Like Tree0Likes

What does it take to freeze & crack an engine block?

Reply
Old 05-18-2007, 10:28 AM
  #31
Registered
 
Downtown42's Avatar
 
Join Date: Nov 2003
Location: 1 Flu Ovr KuKos Nest-WI
My Boats: 2005 42' Fountain SOLD
Posts: 9,950
Default

Engines are in the boat, not on the swim platform cruisin down the highway. No wind chill.

24* for 24hrs is the general rule.

Get the NOAA_ weather data for the region and date time traveled.
Downtown42 is offline  
Reply With Quote
Old 05-18-2007, 10:37 AM
  #32
Registered
 
Join Date: Mar 2007
Posts: 29
Default

Quote:
Originally Posted by mopower View Post
WRONG . Wind chill comes into play on ANYTHING that contains warmth. Shut you car off in a calm 30* night
and a windy 30* night. Restart it 45 mins late. on the windy night the engine temp will have dropped a lot further. Also your home heater will run a lot more on a windy night than a calm night
My bet is the tow person told the storage place he put antifreeze in the engines and they took his word for it. I would have done it myself knowiing it was going north where its cold and NOT depend on anyone else,
That being said , I have backup mechanical temp gauges on my engines that are stainless industrial gauges and have an expanded scale from below freezing to over 250*. after a night in the mid to high 20's both read in the low to mid 40s but this was sitting still with a full cover over the vents.
Wind chill would only cool it off faster not make it colder than the outside temp. 30 degrees is 30 degrees. It's like blowing on your soup it cools if off faster but will not get colder than room temp.
wipeout is offline  
Reply With Quote
Old 05-18-2007, 10:39 AM
  #33
Registered
 
razor1115's Avatar
 
Join Date: Jan 2002
Location: Peoria, IL
My Boats: 1999 35' Fountain
Posts: 320
Wink

Quote:
Originally Posted by mopower View Post
WRONG . Wind chill comes into play on ANYTHING that contains warmth. Shut you car off in a calm 30* night
and a windy 30* night. Restart it 45 mins late. on the windy night the engine temp will have dropped a lot further. Also your home heater will run a lot more on a windy night than a calm night
My bet is the tow person told the storage place he put antifreeze in the engines and they took his word for it. I would have done it myself knowiing it was going north where its cold and NOT depend on anyone else,
That being said , I have backup mechanical temp gauges on my engines that are stainless industrial gauges and have an expanded scale from below freezing to over 250*. after a night in the mid to high 20's both read in the low to mid 40s but this was sitting still with a full cover over the vents.
This is incorrect... wind chill does ONLY affect living tissue. To define, it's the affect the tissue feels that makes it "feel" colder than the actual, ambient temp. This is ONLY PERCEIVED!. Non-living tissue CANNOT get colder than the ambient.

What you are describing is the heat transfer rate due to CONVECTION. This is NOT wind chill, but one of the basic heat transfer modes (Conduction, convection, and radiation).
razor1115 is offline  
Reply With Quote
Old 05-18-2007, 10:44 AM
  #34
Registered
 
razor1115's Avatar
 
Join Date: Jan 2002
Location: Peoria, IL
My Boats: 1999 35' Fountain
Posts: 320
Default

Quote:
Originally Posted by LubeJobs42 View Post


That's amazing, That was my thoughts exactly! I was going to explain it the same way I just thought most of the other members wouldn't understand. This just confirmed my initial hypothasis. Thank you!
Great minds nursed on a steady diet of beer think alike... another hypothesis we should all agree on!
razor1115 is offline  
Reply With Quote
Old 05-18-2007, 10:46 AM
  #35
Platinum Member
Platinum Member
 
CigDaze's Avatar
 
Join Date: Jun 2001
Location: St. Petersburg, FL
My Boats: Cigarette 35 Cafe Racer
Posts: 21,346
Default

Quote:
Originally Posted by razor1115 View Post
Great minds nursed on a steady diet of beer think alike... another hypothesis we should all agree on!
I concur.
CigDaze is offline  
Reply With Quote
Old 05-18-2007, 10:51 AM
  #36
Registered
 
damdonzi's Avatar
 
Join Date: Jul 2003
Location: Kittery Point Maine
My Boats: Intrepid ~ Boston Whaler ~ Kayaks ~ Windsurfers ~ Assorted Tub Toys
Posts: 1,881
Default

24 for 24 is a great rule of thumb.

