help with modern valve guides

K

ksousa

Junior Member
I hate to be so naive, but I'm naive.

Stock '29 RPU with original drive line. We had one stuck valve and one that was broken.
I bought a new modern valve set from Mike's Affordable or Snyders (can't remember which one).

The one piece valve guides have a little step on one end where the OD is a little bit smaller than the rest of the OD.

1) Does the end with the smaller step go towards the top or the bottom?
2) Do I install these from the bottom and push them up, or from the top and push them down?
3) And how do I know when they're all the way "in"?

thanks in advance.
 
1) Does the end with the smaller step go towards the top or the bottom? BOTTOM

2) Do I install these from the bottom and push them up, or from the top and push them down? Top and push them down. You should have a special mandrel so you do not mushroom the top. When installed you may need to ream the guide.

3) And how do I know when they're all the way "in"? The top of the guide should be flush with the block.
 
Frank has it right, exactly! They should be a press (hammer) fit. If not, knurl the guide, loc-tite will not always hold them in place.
 
frank55a said:
1) Does the end with the smaller step go towards the top or the bottom? BOTTOM

2) Do I install these from the bottom and push them up, or from the top and push them down? Top and push them down. You should have a special mandrel so you do not mushroom the top. When installed you may need to ream the guide.

3) And how do I know when they're all the way "in"? The top of the guide should be flush with the block.
Click to expand...
Reviving an old thread - this is the exact problem I've been trying to find (lord, google is your friend *and* enemy!)


SO from the head side, drive them in, small ID first, until the top (larger OD) end is flush with the bottom of the valve cavity?
 
Use a driver to press or hammer them in. A driver is merely a punch with a long stem that fits inside the guide, is square on the face that does the driving. I leave them slightly above the bottom of the port, as stock guides do.
 
The OP has the modern valve kit, Snyders A 6505 M, which have the one piece guides, they push in from the bottom and the spring holds them in place, if you use the hammer in guides then you would need a spacer added to keep the valve spring at the correct length.
 

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