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Radiator cracked, car runs hot sometomes - 2004 Suzuki Forenza

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Fit new radiator

Posted on Feb 18, 2009

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When you run the van the radiator cap does not get hot


Sounds like a cracked head or blown head gasket

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You probably have a cracked head gasket,Or evan the engine block could have a crack in it internally.

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Oil is getting n my radiator it is a cream color & thick like a gravy, my truck hasnt been running hot until a few weeks ago due 2 it getting so thick and wont rotate, everyone says its a cracked


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Instructions on how to use holts wondarwald


Holts Wondarweld
Flush engine.
EXTERNAL CRACKS
1 Run engine until hot,drain off enough coolant to remove thermostat.
2 Remove thermostat.
3 Mix contents of can thoughoughly! and pour contents into thermostat opening.
4 Replace thermostat cover.& fill radiator with hot water,replace radiator cap.
5 Run engine at a fast idle for 15 mins,dont allow to boil.Top up if necessary.
6 Leave Wondarweld in system for 2-3 days then drain off,flush system replace thermostat and refill.
HAIRLINE CRACKS
1 MIX thoroughly and pour into cold engine (radiator if it has a cap)
2 Run engine until hot.
3 Allow engine to cool then run again until hot.
4 Follow procedure 6 above.
INTERNAL CRACKS
1 Follow external crack instructions except after pouring Wondarweld into engine remove spark plug from
affected cylinder and run engine for 20 mins. If more than one cylinder affected run for 5 minute intervals.
2 Allow engine to cool then drain cooling system and refill with clean water.
3 Drain sump & flush,refill with fresh oil.
Note:- 1/2 pint of Wondarweld for every 6 pints of water,DO NOT add antifreeze for at least 3 days after process.

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My 2002 buick century is loosing coolant fast. When car isn't running around 60-70 mph is seems to heat up more than normal and no heat or ac will occur. Should I replace the thermostat? I noticed the fan...


it sounds like one of several problems radiator needs flushed , water pump is bad or going, thermostat is bad, pin hole in one of the hoses, cracked head, hole in radiator, hole in heater core.if core is leaking you will notice water on the floor inside the car on pasenger side. if radiator has hole when you fill radiator with coolant it will leak froom fins sometimes only when hot. thermostat bad your car will read hot and or cold always. if stuck open cold, if stuck closed hot, after about 15 20 mins of running engine will cause radiator to boil over to over flow tank.never open radiator cap when engine is hot :) burn hazard.if pump is bad or going will notice gauge reads hot intermittent or always. will boil in to overflow tank. if head is cracked will notice water comming from side of engine block or in oil when you change oil. if radiator needs to be flushed will notice scale or gunk on radiator cap
(if you think you need help or do not have tools to perform please take to a machanic)

Mar 14, 2011 | 2002 Buick Century

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If my radator is broken , will it prevent my car from starting


No.but it will damage your engine if you run it with out water

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Over heating


water pump, thermostat, or worst case radiator.

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I have a crown vic police interceptor 1997 4.6 it s running hot


These are notorius for cracking the intake m anifolds, they are plactic, just had one in the shop a week ago, look around the thermastat housing for cracks, I hope this helps you

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1999 Honda crv running hot


hi i don't know what mechanic you went to but blown head gasket will cause the engine not to idle/run right. usually when you replace the thermostate you have to then run the car obviously with water in the radiator and crack the little screw where the thermostate is located. this will allow the car to release any trapped air in the lines and you may need to keep topping up the radiator. im not a mechanic but i know alot about cars. i came across this problem in my holden ute. it was running hot and that was why. too much trapped air. easiest way is too crack that screw and remove it. run the car while keeping an eye on the radiator water level you will see if there is air in there it won't squirt water out continuously once it does run continously turn the car off put the screw back in warning it will be quite hot retop te radiatior if need and you should be good too go. it solved the same problem i had. have fun cheers

Oct 11, 2008 | 1998 Honda CR-V

1 Answer

Car heats up, and seems to run out of water quick without leaking the water. I see the radiator but the only means of filling the radiator is the reservoir tank, and once you fill that one there is no more...


There is no radiator cap, the Lanos has what is called a "sealed cooling system", popular on newer model European cars and most Asian models, even some of the latest US made cars. You can squeeze and release the upper radiator hose repeatedly to "pump" some of the air out/water in.

The engine has to be leaking water somewhere. It could be a small leak that only leaks under pressure (when the car is hot) and the water is evaporating as fast as it leaks out. This kind of leak can be very hard to find! I had this problem on my daughter's 2001 Lanos until today, when I found the leak. A heater hose burst today while she was getting gas, luckily the car was stopped! It had been using about a tank full of water every month (about one quart or liter), but could find no leak. I suspected a leaking head gasket or cracked (which could be your problem), and was preparing to take the head off when she was on Christmas break from college. I'm glad that hose burts!

A leaking head gasket or cracked head is hard to detect. Most of the time there will only be a small leak when the engine is hot, and the small amount of water pulled into a cylinder is vaporised as the engine runs. There will be no water in the oil unless there is a large leak. Pull the oil dip stick and look under the oil fill cap. If there is a tan looking substance on either one there is water in the oil and you definitely have a cracked head or leaking head gasket. If it's just the gasket you're lucky -- the gasket will usually only leak if the engine has been run very hot (boiling over and then run a bit), and then the head will either crack or warp. A warped head can be repaired, but must be taken to a machine shop for repair. A machine shop can also check a head for cracks, as the cracks are usually too small to see, and usually only open and leak when the head is hot (normal engine operating temperature).

Sep 19, 2008 | 2001 Daewoo Lanos

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