Intake gasket question - Team Camaro Tech
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post #1 of 17 (permalink) Old Dec 23rd, 08, 07:50 PM Thread Starter
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Chris
 
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Intake gasket question

Can a bad or improperly installed intake gasket allow coolant to enter the cylinders? It's on a 327.
I installed an Edlebrock aluminum intake (2101) but used the incorrect basic FelPro SBC intake gasket set and I have the dreaded white smoke comming out the exhaust. I have true dual exhaust (no cross-over pipe) and white is comming out both pipes. I did just install rebuilt heads (stock low performance 1.95's) but I am confident I installed the head gaskets correctly.
I have only run the engine for about 1 hour total and one quick trip around the block and the intake gaskets are stained where part of the gasket is exposed between the intake runners:




Any chance this is where my coolant leak to the cylinders is? I can't determine what the stain is from. I can't smell it but It tastes bitter (I rubbed my finger on it and tasted it). I was hoping it would taste sweet (coolant).

The heads were rebuilt at a very reputable speed shop. I can't believe they are cracked and i used the head gaskets they sold me.

I just bought the correct edelbrock gaskets and will be installing them this weekend in hopes of eliminating the white smoke issue.

Thanks for any thoughts.

Chris
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post #2 of 17 (permalink) Old Dec 23rd, 08, 07:56 PM
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Re: Intake gasket question

White smoke is oil burning I believe. Should clear up with correct gaskets imho.

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post #3 of 17 (permalink) Old Dec 23rd, 08, 08:25 PM
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Re: Intake gasket question

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Originally Posted by HOGDADDY View Post
White smoke is oil burning I believe. Should clear up with correct gaskets imho.
Black smoke is rich a/f ratio.Blue smoke is oil consumption.White smoke is coolant and/or trans fluid introduced into the combustion chamber.White fog in low ambient temps is a street level con trail..look up to the sky for examples of this.

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post #4 of 17 (permalink) Old Dec 23rd, 08, 08:28 PM
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Re: Intake gasket question

Getting the right size of gasket helps. Measure the intake ports of both the manifold and the heads and buy the size fitting both.

Match them up to the intake and to the head using the bolt holes as guides for gasket location. Check for good contact of gasket to mating surfaces to seal both, the port and crankcase. I have used embossed, blue ones and paper ones and have not had a problem - knock on wood. Just be sure when the maniflod is set onto the heads, the gaskets align with the bolt holes.

Also, make sure the bolts are not too long to interfere with intake pushrods. Seems to me, an inch long bolt is a good length. Gasket sealer on the bolt threads, those ten bolts on the inside, to prevent oil leaking/weeping through the threads. The four outside bolts are blind holes, so no oil/water leaks through them.

Don't use the rubber end seals either. They will not squeeze enough thus not allow the manifold to interface correctly with the heads. Use a 1/4 inch diameter bead of RTV in their place after cleaning surfaces with lacquer thinner or BraKleen to remove any traces of oil. Leave set overnight to cure, finish filling with coolant and fire it up. Tighten manifold bolts after warm-up, then a month later.

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post #5 of 17 (permalink) Old Dec 24th, 08, 07:08 AM
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Re: Intake gasket question

Every thing Everett#2390 said is dead on but the only thing I would do different is use Permatex The Right Stuff instead of regular RTV. That Right Stuff is a little more expensive but it works better than anything I ever used and also you can fire your car up as soon as youre done. I must of redone my intake gasket a dozen times follow the installation to the letter & everytime I used regular RTV it always leaked at the back of the intake. Once I used The Right Stuff the leak was gone now I use it on everything. I just read my post and it sounds like I have stock in the company (I dont) this stuf just really made my life easier.

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post #6 of 17 (permalink) Old Dec 24th, 08, 07:10 AM
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Re: Intake gasket question

Black rtv is the best imo...right stuff works great too...
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post #7 of 17 (permalink) Old Dec 24th, 08, 07:21 AM
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Re: Intake gasket question

I use Chrysler's Black RTV, could be the same commerical black RTV, but I tried it and never use anything else.

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post #8 of 17 (permalink) Old Dec 24th, 08, 08:50 AM
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Re: Intake gasket question

Quote:
Originally Posted by fatblock View Post
Black smoke is rich a/f ratio.Blue smoke is oil consumption.White smoke is coolant and/or trans fluid introduced into the combustion chamber.White fog in low ambient temps is a street level con trail..look up to the sky for examples of this.
Ooops.......... I stand corrected sorry.

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post #9 of 17 (permalink) Old Dec 24th, 08, 09:08 AM
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Quote:
Originally Posted by Everett#2390 View Post
I use Chrysler's Black RTV, could be the same commerical black RTV, but I tried it and never use anything else.
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post #10 of 17 (permalink) Old Dec 24th, 08, 09:24 AM
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Re: Intake gasket question

Want to have some fun? Don't do this on your good cars. Run the idle up to about 1500 or so and very slowly pour small amounts of auto trans fluid into the carb. You can smoke out the neighborhood. I used to work for a fellow who believed this was the greatest thing in the world to clean plugs and combustion chambers. The sheriff's office was right across the street and it would just get covered in white smoke.
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post #11 of 17 (permalink) Old Dec 24th, 08, 09:43 AM
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Re: Intake gasket question

We use to do that with mazda rx7's in the winter time to build up compression so they would start in the cold weather...dump ya a qt of t.fluid right into the intake and watch her smoke...
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post #12 of 17 (permalink) Old Dec 24th, 08, 10:30 AM
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Re: Intake gasket question

Quote:
Originally Posted by Moonpie View Post
Want to have some fun? Don't do this on your good cars. Run the idle up to about 1500 or so and very slowly pour small amounts of auto trans fluid into the carb. You can smoke out the neighborhood. I used to work for a fellow who believed this was the greatest thing in the world to clean plugs and combustion chambers. The sheriff's office was right across the street and it would just get covered in white smoke.
My buddy made a smoke system on a '78 Cordoba using this method. He plumbed the windshield squirter into the headpipe and put ATF in the resevoir. Talk about white smoke!!
We're still laughing about it 20 years later!

I wish I had one on my commuter car to keep the tailgaters off me!

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post #13 of 17 (permalink) Old Dec 24th, 08, 12:41 PM
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Re: Intake gasket question

Make sure the smoke you are seeing isn't just because the hot exhaust is exiting into the cold air. If you are in fact burning coolant, the level in the radiator will drop. You should be able to smell it also. Coolant has a sweet smell to it.

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post #14 of 17 (permalink) Old Dec 26th, 08, 06:31 PM Thread Starter
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Re: Intake gasket question

Quote:
Originally Posted by 67CamaroRS/SS View Post
Make sure the smoke you are seeing isn't just because the hot exhaust is exiting into the cold air.
I don't think that's the case. It's 80 down here in Tampa.

I get to drive my car 365 a year (when it's not smoking of course)

I'm going to change the gasket using the Edelbrock 'Gasgacinch" this weekend and use the Great Stuff on the ends and see what happens.

Chris
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post #15 of 17 (permalink) Old Dec 27th, 08, 08:37 AM
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Re: Intake gasket question

With an aluminum intake you should use the Fel Pro set #1256. They are black with a blue silicone seal. They are soft. Edelbrock may go by the same number. The hard blue gaskets won't seal as well with aluminum, but are ok for cast intakes.
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