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Old 07-28-2011, 12:40 AM   #1
redmonster
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Angry Hate this shtuff

Went to primos house bout twenty minutes away
Coming home engine got so hot blew new upper radiator
Hose
Fresh rebuild whats going on help help
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Old 07-28-2011, 12:51 AM   #2
PHAT TONY
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Re: Hate this shtuff

Sounds like an air pocket in the motor; prevents the coolant from circulating properly. Raise the front end high as possible and run the motor till it heats up, be careful though; once the thermostat opens and that air heads out it'll push a ton of HOT antifreeze out as well! I've had to do this a couple times.
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Old 07-28-2011, 01:37 AM   #3
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Re: Hate this shtuff

Remove the thermostat and Drill a tiny hole in it to allow trapped air to escape and allow the coolant to contact the thermostat and open it.
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Old 07-28-2011, 06:40 AM   #4
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Re: Hate this shtuff

can b lots of things/wrong direction water pump/bad or incorrectly installed thermostat/collapsed lower radiator hose/ a leaky connection not enough coolant/incorrectly installed intake or head gaskets/ bad timing adjustment/rad fan not working properly

those are all fairly common problems
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Old 07-28-2011, 01:49 PM   #5
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Re: Hate this shtuff

Plus, rebuilt engines running a bit hotter than ones that are broken because of all the surfaces that are establishing a wear pattern. If you have an EGT sensor, you can really tell when the rings seat themselves. The EGT temp will drop like a rock.
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Old 07-28-2011, 01:52 PM   #6
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Re: Hate this shtuff

1st thing I would do is change the thermostat.
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Old 07-28-2011, 09:25 PM   #7
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Re: Hate this shtuff

did it over heat and blow the hose, or are you assuming it overheated before the hose popped?
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Old 07-29-2011, 12:48 AM   #8
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Re: Hate this shtuff

Are you runnin' the 40 year old stock original radiator as well?

Gary
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Old 07-29-2011, 01:26 PM   #9
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Re: Hate this shtuff

Gary yes the radiator is original but before it went in was acid washed
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Longhorn man the upper and lower radiator hoses were brand new after the rebuild
When going one the road sounded like a boiling kettle look at temp gauge was way over h so shut it off popped open hood and bam a small hole in the upper hose
Why did u ask
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Old 07-29-2011, 01:32 PM   #10
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Re: Hate this shtuff

Took out thermostat replaced hose still running hot y y y
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Old 07-29-2011, 02:18 PM   #11
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Re: Hate this shtuff

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Gary yes the radiator is original but before it went in was acid washed
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Longhorn man the upper and lower radiator hoses were brand new after the rebuild
When going one the road sounded like a boiling kettle look at temp gauge was way over h so shut it off popped open hood and bam a small hole in the upper hose
Why did u ask
What is "acid washed"? Do you mean "flushed". Most radiator fushes won't get 40 years of crud built up on the core out of the radiator. It might need to either be rodded out or a new radiator.

Longhornman was basically stating that if you didn't notice the overheat before the hose popped... there might be other damage.

Gary
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My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

Quote:
Originally Posted by LONGHAIR View Post
I would never rebuild a 305.
Quote:
Originally Posted by prostreetC-10 View Post
I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
Quote:
Originally Posted by Marv D View Post
Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
Quote:
Originally Posted by cableguy0 View Post
Its cheaper to listen to advice given when you ask for help than it is to ignore everyone and wait for carnage.
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Old 07-29-2011, 03:13 PM   #12
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Re: Hate this shtuff

His engine may well be overheating, but it shouldn't blow a hose (especially a new one) because of the pressure relief on the radiator cap, which no one has mentioned yet. Try a new stat & rad cap, and make sure you get all the air burped out of the cooling system.
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Old 07-31-2011, 02:44 AM   #13
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Angry Re: Hate this shtuff

Would u guys suggest getting a new radiator for the 250 I6 didnt even make it to the store
Bout quarter mile now the drive belt busted


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