need help really bad

302crew · 03-24-2002, 09:20 PM

ive just finished building my new mustang this is the combo 86 bottom end 87 heads and an 86 intake here is the problem it overheats it has a new water pump radiator and cap and thermostat. could the problem be that the gaskets arnt right with the 86 and 87 combo im using 87-93 gaskets any suggestions would be very much appriciated. also whenever it overheats it gets up to like 270 i stop and let it cool off and there is missing out of the radiator and the overflow is pretty full and i did a presure test on it and it was fine please help me

nextime · 03-24-2002, 11:45 PM

the new waterpump could be bad and also did you make sure all of the air is out of the engine when you filled it up with antifreeze also check and see what the antifreeze mixture is set at, it should be at -34 to -30 at least. did you do a 50/50 water/antifreeze mix?

302crew · 03-25-2002, 01:02 AM

im using straight water because it all blows out and its not worth me putting in antefreeze every time and this is the second water pump

Hozer 88GTConv · 03-25-2002, 01:08 PM

You didn't mention your fan clutch and that is a big one. The fan plays a very important role in pulling your air in.
Also, vapor lock might be worth investigating. You can check by putting a water neck with a release plug at the thermostat. Also, check that your thermostat is installed correctly. Good luck.

Hozer 88GTConv · 03-25-2002, 01:11 PM

By the way, that hissing is coming from the water in your system that is BOILING into your expansion tank and escaping as superheated vapor. That is not good. I would not drive it until you fixed your problem. Good luck, check the fan clutch first.

Jeb_Bush_2000 · 03-25-2002, 02:52 PM

I had a Fiero that did that once.

The coolant was boiling so fiercely you could hear it in the house, and the heat deformed the recovery bottle.

Ironically, the engine was fine. It would run on terrible gas, two quarts low on oil, and 300* temps...but only made 90hp.

302crew · 03-25-2002, 03:06 PM

i do have an elctric fan in it and its the same one i have in my drag car and it keeps it very cool the car heats up only when you beat on it and the water just disapears but it still pulls like an animal

Thad · 03-25-2002, 03:45 PM

the gaskets could be blocking a coolant passage.
is the thermostat good?

Jeb_Bush_2000 · 03-25-2002, 03:46 PM

Run some antifreeze in there. I believe using straight water can cause steam pockets to form in the heads. That, and a 50/50 mix boils a lot higher than just water.

Hozer 88GTConv · 03-25-2002, 04:44 PM

That is true about coolant that it increases the boiling point of your solution. Good luck...

nextime · 03-25-2002, 05:01 PM

no wonder why it over heats. i tried to be cheap when i was alot younger (age 16) and run straight water no antifreeze. i found out after replacing the warped head and exploded radiator that antifreeze wasnt so expensive after all in fact it is alot cheaper than a new head and radiator plus labor costs. good luck on the 100% water mix.

302crew · 03-25-2002, 06:08 PM

i ussually run straight water in my other car with no problems cause the track by me doesnt let you run antifreeze in your car and the guys at downs ford just suggested a blown head gasket and for me to drain my oil but i dont see that being the problem

srv1 · 03-25-2002, 07:05 PM

302. did the overheating problem happen after you put the new pump in? if it did, make sure you didnt get the wrong water pump from the parts store. v-belt water pumps run clockwise as for the mustangs, i think they run counter-clockwise, meaning it isnt pumping. it is not that common to happen, but it does. that is the only thing i can thing of.

302crew · 03-25-2002, 07:56 PM

ive had one on it from an 87 stang then i just put another one on it from an 87 stang

srv1 · 03-25-2002, 09:54 PM

302. i have seen people put the thermostat in backwards on 302's before. did you point the thermostat towards the radiator? remember, i dont know how much you know, so dont take it as an insult if you already know.

302crew · 03-25-2002, 11:29 PM

nope its in the right way

onesillylx50 · 03-27-2002, 03:48 PM

hey guys. I'm the owner of this mustang. It's not so much the overheating problem as it is the disappearing of the water. Once we fill up the radiator and beat the car up a bit the water in the radiator is missing. Ive been told that i could possible be a blown head gasket or intake gasket that is blocking the passages. I just drained the oil, now there seems to be no traces of water in there so now I am flustered... please reply with some input. Thanks

302crew · 03-27-2002, 06:26 PM

well i just started to tear the motor apart and i found water in the egr passages the upper intake throttle body could this mean i just have a bad intake gasket

302crew · 03-27-2002, 11:55 PM

anybody

onesillylx50 · 03-28-2002, 02:32 AM

anybody, we need extreme help here... This car is my daily driver!!

