351M Problem
Posting Guru
Joined: Jul 2007
Posts: 1,355
Likes: 1
Don t really know why but yes it would, i had that problem and had the radiator exit tubes welded backwards, I think it has something to do with the dirction the waterpump sends the water preasure and the positions of the exits, I dont really know but my car did overheat due to that..
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Junior User
Joined: May 2008
Posts: 64
Likes: 0
From: Union,NJ
Im switching the pipes today
The more I think about it, the more I think thats the problem
Coolant enters the engine through the lower hose and exits the upper
there is no way air can get out of the system if its drawing coolant from the top of the radiator
Ill post later to let you know the outcome
The more I think about it, the more I think thats the problem
Coolant enters the engine through the lower hose and exits the upper
there is no way air can get out of the system if its drawing coolant from the top of the radiator
Ill post later to let you know the outcome
Thread Starter
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Junior User
Joined: May 2008
Posts: 64
Likes: 0
From: Union,NJ
Problem not solved --still overheats
no coolant comming out of thermostat housing when hot
im going to pull the heads this weekend and check the block passages and replace the head gaskets
what about the coolant plug on the mounting surface of the Aussie heads ?
does it need to be removed ?
no coolant comming out of thermostat housing when hot
im going to pull the heads this weekend and check the block passages and replace the head gaskets
what about the coolant plug on the mounting surface of the Aussie heads ?
does it need to be removed ?
Laughing Gas
Joined: Nov 2003
Posts: 898
Likes: 1
From: southeren Oh
If the front has plugs then I think you have just found the problem.
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Junior User
Joined: May 2008
Posts: 64
Likes: 0
From: Union,NJ
Remember these are Aussie heads they were originally on Cleveland engines
with coolant flowing through the front of the intake
I cant remember if i popped the plugs out
But i know i blocked the front ports to the intake
Ill find out when I pull the heads this weekend
with coolant flowing through the front of the intake
I cant remember if i popped the plugs out
But i know i blocked the front ports to the intake
Ill find out when I pull the heads this weekend
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Junior User
Joined: May 2008
Posts: 64
Likes: 0
From: Union,NJ
I was thinking about that too.............
today i removed the t stat housing and turned the water pump ---no coolant movement
so something is blocked, either the wrong head gaskets, or some blocked ports
Ill remove the heads and spin the water pump again to see if i have flow through the block.............
I did clean alot or radiator sealer out of the block, replaced all the freeze plugs too.
Maby i missed some ports (doubtful)
today i removed the t stat housing and turned the water pump ---no coolant movement
so something is blocked, either the wrong head gaskets, or some blocked ports
Ill remove the heads and spin the water pump again to see if i have flow through the block.............
I did clean alot or radiator sealer out of the block, replaced all the freeze plugs too.
Maby i missed some ports (doubtful)
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Junior User
Joined: May 2008
Posts: 64
Likes: 0
From: Union,NJ
I replaced the head gaskets last light
all ports are clear and gaskets were on right. head passages were good too
Im still stumped
later i will run the engine
I think i have a air pocket problem
all ports are clear and gaskets were on right. head passages were good too
Im still stumped
later i will run the engine
I think i have a air pocket problem
Elder User
Joined: Jan 2004
Posts: 887
Likes: 0
From: Colorado
One thing to try could be to temporarily remove the radiator from the bed of the truck, build a stand for the radiator, place radiator on the stand, in front of, and with the radiator cap just higher than your highest point of coolant flow for the engine and run it.
What is your "routine" for adding coolant to the system?
What is your "routine" for adding coolant to the system?