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I was talking to this shop, about how I am going to replace my clutch, and the guy said I need to replace my rear main seal. WTF is that? He wanted $16 for it. Do I need it?

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Kris94G20™
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Your rear main seal is the last seal or first depends on how you look at it. but any way its the seal thats on the crank just behind the flywheel. if its not leaking there is no need to replace it.
 

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<font face="Verdana, Arial" size="2">Originally posted by Nick:
Your rear main seal is the last seal or first depends on how you look at it. but any way its the seal thats on the crank just behind the flywheel. if its not leaking there is no need to replace it. </font>

Rear main seal is behind the flywheel. Front main seal is behind the crank pulley. For $16.00 thats real cheap insurance, I say go for it that way you won't have to worry about it for another set of years. You don't need ot do it but if you are resurfacing the flywheel for $16.00 it is weoll worth it. I think a seal is like $5-10 anyway.
 

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Would this have anything to do with say, oil leakage? The motor I have in now, is leaking oil, so would it be a good idea?
 

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<font face="Verdana, Arial" size="2">Originally posted by kbslacker:
Would this have anything to do with say, oil leakage? The motor I have in now, is leaking oil, so would it be a good idea?</font>
Maybe. Just do it. Can't hurt for $16.00. Do it now while the tranny is out. You know how much it will cost you to do later??? Big friggin bucks. Like I said, cheap insurance.
 

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Is are main seal a one peace or two peace?
I had to change one once and it was a one peace one, and I think I had to take the whole crank out, to change it.
It was a pain in the ass to do. I think it was on a caviler hatch back.
Kinda hard to remember. it was a long time ago almost five years ago.
 
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both seals are one pieces. I had to replace my rear main seal and if it is leaking and your tranny is already out that is good but you still have to take both oil pans off in order to get the two bottom screws out. It is not really that hard I already did it.
 

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The middle part is a new rear main seal:



Here's the end of the crankshaft with the tranny, clutch, flywheel, rear main seal and real main seal retainer removed:



Another pic of it:



Here are two rear mail seals + retainers. On ewas busted at the bottom because I had forgotten to undo those two little nuts under that cover and tried to remove the oil pan.



This is a BAD thing. Don't do this.


If he only wants $16 I'd say go for it. The part is cheap, but it's a PITA to pound it out of the retainer and with enough care not to bust/bruise/chip the retainer. Pounding it in is not fun either. Then you have to use RTV when you put it back, use a torque wrench on the nuts, basically a big PITA. Pay the $16.
 
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