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Rear Main Seal replacement in a 2-piece block

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Old Nov 5, 2001 | 08:30 PM
  #1  
Jim85IROC's Avatar
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From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
Rear Main Seal replacement in a 2-piece block

I've begun my 700R4 to T5 swap, and I've got to replace the rear main seal. 10k miles on the motor and it leaks like a screen door. Does the engine have to come right out of the car or can I get away with lifting it up a few inches? I want a 1-piece rubber oil pan gasket (that fugger leaks too), but I've heard that it makes the oil pan sit a little lower. I've got a cast aluminum pan, and as it is the fins already hit my exhaust.

Anyway, what am I in for on this project?

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The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
Custom Thirdgen Subwoofer Enclosures
"I didn't know a bored out Ford could go so slow" -Shenandoah
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Old Nov 5, 2001 | 09:14 PM
  #2  
burntblues's Avatar
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Joined: Jul 2000
Posts: 580
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From: Charlotte, NC
Car: 1989 Camaro RS
Engine: 355 mildly modified
Transmission: 700R4 fully modified
With the 700r4 out you shouldn't have too hard of a time replacing the rear main seal.

Someone did a tech article on the replacement of the oil pan gasket. I haven't read it, but I would think that with the tranny out it would simply be a matter of jacking up the rear of the block and sliding the pan in.

Good luck with the seal swaps man.

Mike

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1989 RS.. 355, Hypereutectic pistons, double roller cam, double roller timing chain, accel wires, blue streak cap and rotor, rapidfire plugs, chevy caprice 350 chip, 200* fan switch, 3 angle valve job, 3 inch cat-back exhaust, 3 core radiator, 3.73 gearing with POSI.
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Old Nov 6, 2001 | 06:15 PM
  #3  
Jim85IROC's Avatar
Thread Starter
TGO Supporter
iTrader: (2)
 
Joined: Jul 1999
Posts: 13,579
Likes: 9
From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
I read Phil Parsins' article, and the motor needs to be lifted up a few inches. If I'm going to go through that hassle, I might as well just pull the bastard out and do it on a stand. 10k miles on the motor and I've already got to pull it.

------------------

The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
Custom Thirdgen Subwoofer Enclosures
"I didn't know a bored out Ford could go so slow" -Shenandoah
Reply
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