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Discussion Forum
:

Mystery solved...I think

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Mark F

01-05-2003 14:30:17




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I finally pulled the engine out of my G. When I go the head off I found that the 2 most interior valves were stuck. I think these are intakes, but not sure. Everything appears in good order but I have not pulled the pan. I think the rest is a job for a machine shop...Can valves still be gotten? Thanks for all the helpful post...Ps..Plant Doctor: It appears I'm on the downhill pull..Mark




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Jack

01-06-2003 19:30:40




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 Re: Mystery solved...I think in reply to Mark F, 01-05-2003 14:30:17  
Whatever you do the valves have to come out. Chances are they will clean up and be OK. I sure wouldn't go looking for new valves just yet. Your old ones can probably be ground in. Jack



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TimC

01-06-2003 13:24:06




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 Re: Mystery solved...I think in reply to Mark F, 01-05-2003 14:30:17  
Valves are like nuts and bolts, just have a machinist order by length, shaft size and head size if you have to. It might also be cheaper than buying factory replacements.



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Plant Doctor

01-06-2003 04:37:43




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 Re: Mystery solved...I think in reply to Mark F, 01-05-2003 14:30:17  
I have been following Mark's problem as much as possible and trying to help. I thought about the possibility of a stuck when he said he could get one and a half turns before it would turn no farther. But the valves in the "G" are very small and when turning the engine over by hand and the fact that you double your leverage because the cam turns one half the crank speed, I discounted that idea and thought maybe the problem was in the timing gears or governor. I am still having problems getting this in my head. Unless those valves sat in a puddle of water I can not see them being tight enough to stop you from turning the engine especially if the engine has some hours on it which most of then do. Most of the ones I have worked on are just the opposite, to loose. But with this said, I think if those valves are that tight I would do as Mark is doing and overhaul it while I had it out. My .02 cents

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Tom

01-05-2003 17:22:17




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 Re: Mystery solved...I think in reply to Mark F, 01-05-2003 14:30:17  
Is there some reason you don't just free up the two stuck valves? And try it? Carefully tapping them back and forth with a soft hammer adding WD-40 as you do it may free them up. When theyare free add oil while working them back and forth too.



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Jack

01-05-2003 19:18:33




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 Re: Re: Mystery solved...I think in reply to Tom, 01-05-2003 17:22:17  
I agree with Tom-try to free the valves up and you should be OK. Almost always when you can turn a crank a certain amount of degrees each way and then come up blocked you will find a stuck valve. Think someone pointed this out in a previous post. Could have saved the labor of pulling the engine. However since you have it out and easy to work on I personally would go ahead and hand lap the valves in. Jack

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Mark F

01-05-2003 19:10:54




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 Re: Re: Mystery solved...I think in reply to Tom, 01-05-2003 17:22:17  
I did try to free up the 2 valves, but I thought I might do harm if I continued. I also tried WD 40..No luck. Since the engine is out and the head is off I decided on a rebuild. That is if I can free the valves, hopefully new valves are still available. Mark



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Mark F

01-05-2003 19:10:22




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 Re: Re: Mystery solved...I think in reply to Tom, 01-05-2003 17:22:17  
I did try to free up the 2 valves, but I thought I might do harm if I continued. I also tried WD 40..No luck. Since the engine is out and the head is off I decided on a rebuild. That is if I can free the valves, hopefully new valves are still available. Mark



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Irv Slagter

01-06-2003 17:07:27




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 Re: Re: Re: Mystery solved...I think in reply to Mark F, 01-05-2003 19:10:22  
Try something beside WD-40. It's been discussed in most forums about pentetrants, and theres some really good ones that will work a lot better than WD-40. Lawson makes a really good one. My 2c worth
Irv



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