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Thinking about it again, that seems awfully large. I think that dimension is for the bores in the head where the guides sit. Reaming the guide should just get you your proper stem to guide clearance. IIRC the ream you need is based on the valve stem diameter.
Thats what i was looking in to, through Goodson. I am just not sure as to what i all need to accomplish it myself. I see they have 6mm guide reamers, but what do i all need to do it.
do you happen to know then, or at least where to find, where the inside diameter specs would be???? Just measure the valve stems and go off of that you're saying???
Basically you make them the same size as the valve stem. I cant remember exactly what a general spec for clearance would be. If i had to guess .001-.003" of clearance. To ream the guides i just use the reamer, some kind of pilot that makes the reamer rod fit into an air hammer, and an air hammer.
Basically you make them the same size as the valve stem. I cant remember exactly what a general spec for clearance would be. If i had to guess .001-.003" of clearance. To ream the guides i just use the reamer, some kind of pilot that makes the reamer rod fit into an air hammer, and an air hammer.
What about an electric drill, same results? Preferably would like to go air, but dont have that option at the moment.
And last thing, if i ream the guides, is it necessary to hone??
I'm sure Slowbalt2000 meant drill for reamer, air hammer to remove and install the guides. Your local machine shops must be really bad to want to do this yourself with no prior experience or equipment. I did hundreds of seats and guides in 10 years as a Chevrolet, Cadillac tech when we rebuilt 95% of all small blocks over a crate motor and used a tool exactly like this which basically reduces the speed / increases the torque. Still, a pretty powerful electric angle drill was used. Today the equipment is light years better and mostly CNC in large production machine shops.
The other items are the stands, 3 knurlers and a bunch of reamers.
My memory must be failing me. I was installing bronze guide liners in BBC heads and i couldve sworn the process of ramming a slightly larger rod through the guide with an air hammer to expand the liner was called reaming. Im guessing i probably drilled or "reamed" them first but im not sure what the process im thinking of was called. Carry on
I'm sure Slowbalt2000 meant drill for reamer, air hammer to remove and install the guides. Your local machine shops must be really bad to want to do this yourself with no prior experience or equipment. I did hundreds of seats and guides in 10 years as a Chevrolet, Cadillac tech when we rebuilt 95% of all small blocks over a crate motor and used a tool exactly like this which basically reduces the speed / increases the torque. Still, a pretty powerful electric angle drill was used. Today the equipment is light years better and mostly CNC in large production machine shops.
The other items are the stands, 3 knurlers and a bunch of reamers.
Yeah just a lot of shady folks in the area!
I was thinking of using a drill guide to keep it centered straight and true. And that tool you circled would be nice, however, i will be using an impact gun with variable speed control.. i feel that with this and the guide, i should be alright.
05-15-2017, 01:08 PM
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