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You can do it to the upper guide or the bottom of the retainer or a bit from both.

The cautions are:

1. There needs to be enough guide to allow the seal to seat on the guide and not be hit by the bottom of the retainer.

2. The locks are a pinch fit in the retainer so any extension below that point is not carrying load. Although, it does contribute hoop strength around the hole so the lass material removed the better toward that end. The grind should be polished to remove stress risers that will contribute to crack failures. Retainers are heat treated steel doing any grinding should be done with cooling so as not to disturb the heat treatment. You for sure do not want to see a color change in the steel of these things. So there is a requirement to pay attention to these details and use a high standard of workmanship.

Bogie
 

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Discussion Starter · #3 ·
Thanks for the info. Im a blacksmith so I definitely know the problems that can arise with heat treatments. But I never thought about the guides. Probably because escort motors have a combination valve spring seat and guide seal. I could probably separate the two and sand down the guides too.
Would there be any problems with not having all the retainers exactly the same size? Would that toss anything off balance?
 

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Would there be any problems with not having all the retainers exactly the same size? Would that toss anything off balance?
Not of any real significance....extremely high rpm 9500-up might be effected by different weights(spring surge or valve float).....but then, anybody doing the grind on spring retainers isn't shooting to turn that kind of rpm anyway, so the point is moot....
 

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Discussion Starter · #5 · (Edited)
Not of any real significance....extremely high rpm 9500-up might be effected by different weights(spring surge or valve float).....but then, anybody doing the grind on spring retainers isn't shooting to turn that kind of rpm anyway, so the point is moot....
Thanks, thought id ask since 80s escort motors are very hard on the valvetrain and are very well know to have problems even on a stock setup with some miles on the valvetrain.
I plan to set the rev limiter at 5k so I should be good on the RPMs.
The only stock parts I have in the valvetrain are the retainers and lifters both of witch are very heavy duty, the rest as been replaces with stronger/lighter parts to help out with the know problems of the motors.
 
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