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Does an 86 IROC have a one piece crank seal?

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Does an 86 IROC have a one piece crank seal?

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Old

Apr 21, 2015 | 06:55 PM

#1

Thread Starter

Supreme Member

Joined: Jan 2000

Posts: 1,199

Likes: 93

From: Mississauga, Ontario Canada

Car: 1987 GTA

Engine: 5.7

Transmission: T5WC

Axle/Gears: 3:27

Does an 86 IROC have a one piece crank seal?

I'm looking at a donor car for an 87 GTA T5 swap. Does the 86 have a one piece rear main seal? I don't want it If the flywheel won't fit the 87 5.7 crank.

Old

Apr 21, 2015 | 07:07 PM

#2

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Joined: Mar 2007

Posts: 45

Likes: 1

Re: Does an 86 IROC have a one piece crank seal?

I think the crank and block changed in 87.

Old

Apr 21, 2015 | 07:13 PM

#3

Supreme Member

Joined: Jan 2000

Posts: 3,178

Likes: 48

From: Tracy, CA

Car: '87 IROC

Engine: LB9

Transmission: TH700R4

Re: Does an 86 IROC have a one piece crank seal?

FWIW, Rock Auto's catalog shows a 1-piece rear main for '86.

Old

Apr 21, 2015 | 07:14 PM

#4

Thread Starter

Supreme Member

Joined: Jan 2000

Posts: 1,199

Likes: 93

From: Mississauga, Ontario Canada

Car: 1987 GTA

Engine: 5.7

Transmission: T5WC

Axle/Gears: 3:27

Re: Does an 86 IROC have a one piece crank seal?

If that's the case, will the T5 from the 86 still mate with the 87 providing I source A proper flywheel?

Old

Apr 22, 2015 | 08:39 AM

#5

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From: Hurst, Texas

Car: 1983 G20 Chevy

Engine: 305 TPI

Transmission: 4L60

Axle/Gears: 14 bolt with 3.07 gears

Re: Does an 86 IROC have a one piece crank seal?

Quote:

Originally Posted by EDGE

If that's the case, will the T5 from the 86 still mate with the 87 providing I source A proper flywheel?

Yes thats all you will need, however the 86 should also be a 1-piece rear main.

Old

Apr 22, 2015 | 08:44 AM

#6

Thread Starter

Supreme Member

Joined: Jan 2000

Posts: 1,199

Likes: 93

From: Mississauga, Ontario Canada

Car: 1987 GTA

Engine: 5.7

Transmission: T5WC

Axle/Gears: 3:27

Re: Does an 86 IROC have a one piece crank seal?

Quote:

Originally Posted by Fast355

Yes thats all you will need, however the 86 should also be a 1-piece rear main.

That would be a bonus then. I was hoping to just be able to resurface the flywheel

Old

Apr 22, 2015 | 08:50 AM

#7

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iTrader: (2)

Joined: Jan 2005

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From: Hurst, Texas

Car: 1983 G20 Chevy

Engine: 305 TPI

Transmission: 4L60

Axle/Gears: 14 bolt with 3.07 gears

Re: Does an 86 IROC have a one piece crank seal?

Quote:

Originally Posted by EDGE

That would be a bonus then. I was hoping to just be able to resurface the flywheel

One other thing, if the engine came from an automatic car you will need to press a pilot bearing into the crankshaft after polishing up the area machined for it with emery cloth

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Old

Apr 22, 2015 | 08:54 AM

#8

Thread Starter

Supreme Member

Joined: Jan 2000

Posts: 1,199

Likes: 93

From: Mississauga, Ontario Canada

Car: 1987 GTA

Engine: 5.7

Transmission: T5WC

Axle/Gears: 3:27

Re: Does an 86 IROC have a one piece crank seal?

Quote:

Originally Posted by Fast355

One other thing, if the engine came from an automatic car you will need to press a pilot bearing into the crankshaft after polishing up the area machined for it with emery cloth

The engine is my 5.7 mated to a 700R4 right now. You're saying I have to press a bearing into the back of my engine?

Old

Apr 22, 2015 | 09:30 AM

#9

Supreme Member

iTrader: (2)

Joined: Jan 2005

Posts: 10,438

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From: Hurst, Texas

Car: 1983 G20 Chevy

Engine: 305 TPI

Transmission: 4L60

Axle/Gears: 14 bolt with 3.07 gears

Re: Does an 86 IROC have a one piece crank seal?

Quote:

Originally Posted by EDGE

The engine is my 5.7 mated to a 700R4 right now. You're saying I have to press a bearing into the back of my engine?

Yea the bearing presses into the crankshaft at the flange where the crankshaft bolts.

Old

Apr 22, 2015 | 09:53 AM

#10

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Joined: Mar 2007

Posts: 45

Likes: 1

Re: Does an 86 IROC have a one piece crank seal?

pilot bearing/bushing basically never installed in the crank of an engine for an automatic trans. not a big deal to install, I use a socket and hammer although I'm sure there's some kind of special tool out there somewhere.

Old

Apr 22, 2015 | 09:54 AM

#11

Thread Starter

Supreme Member

Joined: Jan 2000

Posts: 1,199

Likes: 93

From: Mississauga, Ontario Canada

Car: 1987 GTA

Engine: 5.7

Transmission: T5WC

Axle/Gears: 3:27

Re: Does an 86 IROC have a one piece crank seal?

Quote:

Originally Posted by Fast355

Yea the bearing presses into the crankshaft at the flange where the crankshaft bolts.

This can be done with the engine in the car I assume.

Old

Apr 22, 2015 | 07:41 PM

#12

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Joined: Mar 2007

Posts: 45

Likes: 1

Re: Does an 86 IROC have a one piece crank seal?

yep, about like installing a freeze plug. 2 or 3 lb hammer is good.

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