picken up an engine #3

[sayre315]

AGK even tells you how to file them
because when you buy them they send em in a little large so you have to file them to the rite length

 

[Kenny_McCormic]

Slams face on keyboard! SLAP ME, im an idiot!!
Now I see what your saying, I thought you meant file the OD.

 

[oscaryu1]

Slams face on keyboard! SLAP ME, im an idiot!!
Now I see what your saying, I thought you meant file the OD.

Haha, imagine how good that'd seal

 

[Russ2251]

Mr. Newrider nailed it exactly. I'll bet he reads a lot.
File is for ring end gap. I can't imagine anyone filing the circumference and still keep tolerances for entire area.
As soon as concentricity is compromised, rings lose there ability to seal.
Tolerance would be less than the diameter of a human hair.

 

[sayre315]

they say to file it side to side instead of forward and back bcause you may chip off the protective coating on the outside

 

[sayre315]

hey, could i get some help with this?
http://s276.photobucket.com/albums/kk10/sayre315_bucket/?action=view&current=sayrepic094.flv
and oscar, could you help me with this?
http://s276.photobucket.com/albums/kk10/sayre315_bucket/?action=view&current=sayrepic098.flv

 

[Kenny_McCormic]

The scrathced piston is not good, IDK if it should be replaced or not. The shroud should have 3 sets of numbers all in a row, year is the first 2 of the last set.

 

[sayre315]

ohhh the first two
hats why
i thought it was the last
oh the cylnder wall was scratched also but it still ran fine
good ol' briggs
is there some kinda luiquid i can put in the engine to kinda fill in the scratches?

 

[Kenny_McCormic]

No, hone it out for a overbore piston and rings.

 

[sayre315]

but its a cool bore

 

[Kenny_McCormic]

So?

 

[sayre315]

i thought you werent supposed to bore aliminum bores
and how would i do it?

 

[Kenny_McCormic]

I bored an aluminum leafblower, runs great, bore is a mirror. You can take it to a machine shop or buy the piston and bore with a honing tool till it fits.

 

[sayre315]

i think i'll just keep it how it is
thanks though
where can i get a valve lapping kit?

 

[oscaryu1]

Any local automotive store. There's the 2 types of paste (Coarse and fine), and the water soulable one (the more water you add, the "finer" it becomes).

And two sticks with suction cups on both ends. Clean off ALL of it, as lapping compound will eat your engine alive...

A few scratches is all right. However, if theres a million or so and you can feel them all with a fingernail, you got problems. As long as your rings are the rightside up, you should be fine though.

It's the first 2 digits of the last set of numbers.

You can bor

 

[newrider3]

You can go to .010 over easily, usually with just a GOOD precise hone. It isn't really very much larger than standard.

 

[Kenny_McCormic]

You cant leave the bore scored and such, it has to be honed out so the rings have something to break in on.

 

[newrider3]

You cant leave the bore scored and such, it has to be honed out so the rings have something to break in on.

12345

 

[Kenny_McCormic]

12345

dot is the term your looking for.

 

[sayre315]

well i have some large scratches in my bore

how would i get that honed and how much would it cost?