Valve Guides on G176

sdj02

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