2000 civic dx
y8 head abd tranny

i got a y8 tranny for my mini me and i replaced the rear main seal at the same time but i guess i put it in wrong?

when i took off the housing it looked fine though

also my crank has a grove in it.. now im not sure if thats from my old seal or from this one being put in wrong.. i drove about 100 miles with it like this

wont let me post multiple pictures

looked fine when i took off housing

backside

 

I doubt a new seal will groove the crank in 100 miles. However putting the seal in and letting it land in the groove will allow it to leak.

What my local Honda Tech told me is when he finds a groove (cam/crank) he doesn't put the seal in the exact same position. So either the seal goes in deeper or a little shallower so the seal is not in that groove.

I personally add my moly grease to the grease in the seal to add a little more friction modifier to the mix too.

The grooves are a fairly common thing with old motors.

 

well how are you supposed to know where the grove is when you put the seal in..
you cant see it because its in the back of the seal thats where the highest point of the seal is..

but if you look at my seal it looks like it wasnt seated right
when i first put it in it looked good but after it looks like the bottem lip of the seal got pushed up or somthing
however when i took off the housing with the seal still in it looked fine again..
this time im going to put the seal in the housing instead of just puting the seal in without taking the housing off

 

Basically when you went to replace it, you note where the seal is sitting in the housing, is it flush, recessed or sticking out a touch.

Remove seal, see groove, make sure seal inserted to the same depth as orginal seal that you noted before removal.

The second pic in, the seal looks fine for install, just coated in oil. Maybe you are seeing something in person I'm not seeing in the pics.

I do know the seal won't seal if the inside diameter lip ends up sitting back in that groove.

If you have a seal driver you can actually insert the seal deeper into the housing if the old seal was flush with the housing. Or if the old seal was deep you only install flush etc.

 

in the second pic the bottom of the lip is not seated

im not sure where the origional seal was sitting

my origional seal was not leaking i decided to change it because i had the transmission out already

 

what do i install first the housing or the seal?

 

you cant really fit a finger nail on the groove on the crank

should i sand it down and if so what do people use

 

If you can't catch your nail on the groove, it isn't worth even worrying about. You can install it either way, but your life will be easier if you install the seal into the housing, then install the housing on the crank.

 

i see people hitting the crank with steel whool or scotch brite to make a better seal?