okay I'm just starting my first rebuild and I cleaned the last of my parts today and I am just getting ready to assemble my rotors and I find this out.



my camera sucks but if you cant see it there is a hole in the back of the corner seal area that goes into the apex seal groove. its about the size of that paper clip. There is still metal 2-3mm or so so its not completely broken though into the corner seal area.

will this affect compression? should I just trash it? Its just an NA streetport mini build.


****!

 

Better pics would go a long way here...

 

Better pictures please.

 

buy me a better camera.

(i'm working on it)

 

that hole goes right into the apex seal groove.

its such a small hole...

I kinda want to jb weld it but I doubt it will hold with the heat of combustion....

 

Back the camera off a little, the floor is in focus. I don't think there's suppose to be a hole there though... might be junk.

 

^^ Is right... Back WAY off from where you are, then take the picture, then crop it so only the appropriate area is shown.

 

Turn on the Macro function, it's sometimes a picture of a flower. It helps focus for close up shots.

Backing the camera up is not going to help, because then it will be too small to see.

 

u guys dont get it, this camera sucks and no there isnt suposed to be a hole there but it is. the flash just reflects off the shinny metal and makes it unable to view anything. those were taken with the macro function on

 

Ummm... I can clearly make out details on the gray floor tiles.... You're too close.

st1llet0 - I recommended backing up because using Macro normally takes people quite a bit of playing to get right... Most reasonably modern cameras have so much "overhead" that there's plenty left to crop.

 

better? the camera still sucks but you cant see where the hole goes through, its like a 45 degree angle into the apex seal groove which is about 2mm big. none of these go into the rotor itself.













and I'm this far:

 

I don't have that hole.
Does your other rotor?

 

no, just that one groove on that one corner seal/ apex seal groove on that one rotor.

other rotor is perfect.

i;ve disassembled about a dozen 13bs an I've never seen a hole like this. These rotors came out of a streetported S5 that was supposedly good, so I bought for 50 bucks because it was carboned and made about 5psi, the aluminum housings has cracks on the lower spark plugs and there were no corner seal inserts in any of them whatsoever.

I didn't notice it till this morning when I finished cleaning the rotors because it looked flat at initial cleaning but there was carbon filling the hole. everything about the rotor is still fine.

 

Interesting... is there a crack in there? If not, I'd say you'll be ok if you use solid corner seals, which I don't think are very expensive. I would have reservations about using the original type with the rubberized inserts because of that divot.

 

OHHHHHHHHH, I suspect **** got in there and created that pit probably then. OR, it could be an original casting defect that either was missed or didn't raise any concerns so it got used anyway.

 

I have 3rd gen corner seals with rotary aviation soft seal kit where you cut your own inserts.

there is no crack (luckily) which is why I'm debating using it or at least try...


1st rebuild sooo... yeah. hah.


okay you all know how bridgeports work/get their name? Its like its bridged ported the corner seal groove on the rotor. There is a solid metal bridge gap that has been created.


HOWEVER, I do have access to a magnaflux so I cannot hunt for a microscopic crack...

 

What are you getting at? btw in case you didn't understand the metal bridge isn't added to make a bridge port, a slot is cut/drilled between the stock port and the outer edge where the corner of the housing meets the iron.

 

yeah I know that its not added but it was a metaphor for whats happened on the rotor.

 

^ fixed

 

That hole had to have been drilled. 45 degree all the way to the apex seal slot. Strange... I would probably use it if it came from a running motor and didnt' have any weird wear or strange markings/cracks from having it being there... Good luck, nice pictures, and let us know if you have any problems if you do use it...

 

yeah its not drilled, it would much much neater if it was drilled, its like something corroded or scratched its way through...

 

I wouldn't risk it.

 

I'm gonna just assemble it and then check compression and see. Its gonna be the rear rotor.

 

I would be concerned that the corner seal spring could spin and try to seat in that hole causing a spring failure.

 

^^^ that's a good point. The FD springs would stand a better chance, but still does sound iffy.