antifreeze coming out of heads!! - Hot Rod Forum : Hotrodders Bulletin Board
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Old 05-14-2004, 10:12 PM
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antifreeze coming out of heads!!

i just put my engine in my car and filling up the radiator and i hearad somthing driping and the anti freeze is coming out of the 1 bolt hole on p****enger side where the headers bolt up... theres no exaust on hooked up to the cylinder heads.... did i do somthing wrong putting the enigne togther or is it coming out of there because i have no headers bolted up??? ahhhh its 10pm and i gota be up for work in 8 hours. i hope it isnt going into the cylinders or anyting.... just great
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Old 05-14-2004, 10:19 PM
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Montea,

I have not seen this happen before, but this might be a first.
What heads do you have on the engine? Stock or aftermarket?
What work was done on the head in question. Are both heads leaking?
To check to see if the coolant is entering the engine. Pull the dip-stick and note where the oil level is at that moment. Wait a few minutes and put the dip-stick back in and see if the level has gone up(this would be bad) or if it stayed the same.

Good Luck
Scholman
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Old 05-14-2004, 10:34 PM
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1982 chevy 267 engine with stock 1980 305 heads.. i looked up the # and the 305 heads were used on 267 and 305. just the passenger side head is leaking. i think its to late now to do the dipstick test. it has stoped pouring out of the hole
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Old 05-14-2004, 10:36 PM
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Are you sure it isn't coming out of the temp. sensor?
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Old 05-14-2004, 10:42 PM
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ya im shure.... its coming out of the one bolt hole of exaust port for cyl #2
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Old 05-14-2004, 10:45 PM
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Well, If I were you I would put a generous amount of RTV on the bolt for that hole and bolt the exhausts up. It might just seal and work fine.
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Old 05-14-2004, 11:12 PM
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ok i guess ill just put some sealant on that bolt that goes in there.

is there any way of telling if the antifreeze is leaking into other parts of the engine as well?

i ordered some headers tonight and they will be in sometime next week. so ill fire it up probaly next weekend

i just dont understand the heads are the same thing just the intake ports are a bit bigger... even the head gaskets i got were for 267/305 engines. only thing is maybe a differnt design blocks/heads from 80-82 or somthing? i dont see why there would be though.
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Old 05-15-2004, 12:15 AM
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There were no difference in the blocks and heads, and pretty much all sbc head gaskets from that generation are interchangeable. The only thing I can think of is the bolt hole has made it`s way into a water jacket, Possibly it was drilled too deep from the factory and it left it thin in this area, or was the bolt hole heli coiled and drilled too deep maybe. shine a flash light in the hole and see if you can tell where the source of the coolant is coming from, if it has tapped into the water jacket, then just do as you plan, sealant on the bolt, and check the tightness of it often, especially when you install new headers, the bolts tend to loosen a bit until there seasoned in, check them after ever use after the engine has cooled.
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Old 05-15-2004, 08:03 AM
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Quote:
Originally posted by scholman
Montea,

I have not seen this happen before, but this might be a first.
What heads do you have on the engine? Stock or aftermarket?
What work was done on the head in question. Are both heads leaking?
To check to see if the coolant is entering the engine. Pull the dip-stick and note where the oil level is at that moment. Wait a few minutes and put the dip-stick back in and see if the level has gone up(this would be bad) or if it stayed the same.

Good Luck
Scholman

or take the spark plugs out,and rotate the engine by hand, (NOT WITH THE KEY you could hurt something if it has water on top of the piston .. ) any water will come out,but like scholman said , the oil level will be up on the stick.
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Old 05-15-2004, 08:17 AM
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my 1975 oldsmobile 350 heads are doing the same thing as montea's.
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Old 05-15-2004, 06:42 PM
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If putting a bolt in the hole fixes it, don't worry about it. My Dodge 360 does the same thing.
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Old 05-15-2004, 10:06 PM
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Montea,
I think I would put in a stud instead of a bolt. That way you will not be removine and replacing a bolt just the nut that holds the header.
Just a thought
Scholman
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Old 05-15-2004, 10:28 PM
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Quote:
Originally posted by scholman
Montea,
I think I would put in a stud instead of a bolt. That way you will not be removine and replacing a bolt just the nut that holds the header.
Just a thought
Scholman
That is a good idea. Just don't get the ARP stud kit. It doesn't work with headers. I got a set and the nuts were 9/16". There was no way in hell they would clear even a 1 1/2" primary tube.
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Old 05-16-2004, 08:07 AM
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coolant

I am sure its not leaking into the combustion chanber but if it is checking the oil level will not tell you a thing. Think of it you pull a head and coolant goes down the cylenders, it will not leak past the rings even if you have the engine apart a week before you clean the coolant out of the hole. To check it you would have to pull the plugs and turn the engine over. so that the cylender in question is about half way up then look doen the hole with a flash light.
Jesse
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Old 05-16-2004, 05:56 PM
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60convert,
Coolant will get past the rings because of the .016-.018 end-gap. I think I would just pull all of the plugs and turn the key(disconnect primary voltage to coil first). Any cylinder that has water in it will blow like a whale.
Scholman
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