Rebuilding 4K

[RainWarriorDregs]

Hey guys, Alec here. I've pulled my 4k out and i'm rebuilding currently and i can't for the life of me remember which way this seal goes in. I can't remember what its called, my workshop manual is downstairs. But its the seal that goes into the circular mount (don't worry there are pics haha) that slips over the crankshaft on the back of the engine.

 

ok. These are the parts, the circular mount and the seal.

 

 

Now the seal has two sides, one with a recess and the other side is flat. This is the recessed side

 

 

Now finally here's my question haha. It goes in this way right? with the recessed side down.

 

 

I understand that it needs to be oiled and stuff but my workshop manual specifies that the seal has to be pushed in the same depth as the old one was. Now i don't know this? I didn't take a damn photo, will this be highly detrimental to the engine's life or how it will run?

 

Thanks guys

 

EDIT: thought i'd chuck in a pic of the engine so you guys can have a look. I'm going to make a build thread too, but i just need this info post haste :happy:

 

Edited September 30, 2010 by RainWarriorDregs

[67Rolla-Ken]

You've got it the right way ;)

 

Recess to the inside.

 

Nice looking engine, good work.

[Taz_Rx]

You've got it the right way ;)

 

Recess to the inside.

 

Nice looking engine, good work.

 

:y:

 

Just push it in until its level with the ring around the outside of it.

[camerondownunder88]

You have the seal up the right way.

 

Also your manual isnt 100% correct either when it says install seal to SAME depth.

 

This isnt jsut some old trick that is jsut done it is also done on aircraft etc and many things with these types of seals.

 

Over time the seal wears a groove in the metal part. And starts to leak. Now if you put a new seal in there same depth the lip will be running in the groove and in a lot of cases can leak.

 

now a way around this is to install the seal higher/lower (depends where original seal was) so the sealing lip is now on a fresh section of shaft.

 

This can be done by shimming the installing tool or shimming the seal going into the seal holder.

 

But by the looks of the rebuilt motor your crank shaft wont have a groove and will be a nice fresh surface so jsut seat the seal hard in and drive away for another 500,000Km lol

 

Cameron

[Evan G]

+1 ^^^ do it all the time at work,

 

use the old seal on top of the new seal and tap it in evenly and slowly.

Edited September 30, 2010 by Evan G

[RainWarriorDregs]

Cheers ken, she's been a long time coming aye. I'll pop it in that way then (thanks Taz too!)

 

Yeah cam man, my workshop manual is one of the Haynes one and its pretty shit hey. But it provides a useful base for instructions on doing stuff tho. And yeah the last 4k only made it to 240 000 :( then the first piston decided to eat the exhaust valve somehow! :bash:

 

That's a much better idea than how i was gunna do it evan haha. It's a weird looking seal tho.

 

Well cheers guys, i can cross that off the list now.

 

Here's a sneak peak of what the engine is going back into :wink:

 

[philbey]

remember that there are 2 different size crank seals, one is 11mm and one is 8mm by memory.

 

You'd only get the thinner one if you ordered a 5K seal I think.