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sbc 406 sealing issues

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Old Jul 22, 2012 | 09:00 PM
  #1  
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From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
sbc 406 sealing issues

I have a 87 Trans am with a SBC 406

ENGINE,
Eagle crank
Eagle 6-inch H-beam rods
SRP dished pistions (9:1)ish
Sportsman 2 Heads
Cometic MLS head gaskets (Put on the copper coating)
Comp cams extreme energy 284h
Gold crane 1.6 roller rockers
Victor jr. intake
850 demon

The problem im having is, Im getting water in the engine oil i had brand new oil in the car after 10 minutes of ideling it was white. Ive had the engine apart a few times trying to figure out the problem but cant seem to pin point the location of the leak any ideas would be awsome if you got any questions feel free to ask i think i got it all down
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Old Jul 22, 2012 | 09:05 PM
  #2  
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From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Re: sbc 406 sealing issues

Couple pictures of the engine. The one of the engine in the car is before the victor jr. Im going to put that one back on the car this weekend to see if it cures my water in the oil problem
Attached Thumbnails sbc 406 sealing issues-sbc-406.jpg   sbc 406 sealing issues-sbc-4062.jpg   sbc 406 sealing issues-2012-05-04_13-42  

Last edited by ZEXY; Jul 23, 2012 at 08:49 AM.
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Old Jul 22, 2012 | 09:10 PM
  #3  
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From: Mid West
Car: '87 Camaro
Engine: '92 Carb'd 350
Transmission: 700r4
Axle/Gears: factory stock
Re: sbc 406 sealing issues

As in a 70s block?
IIRC, there's something on the block // heads for steam, but Idont recall
what to do with the holes. I don't think a head gasket will fo the trick by itself.
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Old Jul 22, 2012 | 09:11 PM
  #4  
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: sbc 406 sealing issues

Originally Posted by ZEXY
Cometic MLS head gaskets (Put on the copper coating)
Those head gaskest go on dry, no sealer. I would also run a normal felpro gasket on this motor.
Are the heads drilled for steam holes?
Did yo have the machine shop psi test the block and or check it for cracks?? I dumped 4 509 blocks b4 I found a "good" one.

Also check your intake gaskets.

Last edited by TTOP350; Jul 22, 2012 at 09:17 PM.
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Old Jul 22, 2012 | 09:15 PM
  #5  
ZEXY's Avatar
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From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Re: sbc 406 sealing issues

Yes there are steams holes and i have them opened up in the head gaskets like there suppose to be i do believe
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Old Jul 22, 2012 | 09:17 PM
  #6  
ZEXY's Avatar
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From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Re: sbc 406 sealing issues

Originally Posted by TTOP350
Those head gaskest go on dry, no sealer.

Also check your intake gaskets.
Ok we had them dry and it was leaking so thought that could be a problem so we tried it as for the intake gaskets Ive tried a few different ones and took extra care to make sure everything was how it was suppose to be. Gonna try and intake we have laying around to see if it might be the intake

as for the block i havent yet, i didnt have this problem tell the cam swap we did about 2 weeks ago

Last edited by ZEXY; Jul 22, 2012 at 09:21 PM.
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Old Jul 22, 2012 | 09:33 PM
  #7  
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: sbc 406 sealing issues

Did you pull the heads for the cam swap?

If it wasn't leaking befor the cam swap it shouldn't be now unless there is some gasket material stuck and making it leak.

I see you are using head studs also. Those are a pain to seal up. Did you reapply thread sealer to the block threads??
I would ditch the head studs unless your planning forced induction down the road.

Last edited by TTOP350; Jul 22, 2012 at 09:46 PM.
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Old Jul 22, 2012 | 09:39 PM
  #8  
ZEXY's Avatar
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From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Re: sbc 406 sealing issues

Originally Posted by TTOP350
Did you pull the heads for the cam swap?

If it wasn't leaking befor the cam swap it shouldn't be now unless there is some gasket material stuck and making it leak.

I see you are using head studs also. Those are a pain to seal up. Did you reapply thread sealer to the block threads??
Yes i pulled the heads and i did you a sealer on the threads in to the block and i spent more time cleaning the engine then it took to swap the cam and lifters
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Old Jul 22, 2012 | 09:41 PM
  #9  
ZEXY's Avatar
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Joined: Feb 2010
Posts: 54
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From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Re: sbc 406 sealing issues

Originally Posted by TTOP350
Those head gaskest go on dry, no sealer. I would also run a normal felpro gasket on this motor.
Are the heads drilled for steam holes?
Did yo have the machine shop psi test the block and or check it for cracks?? I dumped 4 509 blocks b4 I found a "good" one.

Also check your intake gaskets.
I am going to swap the head gaskets i just didnt want to with the cometic gaskets being 200 bucks for them didnt want to toss them out
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Old Jul 22, 2012 | 09:47 PM
  #10  
ZEXY's Avatar
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Joined: Feb 2010
Posts: 54
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From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Re: sbc 406 sealing issues

Originally Posted by TTOP350
I would ditch the head studs unless your planning forced induction down the road.
I am that was the reason for the cometic head gaskets and the studs
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