Antifreeze on cylinders

S

shanowen1

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Dec 15, 2012
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I accidentally put half a quart of antifreeze in the intake manifold plug. I have removed the plugs and let the antifreeze blow out. I then soaked the cylinders with fogging spray. Is there anything else I should do to minimize the damage?
 
U

UncleWillie

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Re: Antifreeze on cylinders

As soon as you start it up and warm it up to operating temperature, you should be fine.
 
Bondo

Bondo

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Re: Antifreeze on cylinders

shanowen1 said:
I accidentally put half a quart of antifreeze in the intake manifold plug. I have removed the plugs and let the antifreeze blow out. I then soaked the cylinders with fogging spray. Is there anything else I should do to minimize the damage?
Click to expand...

Ayuh,.... Welcome Aboard,.... What manifold plug,..??

On What motor,..??
 
achris

achris

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Re: Antifreeze on cylinders

shanowen1 said:
I accidentally put half a quart of antifreeze in the intake manifold plug. I have removed the plugs and let the antifreeze blow out. I then soaked the cylinders with fogging spray. Is there anything else I should do to minimize the damage?
Click to expand...


Yep. Stop using anti-freeze.:facepalm: Just drain the block and leave it empty. AIR DON'T FREEZE..... Just do a search, you'll find quite a few people who 'anti-freeze' their engine's have a cracked block come spring.
 
thumpar

thumpar

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Re: Antifreeze on cylinders

I would get it running as fast a possible. The heat will burn off any moisture left behind. Then don't use antifreeze. Where I live it is not uncommon to see -20f or below for a spell and I have never used antifreeze in my boat.
 
R

ricohman

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Jul 30, 2011
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Re: Antifreeze on cylinders

I am curious to how you did this. Through the carb?
In any event, if you've blown it out it should be safe to start it up and burn the AF up.
 
JimS123

JimS123

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Re: Antifreeze on cylinders

achris said:
[/b]

Yep. Stop using anti-freeze.:facepalm: Just drain the block and leave it empty. AIR DON'T FREEZE..... Just do a search, you'll find quite a few people who 'anti-freeze' their engine's have a cracked block come spring.
Click to expand...

Anti-freeze don't freeze either. As long as you can be assured that all the water came out, you're OK. But if there is a bit left hanging somewhere, the anti-freeze should mix with it and thus mitigate a potential problem.

My Mercruiser owner's manual actually suggests adding anti-freeze after draining the block. Whats up with that?

In my experience, most cracked blocks I saw were done by winterizing dealers that had poor service departments.
 
U

UncleWillie

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Re: Antifreeze on cylinders

JimS123 said:
... My Mercruiser owner's manual actually suggests adding anti-freeze after draining the block. Whats up with that? ...
Click to expand...

Adding antifreeze to a block that has not been drained just dilutes the antifreeze and you will need to pour twice as much in to flush out the water.

If you are going to use antifreeze;

1. Drain the block.
2. Fill the block with antifreeze using the method of you choice. (Lots of opinions here!)
3. Drain the block again. (Save and Recycle the Antifreeze for use again next year.)

Air doesn't freeze and the residual Antifreeze will protect the remaining low spots if any.
 
G

GasCan II

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Messages
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Re: Antifreeze on cylinders

How about the anti-corrosion benifets from the pink R.V. antifreeze when the block is properly filled ?
 
Bondo

Bondo

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Re: Antifreeze on cylinders

GasCan II said:
How about the anti-corrosion benifets from the pink R.V. antifreeze when the block is properly filled ?
Click to expand...

Ayuh,.... Whatever trips yer trigger,...

Corrosion in a drained motor is immeasurable...

Any corrosion ya see in a motor used in freshwater, happens durin' it's use, not durin' the lay-up period...
 
U

UncleWillie

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Messages
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Re: Antifreeze on cylinders

GasCan II said:
How about the anti-corrosion benefits from the pink R.V. antifreeze when the block is properly filled ?
Click to expand...

Even drained, the Propylene Glycol (PG) is still coating all the metal in the block.
PG is essentially a water soluble Oil.
Dip a pair of old pliers in some PG and let it lie around for a few months; It will still be oily.
The water in the antifreeze will evaporate, but the PG will hang around for many more months that you have patients for.

I peeked under the boat cover last weekend and a few drops of PG that I apparently spilled on the swim platform two Months ago were still wet and oily.
 
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