26-07-2018, 06:50 AM
(26-07-2018, 06:06 AM)Ian Williams Wrote: Simon provided lash is not significant do not worry about a little bit of noise as the cam flicks over on the valve springs, this is perfectly normal. It is important however that you check the cam timing, particularly as the face of your gears do not appear to be in line with each other, that in itself is unimportant but the timing is, Paul should have given you figures, adhere to them. The peg hole in the crank case and cam bush are often damaged and are also not a great design as standard, we have talked in the past about improving this, in doing so you should make sure the bush is located fore and aft correctly as this affects your cam timing. I usually plug and re drill both the oil way and location hole so I can dial things in and ensure correct opening/closing, if really enthusiastic and wanting to experiment further you can make a vernier cam wheel from two old gears.
Thanks Ian, cam bush has been sorted out as you have suggested. I have a stud in there and when done up it's all nice and tight. I do need to adjust the cam timing as you say. I aligned them as per the dots on the gears but that doesn't match what Paul told me to set it to so I need to change that. It looks about a tooth off I think. The gears are actually in line, I made sure of that when I was setting up the end float (and I just checked with straight edge across the faces again to make sure).
It did occur to me the noise I hear sounds far worse in a quiet garage with no other noise about. In a running engine would it even be noticeable?
Don't try and get me onto more complicated things with vernier cams! Am having enough trouble getting the basics sorted at the moment
Even the basics are tricky. Steve gave me a good nose cone to use that will be correct for my engine and radiator (I was going to cut down a Ruby one) but I just discovered the diameter of the starting handle bosses is different so the one I have won't fit. There are a ton of little details on cars like this with such long production runs and changes that can trip us new players up.
Simon