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smoke out of valve covers

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Old 03-04-2007 | 07:59 AM
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smoke out of valve covers

new rebuild everything checked out great,got car running and smoke is coming out of both VC breathers,internals all checked out on tear down?/?//
Old 03-04-2007 | 08:01 AM
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From: Mobile, AL
Car: GTA
Engine: 383 HSR
Transmission: TH-700R4
Axle/Gears: 3.42
Blowby.... Something is wrong with your rings....

If you plugged up the breather holes and revved it I bet your dipstick will shoot out.

What exactly did you rebuild?
Old 03-04-2007 | 08:07 AM
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this engine was just rebuit not by me and i inspected everything
Old 03-04-2007 | 08:10 AM
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From: Mobile, AL
Car: GTA
Engine: 383 HSR
Transmission: TH-700R4
Axle/Gears: 3.42
I still think you have blowby. Bad ring(s)
Old 03-04-2007 | 08:10 AM
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sorry its a 73 350 2bolt with double hump fuelie heads 2.02 -1.96 has solid lifter cam i don't know alot about the cam because i bought the engine after it was already rebuilt,was told only had 20 miles on rebuild
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i agree with you 100% on the blowby just having a hard time understanding why,what would your recommendation be as the easy fix?

Last edited by curtistimmerman; 03-04-2007 at 08:12 AM. Reason: Automerged Doublepost
Old 03-04-2007 | 08:23 AM
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Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
Have you driven it yet?

I recently put a Ford together (I know... ) and it smoked until it broke in. I have seen a few engines that smoked until the rings seated. Its not a normal thing though.

I would contact the engine builder ASAP. They might try to say that you did an improper break-in though so be prepared to put up a fight.
Old 03-04-2007 | 08:52 AM
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thing is cant get any response from the builder of the engine,from what i know it was built to race came out of a gutted out 73 camaro
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and said it made 4 passes down the track,yes i have ,got exhaust put on last night timing a little off yet but she will move ,not happy with throttle response

Last edited by curtistimmerman; 03-04-2007 at 08:54 AM. Reason: Automerged Doublepost
Old 03-04-2007 | 08:59 AM
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Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
Originally Posted by curtistimmerman
thing is cant get any response from the builder of the engine
Uh oh... I would take a trip to his location. How much did you pay for that engine?
Old 03-04-2007 | 09:01 AM
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1500 for the whole car sold the car for 500 kept the 350/350th one thing stumpping me also is alot of soot building up on plugs and exhaust
Old 03-04-2007 | 09:08 AM
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i tore the whole engine down when i got it home and regasketed the whole thing the pistons and everything looked greatput a new performer rpm intake and a new 750 edel performer carb on also,thanks to everybody for the replies just stummped,,,
Old 03-04-2007 | 09:24 AM
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From: Mobile, AL
Car: GTA
Engine: 383 HSR
Transmission: TH-700R4
Axle/Gears: 3.42
Here is something silly, This happened to me once and it turned out not to be the rings... it turned out that I had the wrong dipstick and I had put WAY WAY too much oil in the pan. Instead of 5 quarts I put in 8.
Old 03-04-2007 | 09:28 AM
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i actually just changed the oil in it pit rotella 15w-40 in it and the smoking wasn't quite as bad,it only has 5qts in it,could it be all the lubricants and stuff?i would think that would of went away after the oil change becuz i changed it before i even drove it?
Old 03-04-2007 | 09:37 AM
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From: MD
Car: '88 IROC-Z medium orange metallic
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27
Every engine will have a certain amount of blowby. No such thing as 100% sealed cylinders. That's why PCV systems were invented. Now if you're having problems with pressure blowing out gaskets and such then you may have an issue with too much blowby. Try a PCV system and see if it helps.

Also make sure it's steam instead of smoke.
Old 03-04-2007 | 09:44 AM
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not having any specs on the cam except knowing it has a 480/480 lift and don't know who made it because there are no numbers on the cam just a colored dot and knowing its a solid lifter cam what would anybody suggest for adjusting the rockers ?right now i have it
.026 and they make some noise and i can move the rocker fairly easy when valve isclosed and the open valve spring is pretty tight?
Old 03-04-2007 | 09:55 AM
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Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
Originally Posted by curtistimmerman
1500 for the whole car sold the car for 500 kept the 350/350th one thing stumpping me also is alot of soot building up on plugs and exhaust
Sounds like its running really rich!

Run a compression check and see whats up. Also, I would lean it out a little.

Carb or EFI? If its carbed, are you running a Holley? If so, is the power-valve blown out?
Old 03-04-2007 | 09:59 AM
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it's a new out of the box 1407 edel 750cfm i have adjusted the idle mixture screws not to familiar with carb adjust,any help on adjusting fuel mixture?
Old 03-04-2007 | 10:25 AM
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From: DC_MD_VA Area
Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
Originally Posted by curtistimmerman
it's a new out of the box 1407 edel 750cfm i have adjusted the idle mixture screws not to familiar with carb adjust,any help on adjusting fuel mixture?
I havent played around with too many Edelbrock carbs but this is how I set Holley's...

With the engine off, I turn both idle mixture screws all the way in and then I back them off 1 full turn. Start the car and set the idle where you want. Then turn the idle mixture screws in until you hear the engine idle speed start to drop then go back 1/4 turn. Adjust the idle mixture screws one at a time.

Another way is to adjust the idle mixture screws while looking at a vacuum gauge. Adjust each screw until you get max vacuum. Again, adjust one idle mixture screw at a time.
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