strange noises
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Senior User
Joined: Nov 2002
Posts: 316
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From: ca
strange noises
ok this is my problem i have a fresh rebuilt 400 with a new water pump radiator and thermostat.
when I shut off the car it makes odd noises coming from inside the water pump you can hear water boiling.
is it just air in the system? and if so how would i remove it?
when I shut off the car it makes odd noises coming from inside the water pump you can hear water boiling.
is it just air in the system? and if so how would i remove it?
Senior User
Joined: Jul 2003
Posts: 255
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From: Dallas/Fort Worth
strange noises
It probably IS the water boiling. Don't worry about it if it's not overheating, giving you any other problems, and the radiator cap is holding pressure.
When a motor is shut off the water stops circulating - the stuff sitting next to a hot-spot can start boiling. This is even more true of motors that have been bored out (like fresh rebuilds!) because the casting walls are thinner...
Motors will make all kinds of tinking and popping noises as they cool...
When a motor is shut off the water stops circulating - the stuff sitting next to a hot-spot can start boiling. This is even more true of motors that have been bored out (like fresh rebuilds!) because the casting walls are thinner...
Motors will make all kinds of tinking and popping noises as they cool...
Thread Starter
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Senior User
Joined: Nov 2002
Posts: 316
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From: ca
strange noises
hmm i was afraid it was the head gasket leaking, i ran the car with the radiator cap off for like 10 minutes and the water level would fluctuate, i assumed the head gasket was leaking, can anyone give me some sort of advice before i pull the head off?
p.s. i pulled the head once after about 20 minutes of run time and I reused the head gasket, (stupid I know)
p.s. i pulled the head once after about 20 minutes of run time and I reused the head gasket, (stupid I know)
Junior User
Joined: Feb 2002
Posts: 84
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From: indiana
strange noises
The water level will fluctuate somewhat as the T-stat opens and closes the water in the radiator sees pressure from the waterpump which will make the water level fluctuate . Hope this helps.
Posting Legend
Joined: Sep 2001
Posts: 30,255
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strange noises
Put a pressure tester on the radiator when the engine is cold. If you get a rapid rise in pressure (almost immediate) when you start the engine you may have a leaking head gasket. Stop the engine and relieve the pressure when it reaches the system operating pressure listed on your cap to avoid damage to your system and the tester.
You can rent/borrow a pressure tester at some auto parts stores.
You can rent/borrow a pressure tester at some auto parts stores.
Elder User
Joined: Feb 2002
Posts: 987
Likes: 2
From: East Bend, Carolina, U.S
strange noises
If there is air trapped in the engine in the coolant passages you may hear some boiling noises until the air escapes or you purge the air out of the system. Hopefully your engine is just doing this.
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Senior User
Joined: Nov 2002
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From: ca
strange noises
ok i put the pressure tester on it and after the thermostat opened it took a minute to reach 20 psi at which point i shut the car off. so what does this mean?
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Senior User
Joined: Jul 2003
Posts: 255
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From: Dallas/Fort Worth
strange noises
What Torque1st meant was the pressure would rise as soon as you started it - with the engine cold, not warmed up with the thermostat open.
If the head gasket is blown between a cylinder and a water passage the pressure in the cylinder 'blows' into the water passages, pressurizing them. at 120 PSI or so before the plug even fires this happens pretty fast...
If the head gasket is blown between a cylinder and a water passage the pressure in the cylinder 'blows' into the water passages, pressurizing them. at 120 PSI or so before the plug even fires this happens pretty fast...
Posting Guru
Joined: Aug 2000
Posts: 2,416
Likes: 4
From: PacNW
strange noises
It doesn't sound like you have a problem. The water level in the radiator will fluctuate as the thermostat opens & closes. The 'gurgling' noises you hear are fairly normal especially in a freshly rebuilt engine and/or relatively recently filled cooling system.
If you start seeing a lot of steam from the tailpipe after warmup or the oil starts looking like chocolate milk or you see oil floating in the radiator then you probably have a blown head gasket.
If you start seeing a lot of steam from the tailpipe after warmup or the oil starts looking like chocolate milk or you see oil floating in the radiator then you probably have a blown head gasket.
Cross-Country
Joined: Apr 2003
Posts: 52
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strange noises
Dustin,
I just recently had my 351C rebuilt. The machine shop accidentally put the passenger side head gasket on upside down (didn't make sure the "front with arrow" was facing front).
With the radiator cap off, I started the engine and within 5 minutes during my running in the cam, water started shooting out of the radiator like old faithful. I understand by what I have read in other forums that the gasket is set up to force water to the back of the block and heads and then passing to the front and then back to the pump, with some of it to the radiator. Well the passenger side of my block was a steam generator because most of the water was staying in the front of the engine.
Also, taking out the thermostat only made it happen faster. Also with the cap on, the hoses got hard as a rock.
Now with the gasket on upside down, I didn't have blowby, just steam in the block.
If you have these symptoms, I would think about the orientation of the head gasket when installed. Hope this helps. OBTW, the machine shop cheerfully fixed their mistake and my 351C rocks!
Steve
I just recently had my 351C rebuilt. The machine shop accidentally put the passenger side head gasket on upside down (didn't make sure the "front with arrow" was facing front).
With the radiator cap off, I started the engine and within 5 minutes during my running in the cam, water started shooting out of the radiator like old faithful. I understand by what I have read in other forums that the gasket is set up to force water to the back of the block and heads and then passing to the front and then back to the pump, with some of it to the radiator. Well the passenger side of my block was a steam generator because most of the water was staying in the front of the engine.
Also, taking out the thermostat only made it happen faster. Also with the cap on, the hoses got hard as a rock.
Now with the gasket on upside down, I didn't have blowby, just steam in the block.
If you have these symptoms, I would think about the orientation of the head gasket when installed. Hope this helps. OBTW, the machine shop cheerfully fixed their mistake and my 351C rocks!
Steve
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Senior User
Joined: Nov 2002
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From: ca
strange noises
well i pulled the head gasket and there was water in the number 3 cylinder case solved. the odd thing is that one of my lifters was destroyed, i saw the metal wire retaining clip thing sitting in the galley and the piece it holds in sticking out with the push rod being the only thing that held it down. the foot of the lifter seems badly worn, is this a case of a bad lifter or did my cam damage it?