Even in the Fall October/November when frost can build up on the lawn in the morning, you have not gone through a long enough period of to do this damage. Sun comes up, you're back in the 40's or more and everything is cool. (Get it? A little temp humor here folks.)

Take this from a guy in Maine. Something smells fishy here. If the warehouse was not heated, or didn't go inside right away or....whatever. We always are out at least on Halloween weekend as the last weekend in our boat.

Last edited by damdonzi; 05-18-2007 at 10:52 AM. Reason: type-o
damdonzi is offline  
Reply With Quote
Old 05-18-2007, 11:14 AM
  #37
Registered
 
Roger 1's Avatar
 
Join Date: Dec 2002
Location: Kankakee Illinois
My Boats: 1993 Cigarette Top Gun
Posts: 3,702
Default

Quote:
Originally Posted by Brad Zastrow View Post
It would take a hard freeze of about 20 degrees for a day. 30 degrees would not do it for 4 hours. More to this story I bet.
Yep!
Roger 1 is offline  
Reply With Quote
Old 05-18-2007, 11:28 AM
  #38
Registered
 
sleeper_dave's Avatar
 
Join Date: Apr 2005
Posts: 725
Default

I skipped over some of the thread.

Anything's possible, but it's highly unlikely that 30F for 4-5 hours cracked a block. The wind might have brought the temp of the block down to 30 a little faster, increasing the risk, but wind would not make it colder than the ambient temperature.

Forget about antifreeze, if there's a possibility of short-term freezing temps, the best thing to do is just drain the blocks and exhaust manifolds. Just draining the motor is likely enough to prevent freezing for a whole winter, but not recommended. For a short term cold snap it's all you need to do.

Wind chill and heat index are just ways of measuring our body's response to environmental conditions. Heat is transferred 3 ways, convection, conduction, and radiation. Our bodies stay at a relatively constant temperature, and produce heat. we need to be in a slightly colder environment than our bodies temperature in order to maintain an appropriate body temperature. If heat escapes our body too fast, we feel cold, not fast enough, we feel warm. The rate at which heat enters or leaves our body is determined by conduction, convection, and radiation. You feel the warmth from a sunny day, that's radiation. You feel the cool breeze, that's convection. You touch the cold engine block (or the hot one) that's conduction. Wind is no colder than the surrounding air, it's just that more air is passing your body (or your boat, engine, etc.) It will increase the convection and the temperature will drop to the temperature of the air faster. But if you put something out in 30 degree weather, it won't get any colder than 30 degrees just because it's windy. If it's touching ground that's colder, it may lose additional heat through conduction, if it's sunny out, it may get warmer due to radiation. If it's windy out, it will get down to ambient (or up to ambient) significantly faster, though.
sleeper_dave is offline  
Reply With Quote
Old 05-18-2007, 11:40 AM
  #39
Registered User
Gold Member
 
bcfountain's Avatar
 
Join Date: Apr 2007
Location: prince george,va
My Boats: 27fountain/04waverunner/10meter
Posts: 1,476
Default

my 2cents worth.i have left my boat out in the cold[28degrees,or less] for 2 days w no cover.nothing never froze.i have worked in houses that had no heat for weeks,in frezzing weather w/hydro heat and cast iron radators and never frose.and some of these houses were reallll lose,rentals.
bcfountain is offline  
Reply With Quote
Old 05-18-2007, 01:57 PM
  #40
RBT
Registered
 
Join Date: Apr 2006
Location: Muskoka Canada
My Boats: Donzi, Pachanga, STV... the worlds fastest production lake boat @ 151.5mph
Posts: 287
Default

General rule up here in Canada is -5 for 12 hours ( celcius, which is about 23 F ), and you start to worry.
RBT is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MarkSmith
Northern Illinois Offshore Club
2
03-24-2007 09:41 PM
FREEZE FRAME VIDEO
General Boating Discussion
3
02-20-2007 03:13 PM
gripit
General Q & A
2
12-05-2005 07:23 AM
klmken
General Q & A
3
07-17-2005 07:26 PM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 03:57 AM.


Copyright 2011 OffShoreOnly. All rights reserved.