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Originally Posted by R32 Combat
Keith,
I know about weak guides, I broke a nissan one a few years ago. The sintered iron guides are not very good and are very brittle. This is why I made my silicon bronze guides up. Also, the guides only break where they are not supported by the head. I no longer have this problem.
I've run 10,000 miles like this with no problems. I know this might seem a little unorthodox, but its worked ok for me..
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I am more worried about the affect the short Guides will have on your valves seating properly, the shorter the guide the more side to side play the valve will have.
that extra bit of guide is there for that very reason it would be a shame to wreck your engine over a set of new guides.
Andy if you are happy that it is going to be ok then go for it.
Keith