During Nitrous pass, coolant overflow OVERFLOWS????

Stang8URMPRT

Active Member

Dec 28, 2003

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Daytona Beach, FL

May 23, 2004

#1

• May 23, 2004

• #1

Like I said... When I make a nitrous pass, coolant rushes into the overflow and out. Do I just need a new, higher pressure cap? I know the head gaskets are fine and no smoke out the car. Whatcha think?

Nick

 

Look Its Aaron

Your car looks like it came straight from Mexico.

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Nov 18, 2001

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Fontana, Cali

May 23, 2004

#2

• May 23, 2004

• #2

How do you know the head gaskets are fine? That would be my number 1 answer.

 

IndyBlk5.0

New Member

Nov 24, 2003

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New Whiteland, IN

May 23, 2004

#3

• May 23, 2004

• #3

me says headgaskets.

 

Stang8URMPRT

Active Member

Dec 28, 2003

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Daytona Beach, FL

May 23, 2004

#4

• May 23, 2004

• #4

Because this happened the same way with the last motor. After I melted a piston, I pulled the motor and the head gasket was FINE. Like fuggin' new. But it melted a piston. So I say it's not a head gasket because I know from experiance. I've been told by some others that this builds head very fast and causes a high pressure in the cooling system which opens the cap up and lets it all flow to the overflow.

Nick

 

SLiM JiM 156

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Mar 18, 2002

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Rohnert Park, CA

May 24, 2004

#5

• May 24, 2004

• #5

how old is the radiator cap, the only thing other than a head gasket that i can think of is when you spray, the coolant gets so hot it pops the cap spring and blows steam in and makes it overflow..

 

Ranchero5.0

The Voice of Reason

Jan 1, 1999

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Hagerstown MD

May 24, 2004

#6

• May 24, 2004

• #6

It's because under the extra stress of the nitrous you are lifting the heads and pushing combustion gasses into the coolant system. Same as a blower car with too much boost and too much timing. Been down this road many times. Back the timing off on your next run and see if it goes away.

Jamie

 

F

forrealb50

New Member

May 5, 2003

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VA

May 24, 2004

#7

• May 24, 2004

• #7

My stang is doing the same thing. I don't think it's a headgasket problem rather a head bolt problem. I sent you a pm...

 

Stang8URMPRT

Active Member

Dec 28, 2003

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Daytona Beach, FL

May 24, 2004

#8

• May 24, 2004

• #8

Ranchero5.0 said:

It's because under the extra stress of the nitrous you are lifting the heads and pushing combustion gasses into the coolant system. Same as a blower car with too much boost and too much timing. Been down this road many times. Back the timing off on your next run and see if it goes away.

Jamie

Click to expand...

You're the man. I'll try that. I enrich with 114 octane, so I didn't think detonation was a problem. i can't hear detonation. But I have heard of the combustion pressure lifting the heads.

Nick

 

DMAN302

My mom says thanks for the pearl necklace.

Nov 8, 2003

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windsor, Canada

May 24, 2004

#9

• May 24, 2004

• #9

Check see if lower hose is colapsing during the run, if there is no coil in the lower hose it could be collapsing causing a pressure spike.

 

dastang2

Active Member

Dec 11, 2003

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tx

May 24, 2004

#10

• May 24, 2004

• #10

DMAN302 said:

Check see if lower hose is colapsing during the run, if there is no coil in the lower hose it could be collapsing causing a pressure spike.

Click to expand...

lol, how would he see the hose while going 100mph. just messing with ya, how old are the head bolts, how much psi is the radiator cap and squeeze the bottom hose to feel for a coil spring.

 

DMAN302

My mom says thanks for the pearl necklace.

Nov 8, 2003

2,120

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windsor, Canada

May 24, 2004

#11

• May 24, 2004

• #11

Dow...ok you got me on the checking the hose during the run, but seriously you should always look at every posibility and if the hose does collapse the pressure has to go somewhere.

 

Stang8URMPRT

Active Member

Dec 28, 2003

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Daytona Beach, FL

May 24, 2004

#12

• May 24, 2004

• #12

You guys are being very helpful and I thank you. That's why I come on here and give all the advice I can give. Because you get it in return. . As far as the lower hose having a coil in it, it doesn't... The head bolts are ARP and about a year and a half old. The radiator cap is 13 psi I believe. Maybe I should get a 16 psi cap and a coiled lower hose.

Nick