bad engine? missing freeze plug
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bad engine? missing freeze plug
Hello
I am from denmark, so I may slip in some wrong words;-)
I am going to buy a boat with a 460cu 500HP engine, but one freeze plug has left the engine, even when most of the fresh water was dranied, is it possible the engine is damaged then?
Best regards
Kasper
I am from denmark, so I may slip in some wrong words;-)
I am going to buy a boat with a 460cu 500HP engine, but one freeze plug has left the engine, even when most of the fresh water was dranied, is it possible the engine is damaged then?
Best regards
Kasper
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Joined: Feb 2004
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From: Marengo, Iowa
That alone won't cause damage, unless it was run without any water running through it. I have seen some cases where the core plug has been blown out, but notheing particularly wrong with it. Had the heater in my diesel, which replaces the core plug, blow out once when I was trying to get going onapacked snow/ice... may be a similar situation.
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Thanks for the quick reply, lets say I am unlucky and a crack is located in the cyliender is it then possible to hear it when I start the engine? On the (bad) picture of the engine could someone maybe see the type of the caburator?
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Do a good inspection. Check compression on all the cylinders. See how dirty and sludgy the oil is.
I would say put one of the rubber screw plug and fill it with water. If it starts and runs without smoke and clanging I would say it is ok.
At least you would know if you had a buildable or usable engine.
I would say put one of the rubber screw plug and fill it with water. If it starts and runs without smoke and clanging I would say it is ok.
At least you would know if you had a buildable or usable engine.
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If I am going to check the compression on the cylinders, how many psi should I have? Is it possible for a crack to be half way through the enginge block towards the cylinders, or would it allways go all the way through?
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From: iowa
Kabers welcome to FTE.
don't worry so much about what the PSI is on a compression check but rather that they are even. No more than 5% I prefer to see them within 3psi highest to lowest, but a little more than that is ok.
As to the block it's actually pretty unusual for a freeze situation to crack the cylinder walls much more likely to crack the outside of the block usually right next to the core plug that is blown out. (block cracks opening up just enough to allow the plug to fall out)
don't worry so much about what the PSI is on a compression check but rather that they are even. No more than 5% I prefer to see them within 3psi highest to lowest, but a little more than that is ok.
As to the block it's actually pretty unusual for a freeze situation to crack the cylinder walls much more likely to crack the outside of the block usually right next to the core plug that is blown out. (block cracks opening up just enough to allow the plug to fall out)
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Joined: Jan 2006
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From: Fort Worth,Texas
Welcome to FTE Kabers.
Core plugs are commenley called freze plugs because it was comenley believed there functon was to pop out when a freze condition happend to prevent damage to the block. I have seen a block with ice extruding out the holes and after it warmed up we put new core plugs back in and drove that old car anouther year before I went into the milatarey.
Botem lin is there is a good chance the block wasen't dameged. I would put a ruber corplug in and do a preshur test, I have used a simple radiator preshure tester and if it holds well it's good
Good luck
Bill
Core plugs are commenley called freze plugs because it was comenley believed there functon was to pop out when a freze condition happend to prevent damage to the block. I have seen a block with ice extruding out the holes and after it warmed up we put new core plugs back in and drove that old car anouther year before I went into the milatarey.
Botem lin is there is a good chance the block wasen't dameged. I would put a ruber corplug in and do a preshur test, I have used a simple radiator preshure tester and if it holds well it's good
Good luck
Bill
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