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Valve Guides on G176


 
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sdj02
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Joined: 13 Apr 2018
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PostPosted: Mon Apr 16, 2018 10:31 am    Post subject: Valve Guides on G176 Reply to specific post Reply with quote

I am in the process of repairing my Massey 165 with the Continental G176. The valves are bad and the valve guides are loose. The machine shops around here are pretty
high. I was wondering if replacing the valve guides and lapping the valves is really that hard. Can anyone shed any light on the job before me? I have done lots of
engine work over the years, just have never messed with head repair. Any information is appreciated.
 
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Steve@Advance
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PostPosted: Mon Apr 16, 2018 3:15 pm    Post subject: Re: Valve Guides on G176 Reply to specific post Reply with quote

I would not try replacing guides and just lapping the seats.

They would need to be ground to get a proper seal.

You could try, put some blue on them, watch the pattern. Nothing to loose if you are comfortable replacing the guides.
 
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Mike(NEOhio)
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Location: Geauga County, Ohio

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PostPosted: Mon Apr 16, 2018 3:47 pm    Post subject: Re: Valve Guides on G176 Reply to specific post Reply with quote

Check the wear on the valves. They may be out of spec even with new guides.
 
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David G
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PostPosted: Mon Apr 16, 2018 4:35 pm    Post subject: Re: Valve Guides on G176 Reply to specific post Reply with quote

What is pretty high?

I do not think it is a job for the newbie.
 
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Den N Ms
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PostPosted: Mon Apr 16, 2018 6:33 pm    Post subject: Re: Valve Guides on G176 Reply to specific post Reply with quote

Sdj02,The job requires quite a few pieces of specialized tooling and tools to replace guides and grind the seats properly and replace valves.Let the pros do it as they have the tools.
 
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David G
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PostPosted: Tue Apr 17, 2018 7:28 am    Post subject: Re: Valve Guides on G176 Reply to specific post Reply with quote

My personal view is that valves should be ground, seats should be ground or cut, then lapped together if desired.

There is no way I would plan to replace guides, then just lap.
 
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gab
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PostPosted: Tue Apr 17, 2018 7:38 pm    Post subject: Re: Valve Guides on G176 Reply to specific post Reply with quote

Probably not hard at all if you own a seat grinder and know how to use it. Machine shop sounds pretty reasonable to me.
 
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MikeJM
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Location: New Jersey

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PostPosted: Wed Apr 18, 2018 3:53 am    Post subject: Re: Valve Guides on G176 Reply to specific post Reply with quote

How much is the shop going to charge you?
Your going to have about $250 in the valve train part, valves, guides, springs and keepers.
A good shop in my area will have 2 to 3 billible hours in a head like that providing there’s no other issues with it. (cracks)

Its a bit more complicated that throwing new parts in it, if the valves don’t seal then the engine won’t run well. I have our 165 apart with the same issue, guides and most likely valves are shot.
 
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sdj02
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PostPosted: Wed Apr 18, 2018 4:10 am    Post subject: Re: Valve Guides on G176 Reply to specific post Reply with quote

Thanks for all the info. My valve train kit is on the way. $150 for new valves, springs, retainers, and guides. I found another shop that will put the kit in for around $200. Much better than the $400 I was quoted by a different shop.
 
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