at 90 degrees to the pin, half way between the pin and the bottom of the skirt. Use a feeler gauge on the skirt for piston fit, bottom of the bore for almost no wear, just below the top's ridge for where there will be the most wear, perpendicular/90 deg. from the crank center-line, top where it wears & bottom where it don't. Tap crank with a hammer, should ring like a BELL! If the crank end float wasn't too bad, why anything special for the new thrust washers, cause there's a lotta people out there that wanna sell stuff that you don't need & might even be bad for you & your engine.