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| | | | Joined: May 2007 Posts: 41 Wrench Fetcher | | Wrench Fetcher Joined: May 2007 Posts: 41 | Hello All,
I have recently rebuilt a 62 261 Chevy. I am planning on using the head off of my 62 235 Chevy.
I know that I need to drill the steam holes as I have read about it the forums before. I am planning on using the head gasket as a stencil for where to drill the steam holes.
My question is do I need to be especially careful to not drill into an oil vein? How deep do I drill the holes. i was looking t the head and I think that I am supposed to drill vertically until I reach the water chamber. Am I correct?
I am planning on having new seats installed and guides as well.
Is there anything else that I should look out for, apart from magnaflux etc.?
Much Appreciated,
Eli | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Eli,
Drill the new water passages vertical to the head until you reach the other side. There are no oil passages to worry about where you will be drilling.
With the shop be grinding the valves? (Do they know the angles?)
Will you be using new valve springs?
Will you be using original valve seals or the umbrella-style valve seals?
Tim | | | | | Joined: May 2007 Posts: 41 Wrench Fetcher | | Wrench Fetcher Joined: May 2007 Posts: 41 | Thanks tclederman,
I was pretty sure about the steam holes, but I definitely wanted to confirm before I did anything.
Yes the shop will be doing the valve grinding. I will be using new springs. However, I haven't decided which type of seals to use.
Which do you recommend?
Thanks Again,
Eli | | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | If you can swing the extra machine work, the modern positive style valve seals are the best, but you have to machine the tops of the guides to make them fit.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | 4ontheFloor, Is there a particular size of positive-style valve stem seal that is appropriate for a 235/261 valve? Thanks, Tim | | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | I think the ones for a Chevy 350 fit the valve.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | |
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