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CB400/4 ENGINE STRIP, ASSESSMENT AND REBUILD BY JULIE - NOW COMPLETE
kevski:
I use some super sticky double sided tape that we used for sticking grinding stones to their face plates when i was a plating tech, you have to use a good solvent to remove it though.
Nurse Julie:
--- Quote from: Oddjob on December 20, 2017, 09:55:41 PM ---Chuck type tap wrench, attach to the other end of the valve and pull the valve against the seat rather than push it against. Works much better as you can really get a good pressure on there so speeds the job up.
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It took me so long Ken I was tempted to stick the plunger on the end of my Frappe whisk and have a go with that ;D ;D ;D
Bryanj:
You used to be able to buy a tool that one end went in a drill chuck whilst the other had a rod with sucker and the box in the middle converted rotating motion to back and forth
Nurse Julie:
--- Quote from: Bryanj on December 21, 2017, 09:36:50 AM ---You used to be able to buy a tool that one end went in a drill chuck whilst the other had a rod with sucker and the box in the middle converted rotating motion to back and forth
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Like this you mean Bryan
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Trigger said why didn't I use this...... after I had spent hours lapping them in by hand >:( >:( >:(. It was in another tool chest that I had never looked in. Fits in a pillar drill and the head sits in a stand that holds it horizontal but with the valve vertical. So, just pull the pillar drill down with this attached to it at low speed. Oh well, I will remember it for next time.
Nurse Julie:
Continued working on the head today after yesterdays lapping in. In theory and also in practice to most of you, getting the valves in is no problem I'm sure and even I was thinking here is a nice little job to do. But, gosh, did I struggle big time.
The theory..... 1) Put outer seat over valve stem. 2) Put inner seat over valve stem. 3) Fit valve stem oil seals on the inlet valves. 4) Put smaller spring over valve stem. 5) Put larger spring over the smaller spring. 6) Place retainer on top. 7) Insert cotter valves. 8) Compress all together with the valve spring compressor.
(I have no idea where the smiley chap with the shades came from, it's supposed to be a number 8.......can't delete or change it either ;D ;D ;D)
Well, No's 1 to 7 no problems at all. The big problem came when I was trying to use the valve spring compressor. Firstly, my hands are really very small and as you would expect, not as strong as a mans. I was struggling that much the compressor kept moving around when I was trying to compress the spring and the cotter valves kept dislodging and falling out, even though I had put grease on them to hold them in place. In the end I only managed one complete valve and that took ages and an awful lot of swearing. I had to ask Trig to do the rest for me. Utter failure on my part, most disappointed in myself.
This pic shows the valve stem oil seal in situ on the inlet valves before putting all the other bits on
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And here it is all finished. I managed the one right end of the bottom row !!!
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