need help with my new supra

peterjh · 03-17-2008, 04:54 AM

i just bought a 1989 supra , non turbo, the rad was shot so i replaced it, after replacing the rad it started smoking alot and hasnt stopped, after running it for about ten minutes, coolant starts boiling out of the spark plugs. I have my suspicions the head is cracked. this is the first supra that i have owned and i dont know alot about them. i was wondering if anyone could give me some feedback n what this problem is , or if there are any inexpensive ways i can diagnose what the problem could be any help would be greatly appreciated

Busted Knuckles · 03-18-2008, 02:06 PM

If you suspect cooling system problems, a cooling system pressure tester is a nice tool. Basically, it is a hand pump with a fitting that will replace the radiator cap. It also has a gauge on it. Pump it up to the operating pressure, and see if it holds. Any leaks will cause the pressure to drop, and may force coolant out of the leak. You should also be able to heard the leak if the air is being forced out. This can be done on a cool engine, but the engine should be warmed up first. This test is done with the engine NOT running.

P.S. - Autozone has it in their Rent-a-tool line-up.

peterjh · 03-18-2008, 11:59 PM

thank you for the input i will try that one of these days. we are doin some other tests, and i was offered o newer motor for 300 bucks so im thinking about that

03-17-2008, 04:54 AM	#1
peterjh Stock Join Date: Mar 2008 Location: canada Posts: 2	need help with my new supra i just bought a 1989 supra , non turbo, the rad was shot so i replaced it, after replacing the rad it started smoking alot and hasnt stopped, after running it for about ten minutes, coolant starts boiling out of the spark plugs. I have my suspicions the head is cracked. this is the first supra that i have owned and i dont know alot about them. i was wondering if anyone could give me some feedback n what this problem is , or if there are any inexpensive ways i can diagnose what the problem could be any help would be greatly appreciated

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03-18-2008, 02:06 PM	#2
Busted Knuckles 12psi boost Join Date: Dec 2007 Location: Atlanta Posts: 300	If you suspect cooling system problems, a cooling system pressure tester is a nice tool. Basically, it is a hand pump with a fitting that will replace the radiator cap. It also has a gauge on it. Pump it up to the operating pressure, and see if it holds. Any leaks will cause the pressure to drop, and may force coolant out of the leak. You should also be able to heard the leak if the air is being forced out. This can be done on a cool engine, but the engine should be warmed up first. This test is done with the engine NOT running. P.S. - Autozone has it in their Rent-a-tool line-up.

03-18-2008, 11:59 PM	#3
peterjh Stock Join Date: Mar 2008 Location: canada Posts: 2	thank you for the input i will try that one of these days. we are doin some other tests, and i was offered o newer motor for 300 bucks so im thinking about that