03-24-2002, 09:20 PM	#1
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	need help really bad ive just finished building my new mustang this is the combo 86 bottom end 87 heads and an 86 intake here is the problem it overheats it has a new water pump radiator and cap and thermostat. could the problem be that the gaskets arnt right with the 86 and 87 combo im using 87-93 gaskets any suggestions would be very much appriciated. also whenever it overheats it gets up to like 270 i stop and let it cool off and there is missing out of the radiator and the overflow is pretty full and i did a presure test on it and it was fine please help me __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

03-24-2002, 11:45 PM	#2
nextime Registered Member Join Date: Sep 1998 Location: Brookfield,Wisconsin,US Posts: 23	waterpump the new waterpump could be bad and also did you make sure all of the air is out of the engine when you filled it up with antifreeze also check and see what the antifreeze mixture is set at, it should be at -34 to -30 at least. did you do a 50/50 water/antifreeze mix? __________________ Thank You! 2003 Cobra Convertible

03-25-2002, 01:02 AM	#3
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	im using straight water because it all blows out and its not worth me putting in antefreeze every time and this is the second water pump __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

03-25-2002, 01:08 PM	#4
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Fan clutch? You didn't mention your fan clutch and that is a big one. The fan plays a very important role in pulling your air in. Also, vapor lock might be worth investigating. You can check by putting a water neck with a release plug at the thermostat. Also, check that your thermostat is installed correctly. Good luck. __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

03-25-2002, 01:11 PM	#5
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Hissing... By the way, that hissing is coming from the water in your system that is BOILING into your expansion tank and escaping as superheated vapor. That is not good. I would not drive it until you fixed your problem. Good luck, check the fan clutch first. __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

03-25-2002, 02:52 PM	#6
Jeb_Bush_2000 Registered Member Join Date: Jul 2001 Location: Taxachusetts Posts: 374	I had a Fiero that did that once. The coolant was boiling so fiercely you could hear it in the house, and the heat deformed the recovery bottle. Ironically, the engine was fine. It would run on terrible gas, two quarts low on oil, and 300* temps...but only made 90hp.

03-25-2002, 03:06 PM	#7
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	i do have an elctric fan in it and its the same one i have in my drag car and it keeps it very cool the car heats up only when you beat on it and the water just disapears but it still pulls like an animal

03-25-2002, 03:45 PM	#8
Thad Registered Member Join Date: Oct 1999 Location: Stuart, FL US Posts: 192	the gaskets could be blocking a coolant passage. is the thermostat good? __________________ 90 LX 5.0 ,bored 302, MSD 6AL, Twisted Wedge TrickFlo HDs, World class T5, BBK fender cold air induct., 70mm TB,Edelbrock performer Intake, aluminum Drve shaft, 3.55 Gears, Long Tube Headers to Flowmasters.

03-25-2002, 03:46 PM	#9
Jeb_Bush_2000 Registered Member Join Date: Jul 2001 Location: Taxachusetts Posts: 374	Run some antifreeze in there. I believe using straight water can cause steam pockets to form in the heads. That, and a 50/50 mix boils a lot higher than just water.

03-25-2002, 04:44 PM	#10
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Coolant... That is true about coolant that it increases the boiling point of your solution. Good luck... __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

03-25-2002, 05:01 PM	#11
nextime Registered Member Join Date: Sep 1998 Location: Brookfield,Wisconsin,US Posts: 23	no anitfreeze!! no wonder why it over heats. i tried to be cheap when i was alot younger (age 16) and run straight water no antifreeze. i found out after replacing the warped head and exploded radiator that antifreeze wasnt so expensive after all in fact it is alot cheaper than a new head and radiator plus labor costs. good luck on the 100% water mix. __________________ Thank You! 2003 Cobra Convertible

03-25-2002, 06:08 PM	#12
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	i ussually run straight water in my other car with no problems cause the track by me doesnt let you run antifreeze in your car and the guys at downs ford just suggested a blown head gasket and for me to drain my oil but i dont see that being the problem __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

03-25-2002, 07:05 PM	#13
srv1 Get down..... Join Date: Apr 2001 Location: Room 103 Posts: 2,095	302. did the overheating problem happen after you put the new pump in? if it did, make sure you didnt get the wrong water pump from the parts store. v-belt water pumps run clockwise as for the mustangs, i think they run counter-clockwise, meaning it isnt pumping. it is not that common to happen, but it does. that is the only thing i can thing of. __________________ Cobra brakes are on! Finally..... ------------------------------------------------

03-25-2002, 07:56 PM	#14
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	ive had one on it from an 87 stang then i just put another one on it from an 87 stang __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

03-25-2002, 09:54 PM	#15
srv1 Get down..... Join Date: Apr 2001 Location: Room 103 Posts: 2,095	302. i have seen people put the thermostat in backwards on 302's before. did you point the thermostat towards the radiator? remember, i dont know how much you know, so dont take it as an insult if you already know. __________________ Cobra brakes are on! Finally..... ------------------------------------------------

03-25-2002, 11:29 PM	#16
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	nope its in the right way __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

03-27-2002, 03:48 PM	#17
onesillylx50 Registered Member Join Date: Mar 2002 Location: ny Posts: 11	hey guys. I'm the owner of this mustang. It's not so much the overheating problem as it is the disappearing of the water. Once we fill up the radiator and beat the car up a bit the water in the radiator is missing. Ive been told that i could possible be a blown head gasket or intake gasket that is blocking the passages. I just drained the oil, now there seems to be no traces of water in there so now I am flustered... please reply with some input. Thanks

03-27-2002, 06:26 PM	#18
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	well i just started to tear the motor apart and i found water in the egr passages the upper intake throttle body could this mean i just have a bad intake gasket __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

03-27-2002, 11:55 PM	#19
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	anybody __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

03-28-2002, 02:32 AM	#20
onesillylx50 Registered Member Join Date: Mar 2002 Location: ny Posts: 11	anybody, we need extreme help here... This car is my daily driver!!