valve and guide clarification

Dick Eastman · Post by **Dick Eastman** » Tue Apr 12, 2016 5:40 am

Combustion chambers had pitting, so I re-cut to clean up. Still have to cut seats

LOUD MOUSE · Post by **LOUD MOUSE** » Tue Apr 12, 2016 5:48 am

Looking good. ......................lm

Dick Eastman wrote:Combustion chambers had pitting, so I re-cut to clean up. Still have to cut seats

Dick Eastman · Post by **Dick Eastman** » Tue Apr 12, 2016 6:10 am

drawing, too light, but drawn off SoftWorks program

Dick Eastman · Post by **Dick Eastman** » Tue Apr 12, 2016 6:12 am

LOUD MOUSE wrote:Looking good. ......................lm

Dick Eastman wrote:Combustion chambers had pitting, so I re-cut to clean up. Still have to cut seats

Thanks, Ed.
Still much work to do

LOUD MOUSE · Post by **LOUD MOUSE** » Tue Apr 12, 2016 6:22 am

What do cut the seats with?. ...............lm

Dick Eastman wrote:
LOUD MOUSE wrote:Looking good. ......................lm

Dick Eastman wrote:Combustion chambers had pitting, so I re-cut to clean up. Still have to cut seats

Thanks, Ed.
Still much work to do

Dick Eastman · Post by **Dick Eastman** » Tue Apr 12, 2016 7:24 am

I have Neway seat cutters/pilots for 30, 45, 60 degree. The valves are already ground, and new guides made. The guides were made from C954 hard bronze [the SAE62 hard bronze was too hard to find - new designation for SAE62 is C905]. The C954 is used for guides in aircraft engines.
I had to drop down .025" to get pitting out. I may have to add shims under valve spring seats, depending on how far the valves drop down with the re-cuts - won't know until I get guides/valves into head and measure stem tips to spring seats, comparing to a datum measurement of stock.
I load measured 24 springs to get the 8 best; some of the springs on hand were "tired"; I think this is very important, and something often over looked.

LOUD MOUSE · Post by **LOUD MOUSE** » Tue Apr 12, 2016 9:13 am

I wondered about taking up the slack after the cutting.
Aren't you happy you have the training.
I found the bomber.
Lots of other good airplane info there also. ............lm

Dick Eastman wrote:I have Neway seat cutters/pilots for 30, 45, 60 degree. The valves are already ground, and new guides made. The guides were made from C954 hard bronze [the SAE62 hard bronze was too hard to find - new designation for SAE62 is C905]. The C954 is used for guides in aircraft engines.
I had to drop down .025" to get pitting out. I may have to add shims under valve spring seats, depending on how far the valves drop down with the re-cuts - won't know until I get guides/valves into head and measure stem tips to spring seats, comparing to a datum measurement of stock.
I load measured 24 springs to get the 8 best; some of the springs on hand were "tired"; I think this is very important, and something often over looked.